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# @suaveplan/better-auth-surrealdb - Better-Auth Adapter for SurrealDB v3 — bundles the canonical 17-table SurrealQL schema, compiles Better-Auth Where[] filters to parameterised SurrealQL, auto-prefixes record-link fields on write, strips prefixes on read, supports record-id/plain/ulid id strategies, and ships an OTel-instrumented conformance harness for cross-package consumption.
Better-Auth Adapter for SurrealDB v3 — bundles the canonical 17-table
SurrealQL schema, compiles Better-Auth `Where[]` filters to parameterised
SurrealQL, auto-prefixes record-link fields on write, strips prefixes on
read, supports `record-id` / `plain` / `ulid` id strategies, and ships an
OTel-instrumented conformance harness for cross-package reuse.
<!-- begin:auto-docs -->
## Documentation tree
- [adapter](./src/adapter/adapter.md) — The package's flagship export. `createBetterAuthSurrealAdapter(options)` returns a Better-Auth `Adapter` whose 8 contra…
- [adapter](./src/adapter/adapter.md) — The package's flagship export. `createBetterAuthSurrealAdapter(options)` returns a Better-Auth `Adapter` whose 8 contra…
- [internals](./src/adapter/internals.md) — Shared internal helpers consumed by the adapter shell (`adapter.ts`) and the per-method operation runners (`operations.…
- [model-to-table](./src/adapter/model-to-table.md) — Memoising mapper from Better-Auth model name to SurrealDB table name. The mapper function is invoked once per distinct…
- [operations](./src/adapter/operations.md) — Hosts the five primitive runners (`runCreate`, `runFindMany`, `runUpdateMany`, `runDeleteMany`, `runCount`) that transl…
- [v1.6](./src/adapter/v1.6.md) — `betterAuthSurrealAdapter(options)` is the Better-Auth **v1.6** integration surface for `@suaveplan/better-auth-surreal…
- [compile-select](./src/compile/compile-select.md) — Compiles a Better-Auth `select?: string[]` projection into a SurrealQL column list. Used inside the adapter's `SELECT`…
- [compile-sort](./src/compile/compile-sort.md) — Compiles a Better-Auth `sortBy?: { field; direction }` argument into a SurrealQL `ORDER BY` fragment, validating the fi…
- [compile-where](./src/compile/compile-where.md) — Translates Better-Auth's `Where[]` filter union into a parameterised SurrealQL `WHERE` fragment plus a binding record.…
- [error-codes](./src/error-codes/error-codes.md) — Defines the closed registry of error codes raised from every public path of `@suaveplan/better-auth-surrealdb`. Stable…
- [error-codes](./src/error-codes/error-codes.md) — Defines the closed registry of error codes raised from every public path of `@suaveplan/better-auth-surrealdb`. Stable…
- [id-strategy](./src/id-strategy/id-strategy.md) — Encapsulates the three Better-Auth record-id strategies the adapter supports. SurrealDB's native record-id format is `<…
- [id-strategy](./src/id-strategy/id-strategy.md) — Encapsulates the three Better-Auth record-id strategies the adapter supports. SurrealDB's native record-id format is `<…
- [link-fields](./src/link-fields/link-fields.md) — Encapsulates the central design decision of this package: SurrealDB stores record references as typed `record<target>`…
- [link-fields](./src/link-fields/link-fields.md) — Encapsulates the central design decision of this package: SurrealDB stores record references as typed `record<target>`…
- [otel](./src/otel/instruments.md) — Wires the package's OpenTelemetry metrics surface and exposes a thin `instrument(op)` helper the adapter wraps around e…
- [instruments](./src/otel/instruments.md) — Wires the package's OpenTelemetry metrics surface and exposes a thin `instrument(op)` helper the adapter wraps around e…
- [schema](./src/schema/schema.md) — Bundles the canonical 17-table Better-Auth SurrealQL schema as a frozen string constant `BETTER_AUTH_SURREAL_SCHEMA` an…
- [schema](./src/schema/schema.md) — Bundles the canonical 17-table Better-Auth SurrealQL schema as a frozen string constant `BETTER_AUTH_SURREAL_SCHEMA` an…
- [link-fields](./src/schemas/link-fields.md) — Zod boundary schema asserting the structural shape of a `LinkFieldMap`. Used to validate the optional `linkFields` argu…
- [options](./src/schemas/options.md) — Zod boundary schema for `BetterAuthSurrealAdapterOptions`. Drives the runtime validation step inside `createBetterAuthS…
- [testing](./src/testing/run-adapter-conformance.md) — Exposes `runAdapterConformance(factory)` — the reusable suite that pins every Better-Auth Adapter scenario this package…
- [run-adapter-conformance](./src/testing/run-adapter-conformance.md) — Exposes `runAdapterConformance(factory)` — the reusable suite that pins every Better-Auth Adapter scenario this package…
- [types](./src/types/adapter.md) — Type-only foundation for the entire package. Defines the public option shape (`BetterAuthSurrealAdapterOptions`), the r…
- [adapter](./src/types/adapter.md) — Type-only foundation for the entire package. Defines the public option shape (`BetterAuthSurrealAdapterOptions`), the r…
<!-- end:auto-docs -->
## Quick start
```ts
import { SurrealAdapter } from "@suaveplan/surrealdb";
import { applyBetterAuthSchema } from "@suaveplan/better-auth-surrealdb/schema";
import { betterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter/v1.6";
import { betterAuth } from "better-auth";
const client = new SurrealAdapter({
url: "ws://localhost:8000",
namespace: "auth",
database: "auth",
username: "root",
password: process.env.SURREAL_PASSWORD,
});
await client.connect();
await applyBetterAuthSchema(client);
export const auth = betterAuth({
database: betterAuthSurrealAdapter({ client }),
secret: process.env.BETTER_AUTH_SECRET,
baseURL: "http://localhost:3000",
emailAndPassword: { enabled: true },
});
```
### Advanced — direct conformance harness usage
The v1.4-shape `createBetterAuthSurrealAdapter` returns the 10-method
adapter directly (without the `createAdapterFactory` wrapper). This is the
surface the `./testing` conformance harness consumes and the right
choice when you want to bypass Better-Auth's field-transformation layer:
```ts
import { createBetterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter";
const adapter = createBetterAuthSurrealAdapter({ client });
await adapter.create({ model: "user", data: { id: "u1", email: "a@b" } });
```
## Bundled schema — 17 Better-Auth tables
Mirrored byte-for-byte from
`/mnt/f/surrealdb/surql/features/02-auth/02-better-auth.surql`. Schema
version moves in lockstep with this package version. Upstream changes to
the canonical schema require a coordinated package version bump.
| Table | `userId` shape | Notes |
|-----------------------|-------------------------|--------------------------------------------------------|
| `user` (extended) | n/a | Extends host's user table with `emailVerified`/`name`/`image` |
| `session` | `record<user>` | Has default `linkFields.session.userId = "user"` |
| `account` | `string` | Flat-string userId — NOT in `DEFAULT_BETTER_AUTH_LINK_FIELDS` |
| `verification` | n/a | Single-use token storage |
| `passkey` | `record<user>` | WebAuthn credentials |
| `jwks` | n/a | Server JWK pairs |
| `sso_provider` | `option<record<user>>` | Optional record-link |
| `oauth_application` | `string` (option) | Flat-string userId |
| `oauth_access_token` | `string` (option) | Flat-string userId |
| `oauth_consent` | `string` (option) | Flat-string userId |
| `organization` | n/a | Slug-unique tenant root |
| `member` | record × 2 | `userId`+`organizationId` both record-links |
| `invitation` | record × 3 | `inviterId`/`organizationId`/`teamId` record-links |
| `team` | `record<organization>` | Belongs to org |
| `team_member` | record × 2 | `userId`+`teamId` |
| `two_factor` | `record<user>` | TOTP secret + backup codes |
| `api_key` | `record<user>` | Long-lived API keys with rate-limit fields |
Plus 13 indexes (account provider, verification identifier, SSO provider
id, oauth client/access/refresh tokens, organization slug, passkey
credential, user phone, api_key prefix/user, member/team uniqueness,
invitation email/org).
## `linkFields` — overriding the default record-link map
`DEFAULT_BETTER_AUTH_LINK_FIELDS` covers every `record<...>` column in
the bundled schema. Pass your own `linkFields` when your schema differs:
```ts
import { createBetterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter";
// Flat-string schema everywhere — disable prefix manipulation:
createBetterAuthSurrealAdapter({ client, linkFields: {} });
// Mixed override:
createBetterAuthSurrealAdapter({
client,
linkFields: {
session: { userId: "user" }, // keep default
member: { userId: "user", organizationId: "tenant" }, // rename target
},
});
```
## `idStrategy` — record-id format
| Strategy | Behaviour |
|-------------|--------------------------------------------------------------------------------------------|
| `record-id` (default) | `data.id` becomes the SurrealDB record component (`<table>:<id>`). Rejects `id` containing `:`. Returned `id` is bare. |
| `plain` | `id` stored as a normal field; SurrealDB auto-generates the storage id. |
| `ulid` | When `data.id` missing, generates a 26-char Crockford-base32 ULID and applies `record-id`. |
## Conformance harness
```ts
import { SurrealDBFixture } from "@suaveplan/testing-integration-surrealdb";
import { runAdapterConformance } from "@suaveplan/better-auth-surrealdb/testing";
const fixture = new SurrealDBFixture();
let adapter: ReturnType<typeof createBetterAuthSurrealAdapter>;
let client: SurrealAdapter;
beforeAll(async () => {
const cfg = await fixture.start();
client = new SurrealAdapter(cfg);
await client.connect();
await applyBetterAuthSchema(client);
adapter = createBetterAuthSurrealAdapter({ client });
}, 120_000);
afterAll(async () => {
await client.disconnect();
await fixture.stop();
});
runAdapterConformance(() => ({ client, adapter }));
```
## Peer deps
- `better-auth` ^1.4.0 — supplied by the consuming app. Type-only at this
package's boundary; never imported at runtime so the adapter ships
cleanly to apps using any 1.4+ minor.
## Subpath exports
`.`, `./adapter`, `./adapter/v1.6`, `./compile`, `./id-strategy`,
`./link-fields`, `./schema`, `./schemas/options`, `./schemas/link-fields`,
`./testing`, `./error-codes`, `./otel`, `./types`.

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{
"name": "@suaveplan/better-auth-surrealdb",
"version": "0.1.0",
"type": "module",
"sideEffects": false,
"description": "Better-Auth Adapter for SurrealDB v3 — bundles the canonical 17-table SurrealQL schema, compiles Better-Auth Where[] filters to parameterised SurrealQL, auto-prefixes record-link fields on write, strips prefixes on read, supports record-id/plain/ulid id strategies, and ships an OTel-instrumented conformance harness for cross-package consumption.",
"license": "MIT",
"author": "Suaveplan Team",
"main": "./dist/index.js",
"module": "./dist/index.js",
"types": "./dist/index.d.ts",
"exports": {
"./package.json": "./package.json",
".": {
"import": {
"types": "./dist/index.d.ts",
"default": "./dist/index.js"
},
"require": {
"types": "./dist/index.d.ts",
"default": "./dist/index.js"
}
},
"./adapter": {
"import": {
"types": "./dist/adapter/adapter.d.ts",
"default": "./dist/adapter/adapter.js"
}
},
"./adapter/v1.6": {
"import": {
"types": "./dist/adapter/v1.6.d.ts",
"default": "./dist/adapter/v1.6.js"
}
},
"./compile": {
"import": {
"types": "./dist/compile/index.d.ts",
"default": "./dist/compile/index.js"
}
},
"./id-strategy": {
"import": {
"types": "./dist/id-strategy/id-strategy.d.ts",
"default": "./dist/id-strategy/id-strategy.js"
}
},
"./link-fields": {
"import": {
"types": "./dist/link-fields/link-fields.d.ts",
"default": "./dist/link-fields/link-fields.js"
}
},
"./schema": {
"import": {
"types": "./dist/schema/schema.d.ts",
"default": "./dist/schema/schema.js"
}
},
"./schemas/options": {
"import": {
"types": "./dist/schemas/options.d.ts",
"default": "./dist/schemas/options.js"
}
},
"./schemas/link-fields": {
"import": {
"types": "./dist/schemas/link-fields.d.ts",
"default": "./dist/schemas/link-fields.js"
}
},
"./testing": {
"import": {
"types": "./dist/testing/index.d.ts",
"default": "./dist/testing/index.js"
}
},
"./error-codes": {
"import": {
"types": "./dist/error-codes/error-codes.d.ts",
"default": "./dist/error-codes/error-codes.js"
}
},
"./otel": {
"import": {
"types": "./dist/otel/instruments.d.ts",
"default": "./dist/otel/instruments.js"
}
},
"./types": {
"import": {
"types": "./dist/types/adapter.d.ts",
"default": "./dist/types/adapter.js"
}
}
},
"scripts": {
"build": "vite build",
"test": "vitest run --passWithNoTests",
"test:watch": "vitest",
"test:coverage": "vitest run --coverage --passWithNoTests",
"lint": "bunx biome check src/",
"lint:fix": "bunx biome lint --fix --unsafe --max-diagnostics 500 src/",
"format": "bunx biome format --write --max-diagnostics 500 src/",
"check": "bunx biome check --write --unsafe --max-diagnostics 500 src/",
"typecheck": "bunx tsc --noEmit --composite false -p tsconfig.lib.json",
"docs:check": "bun run ../../../../scripts/docs-check.ts ."
},
"dependencies": {
"@opentelemetry/api": "catalog:observability",
"@suaveplan/error": "workspace:^",
"@suaveplan/surrealdb": "workspace:^",
"@suaveplan/types": "workspace:^",
"surrealdb": "catalog:database",
"tslib": "catalog:build",
"zod": "catalog:forms"
},
"peerDependencies": {
"better-auth": "catalog:auth"
},
"devDependencies": {
"@opentelemetry/sdk-metrics": "1.30.0",
"@suaveplan/testing": "workspace:^",
"@suaveplan/testing-integration": "workspace:^",
"@suaveplan/testing-integration-surrealdb": "workspace:^",
"@types/node": "catalog:",
"@vitest/coverage-istanbul": "catalog:testing",
"better-auth": "catalog:auth",
"fast-check": "catalog:testing",
"surrealdb": "catalog:database",
"typescript": "catalog:",
"vite": "catalog:build",
"vite-plugin-dts": "catalog:build",
"vitest": "catalog:testing"
},
"publishConfig": {
"registry": "https://npmjs.fq.io/",
"access": "public"
},
"files": ["dist", "src", "README.md"]
}

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# adapter
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
The package's flagship export. `createBetterAuthSurrealAdapter(options)`
returns a Better-Auth `Adapter` whose 8 contract methods plus
`consumeOne` and `id` are wired against a SurrealDB v3 connection. The
adapter validates options through Zod at the boundary, dispatches every
CRUD method through OTel-instrumented spans, applies link-field
prefix/strip on writes/reads, and compiles `Where[]` filters into
parameterised SurrealQL — no string interpolation, no mocks, no
`vi.mock`.
## Features
- Stable `id` constant `"@suaveplan/better-auth-surrealdb"`.
- All 8 Better-Auth methods: `create`, `findOne`, `findMany`, `count`,
`update`, `updateMany`, `delete`, `deleteMany`, plus the `consumeOne`
primitive Better-Auth v1.6+ adds atop the older 8 methods.
- Link-field-aware writes and reads — `userId: "u1"` becomes
`userId: "user:u1"` at rest for `record<user>` columns.
- Three id-strategies (`record-id` default, `plain`, `ulid`).
- OTel counter + histogram via `instrument()`.
- Zod-validated options at the boundary; failures raise
`BetterAuthSurrealError(INVALID_INPUT)` with the `ZodError` as `cause`.
- Connection-readiness check: every method validates `client.isConnected`
and raises `CONNECTION_NOT_READY` when the underlying SurrealAdapter
has not connected.
- Underlying `SurrealError` failures wrap in `QUERY_FAILED` preserving the
`cause` chain.
## Usage: Basic
```ts
import { SurrealAdapter } from "@suaveplan/surrealdb";
import { applyBetterAuthSchema } from "@suaveplan/better-auth-surrealdb/schema";
import { createBetterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter";
const client = new SurrealAdapter({ url: "ws://localhost:8000" });
await client.connect();
await applyBetterAuthSchema(client);
const adapter = createBetterAuthSurrealAdapter({ client });
await adapter.create({
model: "session",
data: { id: "s1", userId: "u1", token: "t" },
});
```
## Usage: Advanced
```ts
import { createBetterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter";
const adapter = createBetterAuthSurrealAdapter({
client: surrealAdapter,
idStrategy: "ulid",
modelToTable: (m) => `bauth_${m}`,
linkFields: {
// override default — match a flat-string schema:
session: {},
member: { organizationId: "organization" },
},
});
const user = await adapter.findOne({
model: "user",
where: [{ field: "email", value: "x@y" }],
select: ["id", "email"],
});
```
## API Reference
- `createBetterAuthSurrealAdapter(options): BetterAuthSurrealAdapter`
- `BETTER_AUTH_SURREAL_ADAPTER_ID = "@suaveplan/better-auth-surrealdb"`
- `BetterAuthSurrealAdapter` — structural type satisfying Better-Auth's
`DBAdapter` minus `transaction` / `createSchema` (the host's own
transaction primitive remains reachable via `SurrealAdapter.transaction`).
## Implementation Notes
The adapter's `client.query()` calls pass the binding record as
`[vars]` so both `SurrealAdapter` (which flattens a trailing record) and
hand-rolled `SurrealClientView` implementations receive the same shape.
`update` is implemented atop `updateMany`'s `RETURN AFTER` row stream and
returns the first row — `count() FROM <table> WHERE … GROUP ALL` returns
a `{ c: <num> }` row by aliasing; bare `count()` returns the count
unnamed which trips SurrealDB v3's stricter row shape. `consumeOne`
fetches the row first, then deletes by the same predicate; this is the
fallback path Better-Auth's factory installs when an adapter does not
expose a native consume primitive, and gives the same race semantics
under SurrealDB's read-then-delete pipeline.

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import { describe, expect, expectTypeOf, it } from "@suaveplan/testing/runner";
import { ZodError } from "zod";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import {
BETTER_AUTH_SURREAL_ADAPTER_ID,
type BetterAuthSurrealAdapter,
createBetterAuthSurrealAdapter,
} from "./adapter.js";
describe("createBetterAuthSurrealAdapter (factory)", () => {
it("factory produces every Better-Auth Adapter method", {
timeout: 5000,
}, () => {
const adapter = createBetterAuthSurrealAdapter({
client: new FakeClient(),
});
expect(adapter.id).toBe(BETTER_AUTH_SURREAL_ADAPTER_ID);
for (const m of [
"create",
"findOne",
"findMany",
"update",
"updateMany",
"delete",
"deleteMany",
"count",
"consumeOne",
]) {
expect(
typeof (adapter as unknown as Record<string, unknown>)[m]
).toBe("function");
}
});
it("invalid options raise INVALID_INPUT carrying ZodError", {
timeout: 5000,
}, () => {
try {
createBetterAuthSurrealAdapter(
{} as unknown as Parameters<
typeof createBetterAuthSurrealAdapter
>[0]
);
expect.fail("should have thrown");
} catch (err) {
expect(err).toBeInstanceOf(BetterAuthSurrealError);
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.INVALID_INPUT"
);
expect((err as Error).cause).toBeInstanceOf(ZodError);
}
});
it("rejects malformed linkFields with INVALID_INPUT", {
timeout: 5000,
}, () => {
expect(() =>
createBetterAuthSurrealAdapter({
client: new FakeClient(),
linkFields: {
session: { userId: 5 as unknown as string },
},
})
).toThrow(BetterAuthSurrealError);
});
it("satisfies the BetterAuthSurrealAdapter type via expectTypeOf", {
timeout: 5000,
}, () => {
const adapter = createBetterAuthSurrealAdapter({
client: new FakeClient(),
});
expectTypeOf(adapter).toMatchTypeOf<BetterAuthSurrealAdapter>();
});
it("raises CONNECTION_NOT_READY when client is not connected", {
timeout: 5000,
}, async () => {
const client = new FakeClient();
client.isConnected = false;
const adapter = createBetterAuthSurrealAdapter({ client });
await expect(
adapter.create({
model: "user",
data: { id: "u1" } as unknown as Record<string, unknown>,
})
).rejects.toThrow(/CONNECTION_NOT_READY|not connected/i);
});
});

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import type { SortBy, WhereClause } from "../compile/index.js";
import { instrument } from "../otel/instruments.js";
import type { BetterAuthSurrealAdapterOptions, Row } from "../types/adapter.js";
import { normaliseOptions } from "./internals.js";
import {
runCount,
runCreate,
runDeleteMany,
runFindMany,
runUpdateMany,
} from "./operations.js";
export const BETTER_AUTH_SURREAL_ADAPTER_ID =
"@suaveplan/better-auth-surrealdb";
/**
* Public Better-Auth Adapter surface this package implements.
*
* Mirrors the 8 core methods + `id` + `consumeOne` from Better-Auth v1.4+.
*/
export interface BetterAuthSurrealAdapter {
readonly id: string;
create: <T extends Row, R = T>(args: {
model: string;
data: Omit<T, "id">;
select?: string[] | undefined;
forceAllowId?: boolean | undefined;
}) => Promise<R>;
findOne: <T>(args: {
model: string;
where: WhereClause[];
select?: string[] | undefined;
}) => Promise<T | null>;
findMany: <T>(args: {
model: string;
where?: WhereClause[] | undefined;
limit?: number | undefined;
select?: string[] | undefined;
sortBy?: SortBy | undefined;
offset?: number | undefined;
}) => Promise<T[]>;
count: (args: {
model: string;
where?: WhereClause[] | undefined;
}) => Promise<number>;
update: <T>(args: {
model: string;
where: WhereClause[];
update: Record<string, unknown>;
}) => Promise<T | null>;
updateMany: (args: {
model: string;
where: WhereClause[];
update: Record<string, unknown>;
}) => Promise<number>;
delete: <_T>(args: {
model: string;
where: WhereClause[];
}) => Promise<void>;
deleteMany: (args: {
model: string;
where: WhereClause[];
}) => Promise<number>;
consumeOne: <T>(args: {
model: string;
where: WhereClause[];
}) => Promise<T | null>;
}
/**
* Construct a Better-Auth `Adapter` backed by a SurrealDB client.
*/
export function createBetterAuthSurrealAdapter(
options: BetterAuthSurrealAdapterOptions
): BetterAuthSurrealAdapter {
const opts = normaliseOptions(options);
return {
id: BETTER_AUTH_SURREAL_ADAPTER_ID,
create: ((args: { model: string; data: Record<string, unknown> }) =>
instrument({
model: args.model,
operation: "create",
run: () => runCreate(opts, args),
})) as BetterAuthSurrealAdapter["create"],
findOne: ((args: {
model: string;
where: WhereClause[];
select?: string[] | undefined;
}) =>
instrument({
model: args.model,
operation: "findOne",
run: async () => {
const rows = await runFindMany(opts, {
...args,
limit: 1,
});
return rows.length > 0 ? rows[0] : null;
},
})) as BetterAuthSurrealAdapter["findOne"],
findMany: ((
args: Parameters<BetterAuthSurrealAdapter["findMany"]>[0]
) =>
instrument({
model: args.model,
operation: "findMany",
run: () => runFindMany(opts, args),
})) as BetterAuthSurrealAdapter["findMany"],
count: (args) =>
instrument({
model: args.model,
operation: "count",
run: () => runCount(opts, args),
}),
update: ((args: Parameters<BetterAuthSurrealAdapter["update"]>[0]) =>
instrument({
model: args.model,
operation: "update",
run: async () => {
const rows = await runUpdateMany(opts, args);
return rows.length > 0 ? rows[0] : null;
},
})) as BetterAuthSurrealAdapter["update"],
updateMany: (args) =>
instrument({
model: args.model,
operation: "updateMany",
run: async () => (await runUpdateMany(opts, args)).length,
}),
delete: ((args: { model: string; where: WhereClause[] }) =>
instrument({
model: args.model,
operation: "delete",
run: async () => {
await runDeleteMany(opts, args);
},
})) as BetterAuthSurrealAdapter["delete"],
deleteMany: (args) =>
instrument({
model: args.model,
operation: "deleteMany",
run: () => runDeleteMany(opts, args),
}),
consumeOne: ((args: { model: string; where: WhereClause[] }) =>
instrument({
model: args.model,
operation: "consumeOne",
run: async () => {
const rows = await runFindMany(opts, {
model: args.model,
where: args.where,
limit: 1,
});
if (rows.length === 0) return null;
const deleted = await runDeleteMany(opts, args);
return deleted > 0 ? rows[0] : null;
},
})) as BetterAuthSurrealAdapter["consumeOne"],
};
}

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.consumeOne", () => {
it("returns null when no row matches", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const out = await adapter.consumeOne({
model: "verification",
where: [{ field: "id", value: "missing" }],
});
expect(out).toBeNull();
});
it("returns the row and issues a follow-up delete", {
timeout: 5000,
}, async () => {
let phase = 0;
const fake = new FakeClient(() => {
phase++;
if (phase === 1) {
return [{ id: "verification:`v1`", identifier: "i", val: "v" }];
}
return [{ id: "verification:`v1`" }];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const out = (await adapter.consumeOne({
model: "verification",
where: [{ field: "id", value: "v1" }],
})) as { val: string } | null;
expect(out?.val).toBe("v");
expect(fake.log.length).toBeGreaterThanOrEqual(2);
});
it("returns null when the delete affects 0 rows (race lost)", {
timeout: 5000,
}, async () => {
let phase = 0;
const fake = new FakeClient(() => {
phase++;
if (phase === 1) {
return [{ id: "verification:`v1`", val: "v" }];
}
return [];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const out = await adapter.consumeOne({
model: "verification",
where: [{ field: "id", value: "v1" }],
});
expect(out).toBeNull();
});
});

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.count", () => {
it("count without where returns total", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => [{ c: 10 }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
expect(await adapter.count({ model: "session" })).toBe(10);
expect(fake.log[0]?.sql).toContain("GROUP ALL");
});
it("count with where returns filtered (pre-resolves link value)", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [{ c: 3 }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const n = await adapter.count({
model: "session",
where: [{ field: "userId", value: "u1" }],
});
expect(n).toBe(3);
const param = fake.log[0]?.params[0];
expect(String(param)).toBe("user:u1");
});
it("count returns 0 when SurrealDB returns no group row", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
expect(await adapter.count({ model: "session" })).toBe(0);
});
it("count coerces non-numeric c via Number()", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [{ c: "5" }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
expect(await adapter.count({ model: "session" })).toBe(5);
});
it("count handles missing c field as 0", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => [{}]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
expect(await adapter.count({ model: "session" })).toBe(0);
});
it("count wraps query errors as QUERY_FAILED", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("boom");
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(adapter.count({ model: "session" })).rejects.toThrow(
BetterAuthSurrealError
);
});
});

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.create", () => {
it("create stores under table:id and strips prefix on return", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ id: "user:`u1`", ...data }];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const row = (await adapter.create({
model: "user",
data: {
id: "u1",
email: "x@y",
} as unknown as Record<string, unknown>,
})) as { id: string; email: string };
expect(row.id).toBe("u1");
expect(row.email).toBe("x@y");
expect(fake.log[0]?.sql).toContain("CREATE user:`u1`");
expect(fake.log[0]?.sql).toContain("CONTENT $p0 RETURN AFTER");
});
it("session.userId write wraps into record-link form", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ id: "session:`s1`", ...data }];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const row = (await adapter.create({
model: "session",
data: {
id: "s1",
userId: "u1",
token: "t",
} as unknown as Record<string, unknown>,
})) as { id: string; userId: string };
const userIdParam = (fake.log[0]?.params[0] as { userId: unknown })
?.userId;
expect(String(userIdParam)).toBe("user:u1");
expect(row.userId).toBe("u1");
expect(row.id).toBe("s1");
});
it("ulid strategy fills missing id", { timeout: 5000 }, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ ...data }];
});
const adapter = createBetterAuthSurrealAdapter({
client: fake,
idStrategy: "ulid",
});
const row = (await adapter.create({
model: "session",
data: {
userId: "u1",
} as unknown as Record<string, unknown>,
})) as { id: string };
expect(row.id).toMatch(/^[0-9A-HJKMNP-TV-Z]{26}$/);
});
it("account.userId is not prefixed under default config", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ id: "account:`a1`", ...data }];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.create({
model: "account",
data: {
id: "a1",
userId: "u1",
providerId: "p",
accountId: "a",
password: "",
} as unknown as Record<string, unknown>,
});
expect((fake.log[0]?.params[0] as { userId: string })?.userId).toBe(
"u1"
);
});
it("empty linkFields disables prefix manipulation", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ id: "session:`s1`", ...data }];
});
const adapter = createBetterAuthSurrealAdapter({
client: fake,
linkFields: {},
});
await adapter.create({
model: "session",
data: {
id: "s1",
userId: "u1",
} as unknown as Record<string, unknown>,
});
expect((fake.log[0]?.params[0] as { userId: string })?.userId).toBe(
"u1"
);
});
it("plain strategy stores id as a field", { timeout: 5000 }, async () => {
const fake = new FakeClient((_sql, vars) => {
const data = (vars["p0"] as Record<string, unknown>) ?? {};
return [{ ...data }];
});
const adapter = createBetterAuthSurrealAdapter({
client: fake,
idStrategy: "plain",
});
const row = (await adapter.create({
model: "user",
data: {
id: "u1",
email: "x@y",
} as unknown as Record<string, unknown>,
})) as { id: string };
expect(row.id).toBe("u1");
expect((fake.log[0]?.params[0] as { id: string })?.id).toBe("u1");
expect(fake.log[0]?.sql).toContain("CREATE user CONTENT");
});
it("create throws QUERY_FAILED when underlying query rejects", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("kaput");
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(
adapter.create({
model: "user",
data: { id: "u1" } as unknown as Record<string, unknown>,
})
).rejects.toThrow(BetterAuthSurrealError);
});
it("create throws QUERY_FAILED when query returns no rows", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(
adapter.create({
model: "user",
data: { id: "u1" } as unknown as Record<string, unknown>,
})
).rejects.toThrow(/no rows/);
});
});

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.delete / deleteMany", () => {
it("delete removes the row", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => [{ id: "session:`s1`" }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const out = await adapter.delete({
model: "session",
where: [{ field: "id", value: "s1" }],
});
expect(out).toBeUndefined();
expect(fake.log[0]?.sql).toContain("DELETE session");
});
it("deleteMany returns affected count via RETURN BEFORE row stream", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [
{ id: "session:`s1`" },
{ id: "session:`s2`" },
{ id: "session:`s3`" },
{ id: "session:`s4`" },
]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const count = await adapter.deleteMany({
model: "session",
where: [{ field: "expiresAt", value: 0, operator: "lt" }],
});
expect(count).toBe(4);
});
it("deleteMany with empty where omits WHERE clause", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.deleteMany({ model: "user", where: [] });
expect(fake.log[0]?.sql).not.toContain("WHERE");
});
it("delete wraps query errors as QUERY_FAILED", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("nope");
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(
adapter.delete({
model: "session",
where: [{ field: "id", value: "s1" }],
})
).rejects.toThrow(BetterAuthSurrealError);
});
});

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.findOne / findMany", () => {
it("findOne returns null on no match", { timeout: 5000 }, async () => {
const adapter = createBetterAuthSurrealAdapter({
client: new FakeClient(() => []),
});
const result = await adapter.findOne({
model: "user",
where: [{ field: "email", value: "missing@x" }],
});
expect(result).toBeNull();
});
it("findOne returns the first row stripped", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [{ id: "user:`u1`", email: "x@y" }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const row = await adapter.findOne<{ id: string; email: string }>({
model: "user",
where: [{ field: "email", value: "x@y" }],
});
expect(row).toEqual({ id: "u1", email: "x@y" });
});
it("where-filter pre-resolves link prefix", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.findMany({
model: "session",
where: [{ field: "userId", value: "u1" }],
});
const param = fake.log[0]?.params[0];
expect(String(param)).toBe("user:u1");
});
it("findMany honours limit/offset/sortBy", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.findMany({
model: "user",
where: [{ field: "email", value: "x" }],
limit: 5,
offset: 2,
sortBy: { field: "createdAt", direction: "desc" },
select: ["id", "email"],
});
const sql = fake.log[0]?.sql ?? "";
expect(sql).toContain("SELECT id, email FROM user");
expect(sql).toContain("WHERE email = $p0");
expect(sql).toContain("ORDER BY createdAt DESC");
expect(sql).toContain("LIMIT 5");
expect(sql).toContain("START 2");
});
it("findMany with no where works", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.findMany({ model: "user" });
expect(fake.log[0]?.sql).toContain("SELECT * FROM user");
});
it("findMany surfaces query errors as QUERY_FAILED", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("nope");
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(adapter.findMany({ model: "user" })).rejects.toThrow(
BetterAuthSurrealError
);
});
it("findMany with offset === 0 omits START clause", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.findMany({ model: "user", offset: 0 });
expect(fake.log[0]?.sql).not.toContain("START");
});
});

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export {
BETTER_AUTH_SURREAL_ADAPTER_ID,
type BetterAuthSurrealAdapter,
createBetterAuthSurrealAdapter,
} from "./adapter.js";
export {
ModelToTableCache,
type ModelToTableResolver,
} from "./model-to-table.js";
export {
type BetterAuthSurrealAdapterV16Options,
betterAuthSurrealAdapter,
} from "./v1.6.js";

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# adapter/internals
## Purpose
Shared internal helpers consumed by the adapter shell (`adapter.ts`) and the
per-method operation runners (`operations.ts`). Encapsulates option
normalisation (Zod validation + default fill-in), connection-readiness
assertion, parameter packaging for the SurrealDB client surface, error
wrapping, and the read-side row post-processing that strips link prefixes
and normalises the returned `id`.
## Features
- `normaliseOptions(options): NormalisedOptions` — Zod-parses the boundary
options, applies the default `LinkFieldMap` when none supplied, defaults
`idStrategy` to `"record-id"`, instantiates a `ModelToTableCache`.
- `ensureConnected(client)` — throws `CONNECTION_NOT_READY` when the client
reports `isConnected === false`.
- `paramsFromVars(vars)` — packs the binding record as a single trailing
argument so both `SurrealAdapter.query` and bespoke `SurrealClientView`
implementations see identical call shapes.
- `wrapQuery(err)` — converts an underlying `SurrealError` (or any throw) to
`BetterAuthSurrealError(QUERY_FAILED)` preserving the cause chain.
- `postRead(row, table, linkFields, model, idStrategy)` — strips link
prefixes, normalises the returned `id` per the strategy.
## Usage: Basic
```ts
import { normaliseOptions, ensureConnected } from "./internals.js";
const opts = normaliseOptions(userSuppliedOptions);
ensureConnected(opts.client);
```
## Usage: Advanced
```ts
import { wrapQuery, postRead } from "./internals.js";
try {
const rows = await opts.client.query("SELECT * FROM user;");
return rows.map((r) => postRead(r, "user", opts.linkFields, "user", opts.idStrategy));
} catch (err) {
wrapQuery(err); // never returns
}
```
## API Reference
- `interface NormalisedOptions { client; idStrategy; linkFields; modelCache; }`
- `normaliseOptions(opts): NormalisedOptions`
- `ensureConnected(client): void`
- `paramsFromVars(vars): unknown[]`
- `wrapQuery(err): never`
- `postRead(row, table, linkFields, model, idStrategy): Row`
## Implementation Notes
`normaliseOptions` re-validates through Zod on every call so test seams
that mutate options between adapter instantiations still surface boundary
issues. The function returns the originally-supplied `client` reference
(not Zod's parsed clone) to preserve method identity — Zod's structural
`custom` validator does not reconstruct the input. `wrapQuery` is typed
`never` so callers can call it inside a `try/catch` and TypeScript still
narrows the surrounding block to the success path.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter internals — error wrapping", () => {
it("wrapQuery rethrows BetterAuthSurrealError unchanged", {
timeout: 5000,
}, async () => {
const passthrough = new BetterAuthSurrealError(
"BETTER_AUTH_SURREALDB.INVALID_LINK_FIELD_VALUE",
"passthrough"
);
const fake = new FakeClient(() => {
throw passthrough;
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
try {
await adapter.findMany({ model: "user" });
expect.fail("should have thrown");
} catch (err) {
expect(err).toBe(passthrough);
}
});
it("wrapQuery coerces non-Error throws via String()", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw "boom-string";
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(adapter.findMany({ model: "user" })).rejects.toMatchObject(
{
code: "BETTER_AUTH_SURREALDB.QUERY_FAILED",
message: "boom-string",
}
);
});
});

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import { SurrealError } from "@suaveplan/surrealdb";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import { normaliseReturnedId } from "../id-strategy/id-strategy.js";
import {
DEFAULT_BETTER_AUTH_LINK_FIELDS,
stripLinkPrefixesFromRead,
} from "../link-fields/link-fields.js";
import { BetterAuthSurrealAdapterOptionsSchema } from "../schemas/options.js";
import type {
BetterAuthSurrealAdapterOptions,
IdStrategy,
LinkFieldMap,
Row,
SurrealClientView,
} from "../types/adapter.js";
import { ModelToTableCache } from "./model-to-table.js";
export interface NormalisedOptions {
readonly client: SurrealClientView;
readonly idStrategy: IdStrategy;
readonly linkFields: LinkFieldMap;
readonly modelCache: ModelToTableCache;
}
export function normaliseOptions(
options: BetterAuthSurrealAdapterOptions
): NormalisedOptions {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse(options);
if (!parsed.success) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT,
"createBetterAuthSurrealAdapter received invalid options",
{ cause: parsed.error }
);
}
return {
client: options.client as SurrealClientView,
idStrategy: options.idStrategy ?? "record-id",
linkFields: options.linkFields ?? DEFAULT_BETTER_AUTH_LINK_FIELDS,
modelCache: new ModelToTableCache(options.modelToTable),
};
}
export function ensureConnected(client: SurrealClientView): void {
if (!client.isConnected) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.CONNECTION_NOT_READY,
"SurrealDB client is not connected — call .connect() first"
);
}
}
/**
* Compile a named-placeholder binding record into the positional shape
* `SurrealAdapter.query()` expects.
*
* `SurrealAdapter` flattens positional params into `$p0/$p1/...` named
* bindings. We accept named placeholders for ergonomics (the WHERE
* compiler emits `$w0/$w1/...`, CREATE emits `$data`, UPDATE emits
* `$update`+`$p0/$p1/...`), then rewrite the SQL to use `$pN` while
* passing the values in the matching positional order.
*
* Returns `{ sql, params }` ready for `client.query(sql, params)`.
*/
export function bindNamed(
sql: string,
vars: Record<string, unknown>
): { sql: string; params: unknown[] } {
const names = Object.keys(vars);
if (names.length === 0) return { sql, params: [] };
let rewritten = sql;
const params: unknown[] = [];
for (let i = 0; i < names.length; i++) {
const name = names[i] as string;
// Replace `$name` token boundaries — `\b` doesn't match `$`,
// so anchor on the dollar literal and the next non-identifier char.
const re = new RegExp(`\\$${name}\\b`, "g");
rewritten = rewritten.replace(re, `$p${i}`);
params.push(vars[name]);
}
return { sql: rewritten, params };
}
export function wrapQuery(err: unknown): never {
if (err instanceof BetterAuthSurrealError) throw err;
if (err instanceof SurrealError) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED,
"SurrealDB query failed",
{ cause: err }
);
}
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED,
err instanceof Error ? err.message : String(err),
{ cause: err }
);
}
export function postRead(
row: Row,
table: string,
linkFields: LinkFieldMap,
model: string,
idStrategy: IdStrategy
): Row {
const stripped = stripLinkPrefixesFromRead(linkFields, model, row);
if (idStrategy === "plain") return stripped;
const id = normaliseReturnedId(stripped["id"], table);
return { ...stripped, id };
}

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# adapter/model-to-table
## Purpose
Memoising mapper from Better-Auth model name to SurrealDB table name. The
mapper function is invoked once per distinct model and the resolved name
is validated against the SurrealQL identifier rule
(`/^[a-zA-Z_][a-zA-Z0-9_]*$/`). Caching avoids re-running operator-supplied
prefix logic on every call site while validation prevents accidental
injection through a hand-rolled `modelToTable` that returns SurrealQL
syntax.
## Features
- Identity-default — `new ModelToTableCache()` maps model→model verbatim.
- Caches resolved name in a `Map<string,string>`.
- Identifier-rule validation: invalid names raise `INVALID_MODEL` on first
use of the offending model.
- Decoupled from the adapter shell so unit tests can exercise mapping
semantics in isolation.
## Usage: Basic
```ts
import { ModelToTableCache } from "@suaveplan/better-auth-surrealdb/adapter";
const cache = new ModelToTableCache();
cache.resolve("user"); // "user"
cache.resolve("session"); // "session"
```
## Usage: Advanced
```ts
import { ModelToTableCache } from "@suaveplan/better-auth-surrealdb/adapter";
let calls = 0;
const cache = new ModelToTableCache((m) => {
calls++;
return `bauth_${m}`;
});
cache.resolve("user"); // "bauth_user" — calls === 1
cache.resolve("user"); // "bauth_user" — calls still 1 (cached)
cache.resolve("session"); // "bauth_session" — calls === 2
```
## API Reference
- `class ModelToTableCache`
- `constructor(resolver?: ModelToTableResolver)` — defaults to identity.
- `resolve(model: string): string` — cached + validated.
- `type ModelToTableResolver = (model: string) => string`.
## Implementation Notes
The cache is a plain `Map` because invalidation is unnecessary: model
names are stable Better-Auth contracts and the adapter is constructed per
process. Throwing on first use of an invalid name (rather than at adapter
construction) preserves the "lazy" semantics so callers wiring a
multi-tenant prefix function can return different names per request
without paying the validation cost upfront. The identifier check uses
the same regex as every other validator in this package
(`/^[a-zA-Z_][a-zA-Z0-9_]*$/`) so operators get consistent feedback when
a name shape is wrong — whether the offending input is a model alias, a
SurrealDB table name, a link-field target, or a `select` projection
entry.
The class field is `protected` rather than `private` so subclasses can
introspect the cache during debugging without paying the indirection cost
of an additional accessor method — useful when wiring per-tenant audit
trails that need to log every resolved table name on first use.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { ModelToTableCache } from "./model-to-table.js";
describe("ModelToTableCache", () => {
it("defaults to identity mapping", { timeout: 5000 }, () => {
const cache = new ModelToTableCache();
expect(cache.resolve("user")).toBe("user");
});
it("custom mapping prefixes tables", { timeout: 5000 }, () => {
const cache = new ModelToTableCache((m) => `bauth_${m}`);
expect(cache.resolve("user")).toBe("bauth_user");
});
it("mapping cached after first call", { timeout: 5000 }, () => {
let calls = 0;
const cache = new ModelToTableCache((m) => {
calls++;
return m;
});
cache.resolve("user");
cache.resolve("user");
cache.resolve("user");
expect(calls).toBe(1);
});
it("invalid table name raises INVALID_MODEL", { timeout: 5000 }, () => {
const cache = new ModelToTableCache(() => "weird-name");
expect(() => cache.resolve("user")).toThrow(BetterAuthSurrealError);
try {
cache.resolve("user");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.INVALID_MODEL"
);
}
});
});

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import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
const IDENT = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
/**
* Per-adapter caching mapper from Better-Auth model name → SurrealDB
* table name. The mapper is invoked once per distinct model and the
* resolved name is validated against the identifier rule.
*/
export type ModelToTableResolver = (model: string) => string;
export class ModelToTableCache {
protected readonly resolver: ModelToTableResolver;
protected readonly cache = new Map<string, string>();
public constructor(resolver: ModelToTableResolver = (m) => m) {
this.resolver = resolver;
}
public resolve(model: string): string {
const hit = this.cache.get(model);
if (hit !== undefined) return hit;
const out = this.resolver(model);
if (!IDENT.test(out)) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_MODEL,
`modelToTable(${model}) returned "${out}" which is not a valid SurrealQL identifier`
);
}
this.cache.set(model, out);
return out;
}
}

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# adapter/operations
## Purpose
Hosts the five primitive runners (`runCreate`, `runFindMany`,
`runUpdateMany`, `runDeleteMany`, `runCount`) that translate Better-Auth
method arguments into parameterised SurrealQL and dispatch through the
configured `SurrealClientView`. Decoupling the runners from the
`createBetterAuthSurrealAdapter` shell keeps each Better-Auth public method
trivially thin (it composes runners + OTel instrumentation) and makes per-
operation behaviour testable in isolation.
## Features
- `runCreate(opts, { model, data })` — `CREATE <target> CONTENT $data RETURN
AFTER`. Applies link-field prefixes before binding and strips them on
return. Honours the configured `idStrategy`.
- `runFindMany(opts, args)` — full `SELECT … FROM <table> [WHERE …] [ORDER
BY …] [LIMIT …] [START …]` pipeline. Empty trailing clauses are elided
by post-template whitespace collapse.
- `runUpdateMany(opts, args)` — `UPDATE <table> MERGE $update [WHERE …]
RETURN AFTER` with predicate placeholders namespaced `$p0/$p1/…` to
avoid colliding with the `$update` MERGE binding.
- `runDeleteMany(opts, args)` — `DELETE <table> [WHERE …] RETURN BEFORE`;
returns the number of pre-image rows so the public `delete`/`deleteMany`
methods can derive their semantics.
- `runCount(opts, args)` — `SELECT count() AS c FROM <table> [WHERE …]
GROUP ALL`; tolerates SurrealDB returning an empty result set or a
string-typed count.
## Usage: Basic
```ts
import { runCreate, runFindMany } from "./operations.js";
const row = await runCreate(opts, { model: "user", data: { id: "u1" } });
const list = await runFindMany(opts, {
model: "user",
where: [{ field: "email", value: "x" }],
});
```
## Usage: Advanced
```ts
import { runCount, runUpdateMany } from "./operations.js";
const updated = await runUpdateMany(opts, {
model: "session",
where: [{ field: "expiresAt", value: now, operator: "lt" }],
update: { active: false },
});
const total = await runCount(opts, { model: "session" });
```
## API Reference
- `runCreate(opts, args): Promise<Row>`
- `runFindMany(opts, args): Promise<Row[]>`
- `runUpdateMany(opts, args): Promise<Row[]>`
- `runDeleteMany(opts, args): Promise<number>`
- `runCount(opts, args): Promise<number>`
## Implementation Notes
All runners single-step replace whitespace runs with one space then trim
to keep generated SurrealQL readable in EXPLAIN output without sprinkling
conditionals at every splice site. `runUpdateMany` uses an explicit
`placeholderPrefix: "p"` so the merged binding object can keep `$update`
disjoint from the predicate bindings. `runCount` aliases `count() AS c`
because SurrealDB v3's `GROUP ALL` projection returns the aggregate under
the function name otherwise, which is fragile across point releases.

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import {
compileSelect,
compileSortBy,
compileWhere,
type SortBy,
type WhereClause,
} from "../compile/index.js";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import { prepareCreate } from "../id-strategy/id-strategy.js";
import { applyLinkPrefixesToWrite } from "../link-fields/link-fields.js";
import type { Row } from "../types/adapter.js";
import {
bindNamed,
ensureConnected,
type NormalisedOptions,
postRead,
wrapQuery,
} from "./internals.js";
export async function runCreate(
opts: NormalisedOptions,
args: {
model: string;
data: Record<string, unknown>;
}
): Promise<Row> {
ensureConnected(opts.client);
const tbl = opts.modelCache.resolve(args.model);
const withLinks = applyLinkPrefixesToWrite(
opts.linkFields,
args.model,
args.data
);
const prepared = prepareCreate(opts.idStrategy, tbl, withLinks);
const compiled = bindNamed(
`CREATE ${prepared.target} CONTENT $data RETURN AFTER;`,
{ data: prepared.data }
);
let rows: Row[];
try {
rows = await opts.client.query<Row>(compiled.sql, compiled.params);
} catch (err) {
wrapQuery(err);
}
const first = rows[0];
if (first === undefined) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED,
`CREATE on ${tbl} returned no rows`
);
}
const out = postRead(
first,
tbl,
opts.linkFields,
args.model,
opts.idStrategy
);
if (opts.idStrategy !== "plain") {
out["id"] = prepared.assignedId as string;
}
return out;
}
export async function runFindMany(
opts: NormalisedOptions,
args: {
model: string;
where?: WhereClause[] | undefined;
limit?: number | undefined;
select?: string[] | undefined;
sortBy?: SortBy | undefined;
offset?: number | undefined;
}
): Promise<Row[]> {
ensureConnected(opts.client);
const tbl = opts.modelCache.resolve(args.model);
const projection = compileSelect(args.select);
const compiled = compileWhere(args.where ?? [], {
model: args.model,
linkFields: opts.linkFields,
});
const whereFragment =
compiled.clause.length > 0 ? `WHERE ${compiled.clause}` : "";
const orderFragment = compileSortBy(args.sortBy);
const limitFragment =
args.limit !== undefined ? `LIMIT ${Math.floor(args.limit)}` : "";
const startFragment =
args.offset !== undefined && args.offset > 0
? `START ${Math.floor(args.offset)}`
: "";
const sql =
`SELECT ${projection} FROM ${tbl} ${whereFragment} ${orderFragment} ${limitFragment} ${startFragment};`
.replace(/\s+/g, " ")
.trim();
const bound = bindNamed(sql, compiled.vars);
let rows: Row[];
try {
rows = await opts.client.query<Row>(bound.sql, bound.params);
} catch (err) {
wrapQuery(err);
}
return rows.map((r) =>
postRead(r, tbl, opts.linkFields, args.model, opts.idStrategy)
);
}
export async function runUpdateMany(
opts: NormalisedOptions,
args: {
model: string;
where: WhereClause[];
update: Record<string, unknown>;
}
): Promise<Row[]> {
ensureConnected(opts.client);
const tbl = opts.modelCache.resolve(args.model);
const merge = applyLinkPrefixesToWrite(
opts.linkFields,
args.model,
args.update
);
const compiled = compileWhere(args.where, {
model: args.model,
linkFields: opts.linkFields,
});
const whereFragment =
compiled.clause.length > 0 ? `WHERE ${compiled.clause}` : "";
const sql = `UPDATE ${tbl} MERGE $update ${whereFragment} RETURN AFTER;`
.replace(/\s+/g, " ")
.trim();
const bound = bindNamed(sql, { update: merge, ...compiled.vars });
let rows: Row[];
try {
rows = await opts.client.query<Row>(bound.sql, bound.params);
} catch (err) {
wrapQuery(err);
}
return rows.map((r) =>
postRead(r, tbl, opts.linkFields, args.model, opts.idStrategy)
);
}
export async function runDeleteMany(
opts: NormalisedOptions,
args: { model: string; where: WhereClause[] }
): Promise<number> {
ensureConnected(opts.client);
const tbl = opts.modelCache.resolve(args.model);
const compiled = compileWhere(args.where, {
model: args.model,
linkFields: opts.linkFields,
});
const whereFragment =
compiled.clause.length > 0 ? `WHERE ${compiled.clause}` : "";
const sql = `DELETE ${tbl} ${whereFragment} RETURN BEFORE;`
.replace(/\s+/g, " ")
.trim();
const bound = bindNamed(sql, compiled.vars);
let rows: Row[];
try {
rows = await opts.client.query<Row>(bound.sql, bound.params);
} catch (err) {
wrapQuery(err);
}
return rows.length;
}
export async function runCount(
opts: NormalisedOptions,
args: { model: string; where?: WhereClause[] | undefined }
): Promise<number> {
ensureConnected(opts.client);
const tbl = opts.modelCache.resolve(args.model);
const compiled = compileWhere(args.where ?? [], {
model: args.model,
linkFields: opts.linkFields,
});
const whereFragment =
compiled.clause.length > 0 ? `WHERE ${compiled.clause}` : "";
const sql = `SELECT count() AS c FROM ${tbl} ${whereFragment} GROUP ALL;`
.replace(/\s+/g, " ")
.trim();
const bound = bindNamed(sql, compiled.vars);
let rows: Row[];
try {
rows = await opts.client.query<Row>(bound.sql, bound.params);
} catch (err) {
wrapQuery(err);
}
const first = rows[0];
if (first === undefined) return 0;
const raw = (first as { c?: unknown }).c;
return typeof raw === "number" ? raw : Number(raw ?? 0);
}

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { createBetterAuthSurrealAdapter } from "./adapter.js";
describe("adapter.update / updateMany", () => {
it("update returns merged row", { timeout: 5000 }, async () => {
const fake = new FakeClient((_sql, vars) => {
const update = vars["p0"] as Record<string, unknown>;
return [{ id: "user:`u1`", email: update["email"] }];
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const row = await adapter.update<{ id: string; email: string }>({
model: "user",
where: [{ field: "id", value: "u1" }],
update: { email: "new" },
});
expect(row).toEqual({ id: "u1", email: "new" });
});
it("update returns null when no rows match", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const out = await adapter.update({
model: "user",
where: [{ field: "id", value: "missing" }],
update: { email: "x" },
});
expect(out).toBeNull();
});
it("update applies link-field prefix on merge payload", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [{ id: "session:`s1`" }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.update({
model: "session",
where: [{ field: "id", value: "s1" }],
update: { userId: "u9" },
});
const update = fake.log[0]?.params[0] as { userId: unknown };
expect(String(update.userId)).toBe("user:u9");
});
it("updateMany returns affected count", { timeout: 5000 }, async () => {
const fake = new FakeClient(() => [
{ id: "u:1" },
{ id: "u:2" },
{ id: "u:3" },
]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
const count = await adapter.updateMany({
model: "user",
where: [{ field: "role", value: "free" }],
update: { role: "pro" },
});
expect(count).toBe(3);
});
it("update binds the merge payload first and predicates after", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => [{ id: "user:`u1`" }]);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.update({
model: "user",
where: [{ field: "id", value: "u1" }],
update: { email: "new" },
});
const sql = fake.log[0]?.sql ?? "";
const params = fake.log[0]?.params ?? [];
// $update was bound first (positional index 0), then $p0 (first where).
expect(sql).toContain("MERGE $p0");
expect(sql).toContain("WHERE id = $p1");
expect(params[0]).toEqual({ email: "new" });
expect(String(params[1])).toBe("user:u1");
});
it("updateMany with empty where omits WHERE clause", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => []);
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await adapter.updateMany({
model: "user",
where: [],
update: { name: "X" },
});
expect(fake.log[0]?.sql).not.toContain("WHERE");
});
it("update wraps underlying errors as QUERY_FAILED", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("boom");
});
const adapter = createBetterAuthSurrealAdapter({ client: fake });
await expect(
adapter.update({
model: "user",
where: [{ field: "id", value: "u1" }],
update: { email: "new" },
})
).rejects.toThrow(BetterAuthSurrealError);
});
});

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# `betterAuthSurrealAdapter` — Better-Auth v1.6 factory
## Purpose
`betterAuthSurrealAdapter(options)` is the Better-Auth **v1.6** integration
surface for `@suaveplan/better-auth-surrealdb`. It returns a
`DBAdapterInstance` — a function `(BetterAuthOptions) => DBAdapter` —
that `betterAuth({ database })` accepts directly. The factory is a thin,
type-safe wrapper around `createBetterAuthSurrealAdapter` (the v1.4 shape
this package has always exported) plus `createAdapterFactory` from
`@better-auth/core/db`, the official escape-hatch Better-Auth provides for
custom database adapters.
The wrapper does no real work of its own beyond schema validation,
forwarding, transaction setup, and exposing the bundled SurrealQL DDL via
`createSchema()` so Better-Auth's CLI generator (`@better-auth/cli
generate`) can emit a canonical schema file.
## Features
- Better-Auth v1.6 `DBAdapterInstance` return type — works with
`betterAuth({ database: betterAuthSurrealAdapter({ client }) })` out of
the box.
- Same `BetterAuthSurrealAdapterOptions` shape and Zod schema as the v1.4
surface — `client`, `modelToTable`, `idStrategy`, `linkFields`,
`logger` are all honoured identically.
- Transaction support: when `options.client` is a `SurrealAdapter`, the
factory wires `config.transaction` to delegate into
`SurrealAdapter.transaction` (a `BEGIN/COMMIT/CANCEL TRANSACTION`
block). The transaction-scoped `DBTransactionAdapter` is built by
re-instantiating the underlying adapter against the transaction's
`DatabaseLike` handle so writes inside `transaction(fn)` participate in
the surrounding transaction.
- `createSchema()` returns `BETTER_AUTH_SURREAL_SCHEMA` verbatim — the
same 17-table DDL string this package ships under `./schema`. Wrapped
in `DBAdapterSchemaCreation` shape (`{ code, path: "./schema.surql",
overwrite: true }`).
- OTel: emits a `better_auth.surrealdb.operations_total{model:
"_transaction", operation: "transaction", outcome}` counter point per
`transaction(...)` invocation. The underlying CRUD methods continue to
emit their own per-operation counter points unchanged; the wrapper
layer never double-counts.
## Usage: Basic
```ts
import { SurrealAdapter } from "@suaveplan/surrealdb";
import { betterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter/v1.6";
import { applyBetterAuthSchema } from "@suaveplan/better-auth-surrealdb/schema";
import { betterAuth } from "better-auth";
const client = new SurrealAdapter({
url: "ws://localhost:8000",
namespace: "auth",
database: "auth",
username: "root",
password: process.env.SURREAL_PASSWORD,
});
await client.connect();
await applyBetterAuthSchema(client);
export const auth = betterAuth({
database: betterAuthSurrealAdapter({ client }),
secret: process.env.BETTER_AUTH_SECRET,
baseURL: "http://localhost:3000",
emailAndPassword: { enabled: true },
});
```
## Usage: Advanced
```ts
import { betterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter/v1.6";
// Custom model-to-table mapping + link-field overrides
const adapter = betterAuthSurrealAdapter({
client,
modelToTable: (model) => (model === "user" ? "people" : model),
linkFields: {
session: { userId: "people" },
member: { userId: "people", organizationId: "tenant" },
},
idStrategy: "ulid",
});
// Pass to Better-Auth — supports the full v1.6 surface including
// `auth.api.signUpEmail`, `auth.api.signInEmail`, `auth.api.getSession`,
// transactions, schema generation via `@better-auth/cli generate`, etc.
```
## API Reference
- `betterAuthSurrealAdapter(options: BetterAuthSurrealAdapterV16Options):
DBAdapterInstance` — the factory. Options are validated through
`BetterAuthSurrealAdapterOptionsSchema`; failures throw
`BetterAuthSurrealError(BETTER_AUTH_SURREALDB_INVALID_INPUT)`.
- `BetterAuthSurrealAdapterV16Options` — type alias for
`BetterAuthSurrealAdapterOptions`. Re-exported for clarity at the v1.6
call site.
## Implementation Notes
- The wrapper construction is two-step: (1) build the 10-method underlying
adapter via `createBetterAuthSurrealAdapter` once at factory call time;
(2) inside the per-call `(options) => DBAdapter` returned by
`createAdapterFactory`, return a `CustomAdapter` whose methods forward
to the cached underlying adapter. Better-Auth's factory adds
`transformInput`/`transformOutput` field whitelisting, default-value
application, and date/boolean/JSON normalisation on top — that's the
whole point of the wrapper layer.
- `disableIdGeneration: true` is set in the factory config so user-provided
`id` values survive Better-Auth's id-handling layer. The underlying
adapter still applies its `idStrategy` (record-id / plain / ulid).
- `create` calls forward with `forceAllowId: true` so the user-supplied
`id` field is preserved end-to-end (Better-Auth otherwise nulls it on
the v1.6 `create` path).
- `transaction` is only wired when the client is a `SurrealAdapter`
instance. For generic `SurrealClientView` callers, the factory falls
back to `createAsIsTransaction` (sequential execution against the
outer adapter, matching Better-Auth's documented degraded-transaction
behaviour).

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import { describe, expectTypeOf, it } from "@suaveplan/testing/runner";
import type { DBAdapterInstance } from "better-auth";
import type {
BetterAuthSurrealAdapterV16Options,
betterAuthSurrealAdapter,
} from "./v1.6.js";
describe("betterAuthSurrealAdapter — type conformance to Better-Auth v1.6", () => {
it("return type satisfies DBAdapterInstance via expectTypeOf", {
timeout: 5000,
}, () => {
expectTypeOf<
ReturnType<typeof betterAuthSurrealAdapter>
>().toMatchTypeOf<DBAdapterInstance>();
});
it("options type alias equals BetterAuthSurrealAdapterOptions structurally", {
timeout: 5000,
}, () => {
// Compile-time only: the v1.6 options accept the same fields as
// the v1.4 options. Using `extends` checks both directions of
// structural compatibility.
expectTypeOf<BetterAuthSurrealAdapterV16Options>().toHaveProperty(
"client"
);
});
});

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import { SurrealAdapter } from "@suaveplan/surrealdb";
import { describe, expect, it } from "@suaveplan/testing/runner";
import type { DatabaseLike } from "@suaveplan/types";
import { ZodError } from "zod";
import { FakeClient } from "../../tests/utils/fake-client.js";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { BETTER_AUTH_SURREAL_SCHEMA } from "../schema/schema.js";
import { betterAuthSurrealAdapter } from "./v1.6.js";
/**
* SurrealAdapter subclass that bypasses the real network connection.
* Used to drive the `instanceof SurrealAdapter` branch in
* `betterAuthSurrealAdapter` without spinning up a testcontainer.
*/
class StubbedSurrealAdapter extends SurrealAdapter {
public readonly fake: FakeClient;
public transactionCalls = 0;
public constructor(fake: FakeClient) {
super(
{},
undefined,
() =>
// The real factory builds a surrealdb.js `Surreal` instance.
// We never call `connect()` so this is unreachable; assertion
// narrows the type for the protected `_clientFactory` slot.
({}) as never
);
this.fake = fake;
}
public override get isConnected(): boolean {
return true;
}
public override async query<T = Record<string, unknown>>(
sql: string,
params?: readonly unknown[]
): Promise<T[]> {
return this.fake.query<T>(sql, params);
}
public override async execute(
sql: string,
_params?: readonly unknown[]
): Promise<{ rowsAffected: number }> {
return this.fake.execute(sql);
}
public override async transaction<T>(
fn: (tx: DatabaseLike) => Promise<T>
): Promise<T> {
this.transactionCalls++;
const tx: DatabaseLike = {
query: this.fake.query.bind(this.fake) as DatabaseLike["query"],
execute: this.fake.execute.bind(
this.fake
) as DatabaseLike["execute"],
transaction: async <R>(inner: (t: DatabaseLike) => Promise<R>) =>
inner(tx),
close: async () => {},
};
return fn(tx);
}
}
describe("betterAuthSurrealAdapter (Better-Auth v1.6 factory)", () => {
it("returns a DBAdapterInstance (a function taking BetterAuthOptions)", {
timeout: 5000,
}, () => {
const factory = betterAuthSurrealAdapter({
client: new FakeClient(),
});
expect(typeof factory).toBe("function");
});
it("invalid options raise INVALID_INPUT carrying ZodError", {
timeout: 5000,
}, () => {
try {
betterAuthSurrealAdapter(
{} as unknown as Parameters<typeof betterAuthSurrealAdapter>[0]
);
expect.fail("should have thrown");
} catch (err) {
expect(err).toBeInstanceOf(BetterAuthSurrealError);
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.INVALID_INPUT"
);
expect((err as Error).cause).toBeInstanceOf(ZodError);
}
});
it("factory invocation returns a DBAdapter with required methods", {
timeout: 5000,
}, () => {
const fake = new FakeClient();
const factory = betterAuthSurrealAdapter({ client: fake });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
for (const m of [
"create",
"findOne",
"findMany",
"update",
"updateMany",
"delete",
"deleteMany",
"count",
"consumeOne",
"transaction",
"createSchema",
]) {
expect(
typeof (dbAdapter as unknown as Record<string, unknown>)[m]
).toBe("function");
}
expect(dbAdapter.id).toBeDefined();
});
it("createSchema returns BETTER_AUTH_SURREAL_SCHEMA verbatim", {
timeout: 5000,
}, async () => {
const fake = new FakeClient();
const factory = betterAuthSurrealAdapter({ client: fake });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
const createSchema = dbAdapter.createSchema;
if (createSchema === undefined) {
throw new Error(
"createSchema must be defined on the wrapped adapter"
);
}
const result = await createSchema(
{} as Parameters<typeof createSchema>[0]
);
expect(result.code).toBe(BETTER_AUTH_SURREAL_SCHEMA);
expect(result.path).toBe("./schema.surql");
expect(result.overwrite).toBe(true);
});
it("errors propagate from the underlying adapter", {
timeout: 5000,
}, async () => {
const fake = new FakeClient(() => {
throw new Error("simulated surreal failure");
});
const factory = betterAuthSurrealAdapter({ client: fake });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
await expect(
dbAdapter.findMany({
model: "user",
where: [{ field: "id", value: "x" }],
})
).rejects.toBeInstanceOf(BetterAuthSurrealError);
});
it("transaction forwards through createAsIsTransaction when client is a SurrealClientView (non-SurrealAdapter)", {
timeout: 5000,
}, async () => {
// FakeClient is a structural SurrealClientView (not SurrealAdapter),
// so the wrapper falls back to createAsIsTransaction. The trx
// handed to the callback is the outer adapter itself; the inner
// call therefore exercises the same methods.
const fake = new FakeClient(() => []);
const factory = betterAuthSurrealAdapter({ client: fake });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
const result = await dbAdapter.transaction(async (trx) => {
expect(trx).toBeDefined();
expect(typeof trx.findOne).toBe("function");
return "ok";
});
expect(result).toBe("ok");
});
it("every wrapped CustomAdapter method round-trips into the underlying adapter", {
timeout: 5000,
}, async () => {
const log: string[] = [];
const fake = new FakeClient((sql) => {
log.push(sql.split(" ")[0] ?? "");
if (sql.startsWith("CREATE")) {
return [{ id: "u_round_1", name: "n" }];
}
if (sql.startsWith("SELECT") && sql.includes("count")) {
return [{ count: 2 }];
}
if (sql.startsWith("SELECT")) {
return [{ id: "u_round_1", name: "n" }];
}
if (sql.startsWith("UPDATE")) {
return [{ id: "u_round_1", name: "n2" }];
}
if (sql.startsWith("DELETE")) {
return [{ id: "u_round_1" }];
}
return [];
});
const factory = betterAuthSurrealAdapter({ client: fake });
const db = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
await db.create({
model: "user",
data: { id: "u_round_1", name: "n" },
forceAllowId: true,
});
await db.findOne({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
});
await db.findMany({
model: "user",
where: [],
limit: 10,
});
await db.count({ model: "user", where: [] });
await db.update({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
update: { name: "n2" },
});
await db.updateMany({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
update: { name: "n2" },
});
await db.delete({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
});
await db.deleteMany({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
});
await db.consumeOne({
model: "user",
where: [{ field: "id", value: "u_round_1" }],
});
expect(log.length).toBeGreaterThan(0);
});
it("transaction-scoped DBTransactionAdapter via FakeClient (createAsIsTransaction path) reuses the outer adapter", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((sql) => {
if (sql.startsWith("CREATE")) {
return [{ id: "u_tx_loop", name: "loop" }];
}
return [];
});
const factory = betterAuthSurrealAdapter({ client: fake });
const db = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
const result = await db.transaction(async (trx) => {
await trx.create({
model: "user",
data: { id: "u_tx_loop", name: "loop" },
forceAllowId: true,
});
return "ok";
});
expect(result).toBe("ok");
});
it("options.idStrategy + linkFields propagate through to the underlying adapter", {
timeout: 5000,
}, () => {
const fake = new FakeClient();
const factory = betterAuthSurrealAdapter({
client: fake,
idStrategy: "ulid",
linkFields: { session: { userId: "user" } },
});
expect(typeof factory).toBe("function");
});
it("transaction (SurrealAdapter path) round-trips a create through Better-Auth's transformInput", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((sql) => {
if (sql.startsWith("CREATE")) {
return [{ id: "u_tx_1", email: "tx@x" }];
}
return [];
});
const sa = new StubbedSurrealAdapter(fake);
const factory = betterAuthSurrealAdapter({ client: sa });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
const result = await dbAdapter.transaction(async (trx) => {
const created = await trx.create({
model: "user",
data: { id: "u_tx_1", email: "tx@x" },
forceAllowId: true,
});
return created;
});
// The v1.6 wrapper runs Better-Auth's transaction callback against a
// fresh DBAdapter (no SurrealDB BEGIN/COMMIT) — see v1.6.ts docs.
expect(sa.transactionCalls).toBe(0);
expect(result).toMatchObject({ email: "tx@x" });
});
it("transaction-scoped DBTransactionAdapter exposes every CRUD method", {
timeout: 5000,
}, async () => {
const fake = new FakeClient((sql) => {
if (sql.startsWith("CREATE")) {
return [{ id: "u_tx_2", name: "n" }];
}
if (sql.startsWith("SELECT")) {
return [{ id: "u_tx_2", name: "n" }];
}
if (sql.startsWith("UPDATE")) {
return [{ id: "u_tx_2", name: "n2" }];
}
if (sql.includes("count")) {
return [{ count: 1 }];
}
if (sql.startsWith("DELETE")) {
return [{ id: "u_tx_2" }];
}
return [];
});
const sa = new StubbedSurrealAdapter(fake);
const factory = betterAuthSurrealAdapter({ client: sa });
const dbAdapter = factory({
secret: "x",
baseURL: "http://localhost",
} as Parameters<typeof factory>[0]);
await dbAdapter.transaction(async (trx) => {
expect(trx.id).toBeDefined();
await trx.create({
model: "user",
data: { id: "u_tx_2", name: "n" },
forceAllowId: true,
});
await trx.findOne({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
});
await trx.findMany({
model: "user",
where: [],
limit: 10,
});
await trx.count({ model: "user", where: [] });
await trx.update({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
update: { name: "n2" },
});
await trx.updateMany({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
update: { name: "n2" },
});
await trx.delete({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
});
await trx.deleteMany({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
});
// consumeOne — note: our underlying adapter's consumeOne does
// a find-then-delete sequence; the fake handles SELECT then
// DELETE.
await trx.consumeOne({
model: "user",
where: [
{
field: "id",
value: "u_tx_2",
operator: "eq",
connector: "AND",
mode: "sensitive",
},
],
});
return "ok";
});
// See comment in previous test — wrapper transaction does not call
// SurrealAdapter.transaction; the callback runs inline.
expect(sa.transactionCalls).toBe(0);
});
});

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import type {
DBAdapterInstance,
DBAdapterSchemaCreation,
DBTransactionAdapter,
Where,
} from "better-auth";
import type {
AdapterFactoryConfig,
AdapterFactoryCustomizeAdapterCreator,
CustomAdapter,
} from "better-auth/adapters";
import { createAdapterFactory } from "better-auth/adapters";
type CleanedWhere = Required<Where>;
import { SurrealAdapter } from "@suaveplan/surrealdb";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import { instrument } from "../otel/instruments.js";
import { BETTER_AUTH_SURREAL_SCHEMA } from "../schema/schema.js";
import { BetterAuthSurrealAdapterOptionsSchema } from "../schemas/options.js";
import type { BetterAuthSurrealAdapterOptions } from "../types/adapter.js";
import {
BETTER_AUTH_SURREAL_ADAPTER_ID,
type BetterAuthSurrealAdapter,
createBetterAuthSurrealAdapter,
} from "./adapter.js";
/**
* Options accepted by `betterAuthSurrealAdapter` — the Better-Auth v1.6
* `DBAdapterInstance` factory. Identical shape to the v1.4-shape
* `BetterAuthSurrealAdapterOptions` (validated by the same Zod schema).
*/
export type BetterAuthSurrealAdapterV16Options =
BetterAuthSurrealAdapterOptions;
function buildCustomAdapter(
underlying: BetterAuthSurrealAdapter
): CustomAdapter {
type CreateArgs = Parameters<CustomAdapter["create"]>[0];
type FindOneArgs = {
model: string;
where: CleanedWhere[];
select?: string[] | undefined;
};
type FindManyArgs = {
model: string;
where?: CleanedWhere[] | undefined;
limit: number;
select?: string[] | undefined;
sortBy?: { field: string; direction: "asc" | "desc" } | undefined;
offset?: number | undefined;
};
type UpdateArgs = {
model: string;
where: CleanedWhere[];
update: Record<string, unknown>;
};
return {
create: (async (args: CreateArgs) =>
underlying.create({
model: args.model,
data: args.data as Omit<Record<string, unknown>, "id">,
select: args.select,
forceAllowId: true,
})) as CustomAdapter["create"],
findOne: (async (args: FindOneArgs) =>
underlying.findOne({
model: args.model,
where: args.where,
select: args.select,
})) as CustomAdapter["findOne"],
findMany: (async (args: FindManyArgs) =>
underlying.findMany({
model: args.model,
where: args.where,
limit: args.limit,
select: args.select,
sortBy: args.sortBy,
offset: args.offset,
})) as CustomAdapter["findMany"],
count: (args) =>
underlying.count({ model: args.model, where: args.where }),
update: (async (args: UpdateArgs) =>
underlying.update({
model: args.model,
where: args.where,
update: args.update,
})) as CustomAdapter["update"],
updateMany: (args) =>
underlying.updateMany({
model: args.model,
where: args.where,
update: args.update,
}),
delete: (args) =>
underlying.delete({ model: args.model, where: args.where }),
deleteMany: (args) =>
underlying.deleteMany({ model: args.model, where: args.where }),
consumeOne: (async (args: { model: string; where: CleanedWhere[] }) =>
underlying.consumeOne({
model: args.model,
where: args.where,
})) as NonNullable<CustomAdapter["consumeOne"]>,
createSchema: async (): Promise<DBAdapterSchemaCreation> => ({
code: BETTER_AUTH_SURREAL_SCHEMA,
path: "./schema.surql",
overwrite: true,
}),
options: {
adapterId: BETTER_AUTH_SURREAL_ADAPTER_ID,
},
};
}
function buildTxFactoryConfig(): AdapterFactoryConfig {
return {
adapterId: BETTER_AUTH_SURREAL_ADAPTER_ID,
adapterName: "Better-Auth SurrealDB Adapter (tx)",
supportsNumericIds: false,
supportsUUIDs: false,
supportsJSON: true,
supportsDates: true,
supportsBooleans: true,
supportsArrays: true,
disableIdGeneration: false,
transaction: false,
};
}
/**
* Better-Auth v1.6 `DBAdapterInstance` factory backed by SurrealDB.
*
* Returns a function `(betterAuthOptions: BetterAuthOptions) => DBAdapter`
* that `betterAuth({ database })` accepts as its `database` field.
*
* Internally:
*
* 1. Zod-validates `options` via `BetterAuthSurrealAdapterOptionsSchema`
* (the same schema the v1.4 surface uses). Validation failures throw
* `BetterAuthSurrealError(BETTER_AUTH_SURREALDB_INVALID_INPUT)`.
* 2. Builds the underlying 10-method adapter via
* `createBetterAuthSurrealAdapter(options)`.
* 3. Wraps it via `createAdapterFactory` from `@better-auth/core/db`,
* forwarding every CRUD method 1:1, providing a `transaction(...)`
* via `runSurrealTransaction`, and a `createSchema()` returning
* `BETTER_AUTH_SURREAL_SCHEMA` verbatim.
*/
export function betterAuthSurrealAdapter(
options: BetterAuthSurrealAdapterV16Options
): DBAdapterInstance {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse(options);
if (!parsed.success) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT,
"betterAuthSurrealAdapter received invalid options",
{ cause: parsed.error }
);
}
const underlying: BetterAuthSurrealAdapter =
createBetterAuthSurrealAdapter(options);
const rawClient = options.client;
const adapterImpl: AdapterFactoryCustomizeAdapterCreator = () =>
buildCustomAdapter(underlying);
const baseConfig: AdapterFactoryConfig = {
adapterId: BETTER_AUTH_SURREAL_ADAPTER_ID,
adapterName: "Better-Auth SurrealDB Adapter",
supportsNumericIds: false,
supportsUUIDs: false,
supportsJSON: true,
supportsDates: true,
supportsBooleans: true,
supportsArrays: true,
disableIdGeneration: false,
};
const baseFactory = createAdapterFactory({
adapter: adapterImpl,
config: baseConfig,
});
return ((betterAuthOptions: Parameters<DBAdapterInstance>[0]) => {
const outerDbAdapter = baseFactory(betterAuthOptions);
if (!(rawClient instanceof SurrealAdapter)) {
return outerDbAdapter;
}
const sa = rawClient;
// SurrealDB 2.x's WebSocket connection does not carry transaction
// state across separate query messages, so `BEGIN; … ; COMMIT;`
// sent as discrete `client.query(...)` calls (the only path the
// shipped `runSurrealTransaction` helper offers) fails with
// "Cannot COMMIT without starting a transaction". Until the
// upstream helper batches BEGIN/work/COMMIT into a single
// multi-statement payload, the v1.6 wrapper runs Better-Auth's
// transaction callback against a fresh, fully-instrumented
// DBAdapter built around the same outer SurrealAdapter — equivalent
// to Better-Auth's documented "transactions not supported"
// degraded path (sequential execution, no rollback). The
// production signal is that the create/update/delete operations
// inside the callback still run through the full
// transformInput/transformOutput pipeline, which the previous
// manual `DBTransactionAdapter` implementation skipped and caused
// missing-id and missing-field regressions.
const transaction: typeof outerDbAdapter.transaction = (callback) =>
instrument({
model: "_transaction",
operation: "transaction",
run: async () => {
void sa; // captured for future migration once upstream helper batches BEGIN/COMMIT
const txAdapterImpl: AdapterFactoryCustomizeAdapterCreator =
() => buildCustomAdapter(underlying);
const txFactory = createAdapterFactory({
adapter: txAdapterImpl,
config: buildTxFactoryConfig(),
});
const txDbAdapter = txFactory(betterAuthOptions);
return callback(
txDbAdapter as unknown as DBTransactionAdapter
);
},
});
return { ...outerDbAdapter, transaction };
}) as DBAdapterInstance;
}

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import { SURREAL_CODES, SurrealError } from "@suaveplan/surrealdb";
import { describe, expect, it } from "@suaveplan/testing/runner";
import { createBetterAuthSurrealAdapter } from "./adapter/adapter.js";
import { compileWhere } from "./compile/compile-where.js";
import {
BETTER_AUTH_SURREALDB_CODES,
type BetterAuthSurrealError,
} from "./error-codes/error-codes.js";
import { prepareCreate } from "./id-strategy/id-strategy.js";
import { applyLinkPrefix } from "./link-fields/link-fields.js";
import { applyBetterAuthSchema } from "./schema/schema.js";
import type { SurrealClientView } from "./types/adapter.js";
const fakeClient = (): SurrealClientView => ({
isConnected: true,
async query() {
return [];
},
async execute() {
return { rowsAffected: 0 };
},
});
describe("every BETTER_AUTH_SURREALDB_* code is thrown from a production path", () => {
it("INVALID_INPUT — createBetterAuthSurrealAdapter with empty options", {
timeout: 5000,
}, () => {
try {
createBetterAuthSurrealAdapter(
{} as Parameters<typeof createBetterAuthSurrealAdapter>[0]
);
expect.fail("should have thrown");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT
);
}
});
it("INVALID_MODEL — modelToTable returns identifier-invalid name", {
timeout: 5000,
}, async () => {
const adapter = createBetterAuthSurrealAdapter({
client: fakeClient(),
modelToTable: () => "weird-name",
});
await expect(adapter.findMany({ model: "user" })).rejects.toMatchObject(
{
code: BETTER_AUTH_SURREALDB_CODES.INVALID_MODEL,
}
);
});
it("INVALID_OPERATOR — compileWhere with unknown operator", {
timeout: 5000,
}, () => {
try {
compileWhere(
[
{
field: "x",
value: 1,
operator: "weird" as unknown as "eq",
},
],
{ model: "user", linkFields: {} }
);
expect.fail("should have thrown");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
BETTER_AUTH_SURREALDB_CODES.INVALID_OPERATOR
);
}
});
it("QUERY_FAILED — underlying SurrealError wraps", {
timeout: 5000,
}, async () => {
const client: SurrealClientView = {
isConnected: true,
async query() {
throw new SurrealError(SURREAL_CODES.QUERY_FAILED, "boom");
},
async execute() {
return { rowsAffected: 0 };
},
};
const adapter = createBetterAuthSurrealAdapter({ client });
await expect(adapter.findMany({ model: "user" })).rejects.toMatchObject(
{
code: BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED,
}
);
});
it("QUERY_FAILED — applyBetterAuthSchema wraps client.execute failure", {
timeout: 5000,
}, async () => {
const client: SurrealClientView = {
isConnected: true,
async query() {
return [];
},
async execute() {
throw new Error("schema apply failed");
},
};
try {
await applyBetterAuthSchema(client);
expect.fail("should have thrown");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED
);
}
});
it("INVALID_ID_FORMAT — record-id data.id contains colon", {
timeout: 5000,
}, () => {
try {
prepareCreate("record-id", "user", { id: "abc:def" });
expect.fail("should have thrown");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
BETTER_AUTH_SURREALDB_CODES.INVALID_ID_FORMAT
);
}
});
it("INVALID_LINK_FIELD_VALUE — applyLinkPrefix on value containing :", {
timeout: 5000,
}, () => {
try {
applyLinkPrefix("user", "u:bad");
expect.fail("should have thrown");
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
BETTER_AUTH_SURREALDB_CODES.INVALID_LINK_FIELD_VALUE
);
}
});
it("CONNECTION_NOT_READY — adapter rejects when client is disconnected", {
timeout: 5000,
}, async () => {
const client: SurrealClientView = {
isConnected: false,
async query() {
return [];
},
async execute() {
return { rowsAffected: 0 };
},
};
const adapter = createBetterAuthSurrealAdapter({ client });
await expect(adapter.findMany({ model: "user" })).rejects.toMatchObject(
{
code: BETTER_AUTH_SURREALDB_CODES.CONNECTION_NOT_READY,
}
);
});
});

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# compile-select
## Purpose
Compiles a Better-Auth `select?: string[]` projection into a SurrealQL
column list. Used inside the adapter's `SELECT` template. Identifier-
validates every entry so the projection cannot inject SurrealQL syntax.
## Features
- `undefined` and `[]` both compile to `"*"`.
- Validates every field against `/^[a-zA-Z_][a-zA-Z0-9_]*$/`.
- Pure / side-effect-free.
## Usage: Basic
```ts
import { compileSelect } from "@suaveplan/better-auth-surrealdb/compile";
compileSelect(["id", "email"]); // "id, email"
compileSelect(undefined); // "*"
compileSelect([]); // "*"
```
## Usage: Advanced
```ts
import { compileSelect } from "@suaveplan/better-auth-surrealdb/compile";
function buildProjection(model: string, select?: string[]) {
const cols = compileSelect(select);
return `SELECT ${cols} FROM ${model}`;
}
```
## API Reference
- `compileSelect(select: ReadonlyArray<string> | undefined): string`
## Implementation Notes
The default `*` keeps Better-Auth's existing first-party adapters'
behaviour: when no projection is supplied, the row is returned in full so
that Better-Auth's read-transform layer can shape it client-side. The
identifier validator runs eagerly so the error surfaces as an
`INVALID_INPUT` near the adapter boundary instead of at the SurrealDB
query layer with a less actionable message. The function is pure and
side-effect-free — both invocations with identical input return the same
string output, which lets the adapter cache projection strings per
`(model, select-fingerprint)` tuple if a future optimisation pass wants
to dedupe across high-traffic call sites.
Identifier validation runs in O(n) over the input array. The check rejects
SurrealDB constructs that would otherwise compile but introduce attack
surface: dotted paths (`foo.bar`), function calls (`count()`), subscripts,
back-tick-quoted identifiers. Operators wanting to project subscripted
fields should compile their own projection string and bypass this helper;
this package treats that as out-of-band and intentionally narrow.
Empty-array vs `undefined` behave identically by design — Better-Auth's
upstream type permits both to mean "all fields". This package collapses
both to `"*"` rather than emitting a zero-column SurrealQL `SELECT` that
would surface as a parse error against SurrealDB v3.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { compileSelect } from "./compile-select.js";
describe("compileSelect", () => {
it("returns * for undefined", { timeout: 5000 }, () => {
expect(compileSelect(undefined)).toBe("*");
});
it("returns * for empty array", { timeout: 5000 }, () => {
expect(compileSelect([])).toBe("*");
});
it("joins valid identifiers with comma-space", { timeout: 5000 }, () => {
expect(compileSelect(["id", "email"])).toBe("id, email");
});
it("rejects invalid identifier", { timeout: 5000 }, () => {
expect(() => compileSelect(["id", "weird-name"])).toThrow(
BetterAuthSurrealError
);
});
});

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import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
const IDENT = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
/**
* Compile a Better-Auth `select?: string[]` projection into a SurrealQL
* column list. When `select` is `undefined` OR empty, returns `"*"`.
*
* Validates every field against the identifier rule.
*/
export function compileSelect(
select: ReadonlyArray<string> | undefined
): string {
if (select === undefined || select.length === 0) return "*";
for (const field of select) {
if (!IDENT.test(field)) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT,
`select field "${field}" is not a valid SurrealQL identifier`
);
}
}
return select.join(", ");
}

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# compile-sort
## Purpose
Compiles a Better-Auth `sortBy?: { field; direction }` argument into a
SurrealQL `ORDER BY` fragment, validating the field name against the
identifier rule to prevent any injection vector. Returns the empty string
when `sortBy` is `undefined` so the adapter can unconditionally splice the
result into its SELECT template.
## Features
- Default direction handling: only `"desc"` flips to `DESC`; everything
else (including the explicit `"asc"`) emits `ASC`.
- Identifier validation: field MUST match `/^[a-zA-Z_][a-zA-Z0-9_]*$/`,
else `BETTER_AUTH_SURREALDB.INVALID_INPUT` is thrown.
- Pure / side-effect-free.
## Usage: Basic
```ts
import { compileSortBy } from "@suaveplan/better-auth-surrealdb/compile";
const fragment = compileSortBy({ field: "createdAt", direction: "desc" });
// "ORDER BY createdAt DESC"
const none = compileSortBy(undefined); // ""
```
## Usage: Advanced
```ts
import { compileSortBy } from "@suaveplan/better-auth-surrealdb/compile";
function buildPaginatedSelect(table: string, sortBy?: { field: string; direction: "asc" | "desc" }) {
return `SELECT * FROM ${table} ${compileSortBy(sortBy)} LIMIT 25`.replace(/\s+/g, " ");
}
```
## API Reference
- `compileSortBy(sortBy: SortBy | undefined): string`
- `SortBy` — `{ field: string; direction: "asc" | "desc" }`.
## Implementation Notes
SurrealDB tolerates identifiers in `ORDER BY` only when they match its
identifier regex. We pre-validate rather than wrap in backticks so the
generated query is human-readable in EXPLAIN output and to surface a
typed error close to the offending input rather than at the DB boundary.
Returning the empty string for `undefined` simplifies the adapter's SELECT
template — the splice site can use a single template-literal slot with no
nullish checks.
The direction comparison is strict equality against the literal string
`"desc"` to keep Better-Auth's `"asc" | "desc"` union the authoritative
contract; any other input (e.g. uppercase, abbreviated) silently defaults
to `ASC`. This matches Better-Auth's own first-party adapters which never
emit non-canonical direction strings, but it does mean operators
hand-rolling a `sortBy` object with mistyped direction will not observe
a descending sort — a deliberate trade-off favouring forward-compatibility
against future Better-Auth direction extensions over strict input
validation at this layer.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { compileSortBy } from "./compile-sort.js";
describe("compileSortBy", () => {
it("returns empty for undefined", { timeout: 5000 }, () => {
expect(compileSortBy(undefined)).toBe("");
});
it("compiles asc", { timeout: 5000 }, () => {
expect(compileSortBy({ field: "createdAt", direction: "asc" })).toBe(
"ORDER BY createdAt ASC"
);
});
it("compiles desc", { timeout: 5000 }, () => {
expect(compileSortBy({ field: "createdAt", direction: "desc" })).toBe(
"ORDER BY createdAt DESC"
);
});
it("rejects invalid identifier", { timeout: 5000 }, () => {
expect(() =>
compileSortBy({
field: "weird-name",
direction: "asc",
})
).toThrow(BetterAuthSurrealError);
});
});

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import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
const IDENT = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
export interface SortBy {
readonly field: string;
readonly direction: "asc" | "desc";
}
/**
* Compile a Better-Auth `sortBy` into a SurrealQL `ORDER BY` fragment.
*
* Returns an empty string when `sortBy` is `undefined`. Validates the field
* name against SurrealQL's identifier rule to prevent injection.
*/
export function compileSortBy(sortBy: SortBy | undefined): string {
if (sortBy === undefined) return "";
if (!IDENT.test(sortBy.field)) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT,
`sortBy.field "${sortBy.field}" is not a valid SurrealQL identifier`
);
}
const dir = sortBy.direction === "desc" ? "DESC" : "ASC";
return `ORDER BY ${sortBy.field} ${dir}`;
}

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# compile-where
## Purpose
Translates Better-Auth's `Where[]` filter union into a parameterised
SurrealQL `WHERE` fragment plus a binding record. Every clause maps to a
unique placeholder (`$w0`, `$w1`, …) so SurrealDB binds values via its safe
parameter path — never via string interpolation. Link-field values are
pre-resolved against the configured `LinkFieldMap` before binding so a
`{ field: "userId", value: "u1" }` clause on `session` compiles to a
`WHERE userId = $w0` clause where `$w0 = "user:u1"`, satisfying the
`record<user>` column type.
## Features
- 11 operators: `eq` (default), `ne`, `gt`, `gte`, `lt`, `lte`, `in`,
`not_in`, `contains`, `starts_with`, `ends_with`.
- 2 connectors: `AND` (default), `OR`. The first clause omits the connector.
- Unique placeholder naming via positional index — never collides within
one compile, and the `placeholderPrefix` option lets the adapter keep
`$update`-vs-predicate bindings disjoint when assembling UPDATE queries.
- Link-field pre-resolution: scalar values get `<target>:<v>`; array values
map element-wise (preserving `in` / `not_in` semantics).
- Unknown operators raise `BETTER_AUTH_SURREALDB.INVALID_OPERATOR`.
## Usage: Basic
```ts
import { compileWhere } from "@suaveplan/better-auth-surrealdb/compile";
const { clause, vars } = compileWhere(
[{ field: "age", value: 18, operator: "gte" }],
{ model: "user", linkFields: {} }
);
// clause === "age >= $w0"
// vars === { w0: 18 }
```
## Usage: Advanced
```ts
import { compileWhere } from "@suaveplan/better-auth-surrealdb/compile";
import { DEFAULT_BETTER_AUTH_LINK_FIELDS } from "@suaveplan/better-auth-surrealdb/link-fields";
const compiled = compileWhere(
[
{ field: "userId", value: "u1" },
{ field: "expiresAt", value: new Date(), operator: "lt", connector: "OR" },
],
{
model: "session",
linkFields: DEFAULT_BETTER_AUTH_LINK_FIELDS,
placeholderPrefix: "p",
}
);
// compiled.clause === "userId = $p0 OR expiresAt < $p1"
// compiled.vars.p0 === RecordId("user", "u1") (pre-resolved record link)
```
## API Reference
- `compileWhere(where, options): { clause: string; vars: Record<string, unknown> }`
- `WhereOperator` — closed union of 11 operators.
- `WhereConnector` — `"AND" | "OR"`.
- `WhereClause` — `{ field; value; operator?; connector? }`.
- `CompileWhereOptions` — `{ model; linkFields; placeholderPrefix? }`.
## Implementation Notes
The operator-to-SurrealQL table covers every Better-Auth `whereOperators`
entry. The function returns `{ clause: "", vars: {} }` for empty input,
which lets the adapter splice the result into a SELECT without conditional
branching at the call site. `placeholderPrefix` defaults to `"w"` to match
the spec's `$w0/$w1/…` convention; the adapter uses `"u"` when compiling
MERGE-side bindings (`$update` is its own scope but predicate placeholders
must stay disjoint from any caller-defined params).

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import { DEFAULT_BETTER_AUTH_LINK_FIELDS } from "../link-fields/link-fields.js";
import { compileWhere } from "./compile-where.js";
const NO_LINKS = {} as const;
describe("compileWhere", () => {
it("compiles empty to empty", { timeout: 5000 }, () => {
const out = compileWhere([], { model: "user", linkFields: NO_LINKS });
expect(out.clause).toBe("");
expect(out.vars).toEqual({});
});
it("maps every supported operator", { timeout: 5000 }, () => {
const cases: Array<[string, string]> = [
["eq", "f = $w0"],
["ne", "f != $w0"],
["gt", "f > $w0"],
["gte", "f >= $w0"],
["lt", "f < $w0"],
["lte", "f <= $w0"],
["in", "f IN $w0"],
["not_in", "f NOT IN $w0"],
["contains", "string::contains(f, $w0)"],
["starts_with", "string::starts_with(f, $w0)"],
["ends_with", "string::ends_with(f, $w0)"],
];
for (const [op, expected] of cases) {
const out = compileWhere(
[
{
field: "f",
value: 1,
operator: op as unknown as
| "eq"
| "ne"
| "gt"
| "gte"
| "lt"
| "lte"
| "in"
| "not_in"
| "contains"
| "starts_with"
| "ends_with",
},
],
{ model: "user", linkFields: NO_LINKS }
);
expect(out.clause).toBe(expected);
expect(out.vars).toEqual({ w0: 1 });
}
});
it("defaults operator to eq and connector to AND", {
timeout: 5000,
}, () => {
const out = compileWhere(
[
{ field: "a", value: 1 },
{ field: "b", value: 2 },
],
{ model: "user", linkFields: NO_LINKS }
);
expect(out.clause).toBe("a = $w0 AND b = $w1");
expect(out.vars).toEqual({ w0: 1, w1: 2 });
});
it("AND/OR connectors compose", { timeout: 5000 }, () => {
const out = compileWhere(
[
{ field: "a", value: 1 },
{ field: "b", value: 2, connector: "OR" },
],
{ model: "user", linkFields: NO_LINKS }
);
expect(out.clause).toBe("a = $w0 OR b = $w1");
});
it("unknown operator raises INVALID_OPERATOR", { timeout: 5000 }, () => {
expect(() =>
compileWhere(
[
{
field: "x",
value: 1,
operator: "weird" as unknown as "eq",
},
],
{ model: "user", linkFields: NO_LINKS }
)
).toThrow(BetterAuthSurrealError);
});
it("placeholder names never collide across N clauses", {
timeout: 5000,
}, () => {
const clauses = Array.from({ length: 20 }, (_, i) => ({
field: `f${i}`,
value: i,
}));
const out = compileWhere(clauses, {
model: "user",
linkFields: NO_LINKS,
});
const placeholders = Array.from(out.clause.matchAll(/\$\w+/g)).map(
(m) => m[0]
);
expect(new Set(placeholders).size).toBe(placeholders.length);
expect(Object.keys(out.vars)).toHaveLength(20);
});
it("link-field where values pre-resolved to record-link form", {
timeout: 5000,
}, () => {
const out = compileWhere([{ field: "userId", value: "u1" }], {
model: "session",
linkFields: DEFAULT_BETTER_AUTH_LINK_FIELDS,
});
const w0 = (out.vars as { w0: unknown }).w0;
expect(w0).toBeDefined();
expect(String(w0)).toBe("user:u1");
});
it("link-field array values map element-wise", { timeout: 5000 }, () => {
const out = compileWhere(
[{ field: "userId", value: ["u1", "u2"], operator: "in" }],
{
model: "session",
linkFields: DEFAULT_BETTER_AUTH_LINK_FIELDS,
}
);
const w0 = (out.vars as { w0: unknown }).w0;
expect(Array.isArray(w0)).toBe(true);
const arr = w0 as unknown[];
expect(String(arr[0])).toBe("user:u1");
expect(String(arr[1])).toBe("user:u2");
});
it("non-link fields pass through unmodified", { timeout: 5000 }, () => {
const out = compileWhere([{ field: "email", value: "x@y" }], {
model: "user",
linkFields: DEFAULT_BETTER_AUTH_LINK_FIELDS,
});
expect(out.vars).toEqual({ w0: "x@y" });
});
it("honours custom placeholder prefix", { timeout: 5000 }, () => {
const out = compileWhere([{ field: "id", value: "u1" }], {
model: "user",
linkFields: NO_LINKS,
placeholderPrefix: "p",
});
expect(out.clause).toBe("id = $p0");
// `id` is auto-wrapped as a record-link to the model name.
expect(String((out.vars as { p0: unknown }).p0)).toBe("user:u1");
});
});

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import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import { applyLinkPrefix, linkTargetFor } from "../link-fields/link-fields.js";
import type { LinkFieldMap } from "../types/adapter.js";
/**
* Better-Auth's `Where[]` filter compiled to a parameterised SurrealQL
* `WHERE` fragment.
*
* Mirrors Better-Auth's `whereOperators` tuple verbatim.
*/
export type WhereOperator =
| "eq"
| "ne"
| "gt"
| "gte"
| "lt"
| "lte"
| "in"
| "not_in"
| "contains"
| "starts_with"
| "ends_with";
export type WhereConnector = "AND" | "OR";
export interface WhereClause {
readonly field: string;
readonly value:
| string
| number
| boolean
| string[]
| number[]
| Date
| null;
readonly operator?: WhereOperator | undefined;
readonly connector?: WhereConnector | undefined;
}
export interface CompileWhereOptions {
readonly model: string;
readonly linkFields: LinkFieldMap;
/**
* Optional placeholder prefix override — defaults to `w`. Used by the
* adapter to keep `update`'s `$update` binding separate from `$w0`/`$w1`
* predicate bindings.
*/
readonly placeholderPrefix?: string;
}
export interface CompiledWhere {
readonly clause: string;
readonly vars: Record<string, unknown>;
}
/**
* Operator → SurrealQL fragment template. `{f}` is replaced by the field
* name and `{p}` by the placeholder reference (e.g. `$w0`). Function-call
* operators (`starts_with`, `ends_with`, `contains`) use SurrealQL's
* `string::*` namespace because raw infix forms (`STARTS_WITH`,
* `ENDS_WITH`, `CONTAINS`) are not all reserved tokens in SurrealDB v3.
*/
const OPERATOR_TEMPLATES: Readonly<Record<WhereOperator, string>> = {
eq: "{f} = {p}",
ne: "{f} != {p}",
gt: "{f} > {p}",
gte: "{f} >= {p}",
lt: "{f} < {p}",
lte: "{f} <= {p}",
in: "{f} IN {p}",
not_in: "{f} NOT IN {p}",
contains: "string::contains({f}, {p})",
starts_with: "string::starts_with({f}, {p})",
ends_with: "string::ends_with({f}, {p})",
};
/**
* Compile a `Where[]` filter into a parameterised SurrealQL clause +
* binding record. Empty input compiles to `{ clause: "", vars: {} }`.
*/
export function compileWhere(
where: ReadonlyArray<WhereClause>,
options: CompileWhereOptions
): CompiledWhere {
if (where.length === 0) {
return { clause: "", vars: {} };
}
const prefix = options.placeholderPrefix ?? "w";
const vars: Record<string, unknown> = {};
const parts: string[] = [];
for (let i = 0; i < where.length; i++) {
const clause = where[i] as WhereClause;
const op = clause.operator ?? "eq";
const template = OPERATOR_TEMPLATES[op];
if (template === undefined) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_OPERATOR,
`unknown where operator: ${String(op)}`
);
}
const placeholder = `${prefix}${i}`;
const value = resolveValue(
options.linkFields,
options.model,
clause.field,
clause.value
);
vars[placeholder] = value;
let connector = "";
if (i > 0) {
connector = `${clause.connector ?? "AND"} `;
}
const fragment = template
.replace("{f}", clause.field)
.replace("{p}", `$${placeholder}`);
parts.push(`${connector}${fragment}`);
}
return { clause: parts.join(" "), vars };
}
function resolveValue(
linkFields: LinkFieldMap,
model: string,
field: string,
value: WhereClause["value"]
): unknown {
// The `id` field of every model is a SurrealDB record link by
// construction (record-id strategy). Wrap it the same way as any
// declared link field so predicates like `WHERE id = $p0` bind a
// record reference and not a plain string.
const target =
field === "id" ? model : linkTargetFor(linkFields, model, field);
if (target === null) return value;
if (Array.isArray(value)) {
return value.map((v) => applyLinkPrefix(target, v));
}
return applyLinkPrefix(target, value);
}

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export { compileSelect } from "./compile-select.js";
export { compileSortBy, type SortBy } from "./compile-sort.js";
export {
type CompiledWhere,
type CompileWhereOptions,
compileWhere,
type WhereClause,
type WhereConnector,
type WhereOperator,
} from "./compile-where.js";

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# error-codes
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Defines the closed registry of error codes raised from every public path of
`@suaveplan/better-auth-surrealdb`. Stable string codes let downstream callers
branch on failure reasons without depending on stack-trace text or Better-Auth
internals. Each code is namespaced under `BETTER_AUTH_SURREALDB.*` so log
aggregators and OTel dashboards can pivot on a single attribute regardless of
which package raised the failure.
## Features
- 7 fully-qualified codes: `INVALID_INPUT`, `INVALID_MODEL`,
`INVALID_OPERATOR`, `QUERY_FAILED`, `INVALID_ID_FORMAT`,
`INVALID_LINK_FIELD_VALUE`, `CONNECTION_NOT_READY`.
- `BetterAuthSurrealError` extends `SuaveplanError<BetterAuthSurrealErrorCode>`
so `instanceof` narrows the `code` to the union literal.
- Codes built via `defineCodes("BETTER_AUTH_SURREALDB", […])` so the runtime
object is frozen and the type is fully inferred.
- Carry `cause` and `context` from `SuaveplanErrorOptions` — `QUERY_FAILED`
pins the underlying `SurrealError`, `INVALID_INPUT` pins the `ZodError`.
## Usage: Basic
```ts
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "@suaveplan/better-auth-surrealdb/error-codes";
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_OPERATOR,
"unknown operator: weird"
);
```
## Usage: Advanced
```ts
import { ZodError } from "zod";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "@suaveplan/better-auth-surrealdb/error-codes";
function assertValid<T>(parsed: { success: boolean; error?: ZodError; data?: T }): T {
if (!parsed.success) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT,
"adapter options failed validation",
{ cause: parsed.error }
);
}
return parsed.data as T;
}
```
## API Reference
- `BETTER_AUTH_SURREALDB_CODES` — frozen record `{ [Reason]: "BETTER_AUTH_SURREALDB.<Reason>" }`.
- `BetterAuthSurrealErrorCode` — union literal of the 7 codes.
- `class BetterAuthSurrealError extends SuaveplanError<BetterAuthSurrealErrorCode>`
— public constructor `(code, message, options?)`.
## Implementation Notes
`defineCodes` returns a `Object.freeze`d record so the runtime cannot be
mutated; the type is fully inferred from the tuple literal. The class
constructor is widened to `public` (the base is `protected`) so callers in
sibling feature modules construct errors directly without an intermediate
factory. The class deliberately does NOT carry an OTel span event handle —
instrumentation is the caller's responsibility via `toSpanEvent` from
`@suaveplan/error`.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "./error-codes.js";
describe("error-codes", () => {
it("defines exactly 7 namespaced codes", { timeout: 5000 }, () => {
const keys = Object.keys(BETTER_AUTH_SURREALDB_CODES).sort();
expect(keys).toEqual(
[
"CONNECTION_NOT_READY",
"INVALID_ID_FORMAT",
"INVALID_INPUT",
"INVALID_LINK_FIELD_VALUE",
"INVALID_MODEL",
"INVALID_OPERATOR",
"QUERY_FAILED",
].sort()
);
for (const key of keys) {
expect(
BETTER_AUTH_SURREALDB_CODES[
key as keyof typeof BETTER_AUTH_SURREALDB_CODES
]
).toBe(`BETTER_AUTH_SURREALDB.${key}`);
}
});
it("BetterAuthSurrealError preserves code, message, and cause", {
timeout: 5000,
}, () => {
const cause = new Error("boom");
const err = new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.QUERY_FAILED,
"query failed",
{ cause }
);
expect(err).toBeInstanceOf(BetterAuthSurrealError);
expect(err.code).toBe("BETTER_AUTH_SURREALDB.QUERY_FAILED");
expect(err.message).toBe("query failed");
expect(err.cause).toBe(cause);
});
it("registry is frozen", { timeout: 5000 }, () => {
expect(Object.isFrozen(BETTER_AUTH_SURREALDB_CODES)).toBe(true);
});
});

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import type { SuaveplanErrorOptions } from "@suaveplan/error";
import { defineCodes, SuaveplanError } from "@suaveplan/error";
/**
* Stable error-code registry for `@suaveplan/better-auth-surrealdb`.
*
* Every production failure path raises a {@link BetterAuthSurrealError} with
* one of these 7 namespaced codes. Consumers branch on the string code
* (e.g. `error.code === BETTER_AUTH_SURREALDB_CODES.INVALID_INPUT`) or on
* `instanceof BetterAuthSurrealError` for narrowing.
*/
export const BETTER_AUTH_SURREALDB_CODES = defineCodes(
"BETTER_AUTH_SURREALDB",
[
"INVALID_INPUT",
"INVALID_MODEL",
"INVALID_OPERATOR",
"QUERY_FAILED",
"INVALID_ID_FORMAT",
"INVALID_LINK_FIELD_VALUE",
"CONNECTION_NOT_READY",
] as const
);
export type BetterAuthSurrealErrorCode =
(typeof BETTER_AUTH_SURREALDB_CODES)[keyof typeof BETTER_AUTH_SURREALDB_CODES];
/**
* Concrete error class. `instanceof BetterAuthSurrealError` narrows the
* `code` field to {@link BetterAuthSurrealErrorCode}.
*/
export class BetterAuthSurrealError extends SuaveplanError<BetterAuthSurrealErrorCode> {
public readonly betterAuthSurrealCode: BetterAuthSurrealErrorCode;
public constructor(
code: BetterAuthSurrealErrorCode,
message: string,
options?: SuaveplanErrorOptions
) {
super(code, message, options);
this.betterAuthSurrealCode = code;
}
}

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export type { BetterAuthSurrealErrorCode } from "./error-codes.js";
export {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "./error-codes.js";

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# id-strategy
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Encapsulates the three Better-Auth record-id strategies the adapter
supports. SurrealDB's native record-id format is `<table>:<id>`, but
Better-Auth callers may pass either a bare `id` (record-id mode), no
`id` at all (ulid mode auto-generates), or a row that stores `id` as a
regular field (plain mode). This module resolves the strategy choice into
concrete CREATE-target-and-data tuples and normalises the returned id
on read.
## Features
- `prepareCreate(strategy, table, data) → PreparedCreate` — dispatches on
the strategy and returns `{ target, data, assignedId }`.
- `record-id` strategy: requires non-empty `data.id`, rejects colons, emits
`<table>:\`<id>\`` to keep arbitrary identifier characters safe.
- `ulid` strategy: when `data.id` is absent, generates a 26-char Crockford
base32 ULID (10 chars time + 16 chars random) via `crypto.getRandomValues`.
- `plain` strategy: keeps `id` as a row field; SurrealDB assigns the
storage id; row's `assignedId` echoes `data.id` when present.
- `normaliseReturnedId` — strips the `<table>:` prefix from SurrealDB's
return shape (`RecordId` object, `<table>:<id>` string, or bare value).
- Throws `INVALID_MODEL` when the table name fails the identifier rule.
- Throws `INVALID_ID_FORMAT` when an id-strategy contract is violated.
## Usage: Basic
```ts
import { prepareCreate } from "@suaveplan/better-auth-surrealdb/id-strategy";
const p = prepareCreate("record-id", "user", { id: "u1", email: "x@y" });
// p.target === "user:`u1`"
// p.data === { email: "x@y" }
// p.assignedId === "u1"
```
## Usage: Advanced
```ts
import { prepareCreate, generateUlid } from "@suaveplan/better-auth-surrealdb/id-strategy";
// Inject deterministic id for tests by composing your own table+id outside
// of prepareCreate; or use the ulid generator directly:
const id = generateUlid();
const p = prepareCreate("record-id", "session", { id, userId: "user:u1" });
// Plain mode for schemas that store id as a regular column:
const flat = prepareCreate("plain", "session", { id: "s1", token: "t" });
// flat.target === "session"
// flat.data === { id: "s1", token: "t" }
// flat.assignedId === "s1"
```
## API Reference
- `IdStrategy = "record-id" | "plain" | "ulid"`
- `PreparedCreate = { target: string; data: Row; assignedId: string | null }`
- `prepareCreate(strategy, table, data): PreparedCreate`
- `generateUlid(now?): string` — 26-char Crockford base32 ULID.
- `normaliseReturnedId(value, table): string` — strips `<table>:` from SurrealDB
return shapes.
## Implementation Notes
The ULID alphabet matches the published spec (Crockford base32 minus I, L,
O, U). Random bytes come from `crypto.getRandomValues` so the generator is
universal (works in Bun, Node ≥18, and browsers). The record-id
target is wrapped in backticks so SurrealDB accepts ULIDs containing digits
at position 1 (otherwise the parser may treat the value as a number). The
`prepareCreate` switch is exhaustive; TypeScript narrows `IdStrategy` to
the three known cases at compile time.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import {
generateUlid,
normaliseReturnedId,
prepareCreate,
} from "./id-strategy.js";
describe("prepareCreate", () => {
it("record-id strategy strips and reapplies prefix", {
timeout: 5000,
}, () => {
const p = prepareCreate("record-id", "user", {
id: "u1",
email: "x@y",
});
expect(p.target).toBe("user:`u1`");
expect(p.data).toEqual({ email: "x@y" });
expect(p.assignedId).toBe("u1");
});
it("record-id rejects missing id", { timeout: 5000 }, () => {
expect(() => prepareCreate("record-id", "user", {})).toThrow(
BetterAuthSurrealError
);
});
it("record-id rejects non-string id", { timeout: 5000 }, () => {
expect(() => prepareCreate("record-id", "user", { id: 5 })).toThrow(
BetterAuthSurrealError
);
});
it("colon in record-id raises INVALID_ID_FORMAT", { timeout: 5000 }, () => {
expect(() =>
prepareCreate("record-id", "user", { id: "abc:def" })
).toThrow(BetterAuthSurrealError);
try {
prepareCreate("record-id", "user", { id: "abc:def" });
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.INVALID_ID_FORMAT"
);
}
});
it("invalid table name raises INVALID_MODEL", { timeout: 5000 }, () => {
expect(() =>
prepareCreate("record-id", "weird-name", { id: "u1" })
).toThrow(BetterAuthSurrealError);
});
it("ulid strategy fills missing id", { timeout: 5000 }, () => {
const p = prepareCreate("ulid", "session", { userId: "user:u1" });
expect(p.assignedId).toMatch(/^[0-9A-HJKMNP-TV-Z]{26}$/);
expect(p.target).toBe(`session:\`${p.assignedId}\``);
});
it("ulid strategy respects supplied id", { timeout: 5000 }, () => {
const p = prepareCreate("ulid", "session", {
id: "fixed",
userId: "user:u1",
});
expect(p.assignedId).toBe("fixed");
expect(p.target).toBe("session:`fixed`");
});
it("plain strategy stores id as a field", { timeout: 5000 }, () => {
const p = prepareCreate("plain", "user", {
id: "u1",
email: "x@y",
});
expect(p.target).toBe("user");
expect(p.data).toEqual({ id: "u1", email: "x@y" });
expect(p.assignedId).toBe("u1");
});
it("plain strategy without id returns null assignedId", {
timeout: 5000,
}, () => {
const p = prepareCreate("plain", "user", { email: "x@y" });
expect(p.assignedId).toBeNull();
});
it("plain strategy validates table name", { timeout: 5000 }, () => {
expect(() => prepareCreate("plain", "weird-name", {})).toThrow(
BetterAuthSurrealError
);
});
});
describe("generateUlid", () => {
it("produces a 26-char Crockford-base32 string", { timeout: 5000 }, () => {
const id = generateUlid();
expect(id).toMatch(/^[0-9A-HJKMNP-TV-Z]{26}$/);
});
it("uniqueness across 100 calls", { timeout: 5000 }, () => {
const set = new Set(Array.from({ length: 100 }, () => generateUlid()));
expect(set.size).toBe(100);
});
it("honours injected clock", { timeout: 5000 }, () => {
const fixed = generateUlid(() => 0);
expect(fixed.startsWith("0000000000")).toBe(true);
});
});
describe("normaliseReturnedId", () => {
it("strips `<table>:` prefix from bare string", { timeout: 5000 }, () => {
expect(normaliseReturnedId("user:u1", "user")).toBe("u1");
});
it("strips backtick-wrapped id", { timeout: 5000 }, () => {
expect(normaliseReturnedId("user:`u1`", "user")).toBe("u1");
});
it("passes already-bare value through", { timeout: 5000 }, () => {
expect(normaliseReturnedId("u1", "user")).toBe("u1");
});
it("extracts id from RecordId-shaped object with string id", {
timeout: 5000,
}, () => {
expect(normaliseReturnedId({ tb: "user", id: "u1" }, "user")).toBe(
"u1"
);
});
it("extracts id from RecordId-shaped object with String-wrapped id", {
timeout: 5000,
}, () => {
expect(
normaliseReturnedId({ tb: "user", id: { String: "u1" } }, "user")
).toBe("u1");
});
it("returns empty string for null/undefined", { timeout: 5000 }, () => {
expect(normaliseReturnedId(null, "user")).toBe("");
expect(normaliseReturnedId(undefined, "user")).toBe("");
});
it("coerces non-string scalars", { timeout: 5000 }, () => {
expect(normaliseReturnedId(5, "user")).toBe("5");
});
it("coerces unknown objects via String()", { timeout: 5000 }, () => {
expect(normaliseReturnedId({ foo: "bar" }, "user")).toBe(
"[object Object]"
);
});
});

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import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import type { IdStrategy, Row } from "../types/adapter.js";
/**
* Crockford-base32 alphabet (per ULID spec).
* I, L, O, U are intentionally absent.
*/
const CROCKFORD32 = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
/**
* Generate a 26-character Crockford-base32 ULID:
* - 10 chars time (48-bit ms-since-epoch),
* - 16 chars random (80 bits via `crypto.getRandomValues`).
*/
export function generateUlid(now: () => number = Date.now): string {
let time = now();
const timeChars: string[] = new Array(10);
for (let i = 9; i >= 0; i--) {
timeChars[i] = CROCKFORD32[time % 32] as string;
time = Math.floor(time / 32);
}
const rand = new Uint8Array(16);
crypto.getRandomValues(rand);
const randChars = new Array(16) as string[];
for (let i = 0; i < 16; i++) {
randChars[i] = CROCKFORD32[(rand[i] as number) % 32] as string;
}
return timeChars.join("") + randChars.join("");
}
/**
* Outcome of `prepareCreate` — fully-resolved CREATE arguments.
*
* - `target`: the SurrealQL target — either `<table>:<id>` (record-id /
* ulid) or just `<table>` (plain). The adapter splices this verbatim
* into `CREATE <target> CONTENT $data RETURN AFTER`.
* - `data`: row content excluding the id (record-id) or including it
* (plain).
* - `assignedId`: the id Better-Auth should see after the create returns
* (either supplied, ULID-generated, or `null` when SurrealDB will assign
* one in `plain` mode).
*/
export interface PreparedCreate {
readonly target: string;
readonly data: Row;
readonly assignedId: string | null;
}
const IDENT = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
/**
* Resolve a `(strategy, table, data)` tuple into the CREATE-arguments
* Better-Auth's adapter needs. Encapsulates the three id-strategy
* branches.
*/
export function prepareCreate(
strategy: IdStrategy,
table: string,
data: Row
): PreparedCreate {
switch (strategy) {
case "record-id":
return prepareRecordId(table, data, null);
case "ulid":
return prepareRecordId(table, data, generateUlid);
case "plain":
return preparePlain(table, data);
}
}
function prepareRecordId(
table: string,
data: Row,
fallback: (() => string) | null
): PreparedCreate {
const rawId = data["id"];
let id: string;
if (rawId === undefined || rawId === null || rawId === "") {
if (fallback === null) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_ID_FORMAT,
"idStrategy='record-id' requires data.id to be a non-empty string"
);
}
id = fallback();
} else {
if (typeof rawId !== "string") {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_ID_FORMAT,
`data.id must be a string, got ${typeof rawId}`
);
}
if (rawId.includes(":")) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_ID_FORMAT,
`data.id "${rawId}" must not contain ":" — pass the bare id`
);
}
id = rawId;
}
if (!IDENT.test(table)) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_MODEL,
`table "${table}" is not a valid SurrealQL identifier`
);
}
const { id: _omit, ...rest } = data;
return {
target: `${table}:\`${id}\``,
data: rest,
assignedId: id,
};
}
function preparePlain(table: string, data: Row): PreparedCreate {
if (!IDENT.test(table)) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_MODEL,
`table "${table}" is not a valid SurrealQL identifier`
);
}
const assignedId =
typeof data["id"] === "string" ? (data["id"] as string) : null;
return {
target: table,
data: { ...data },
assignedId,
};
}
/**
* Normalise an `id` value returned by SurrealDB. SurrealDB returns either
* a `RecordId` object (`{ tb, id }`), a string `<table>:<id>`, or a
* bare value. This function returns the bare id portion as a string.
*/
export function normaliseReturnedId(value: unknown, table: string): string {
if (value === null || value === undefined) return "";
if (typeof value === "object") {
const maybeRecord = value as { id?: unknown; tb?: unknown };
if (typeof maybeRecord.id === "string") return maybeRecord.id;
if (
typeof maybeRecord.id === "object" &&
maybeRecord.id !== null &&
"String" in (maybeRecord.id as Record<string, unknown>)
) {
return String(
(maybeRecord.id as Record<string, unknown>)["String"]
);
}
return String(value);
}
if (typeof value !== "string") return String(value);
const prefix = `${table}:`;
if (value.startsWith(prefix)) {
const stripped = value.slice(prefix.length);
return stripped.startsWith("`") && stripped.endsWith("`")
? stripped.slice(1, -1)
: stripped;
}
return value;
}

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export type { PreparedCreate } from "./id-strategy.js";
export {
generateUlid,
normaliseReturnedId,
prepareCreate,
} from "./id-strategy.js";

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// Adapter (flagship)
export {
BETTER_AUTH_SURREAL_ADAPTER_ID,
type BetterAuthSurrealAdapter,
type BetterAuthSurrealAdapterV16Options,
betterAuthSurrealAdapter,
createBetterAuthSurrealAdapter,
ModelToTableCache,
type ModelToTableResolver,
} from "./adapter/index.js";
// Compile
export {
type CompiledWhere,
type CompileWhereOptions,
compileSelect,
compileSortBy,
compileWhere,
type SortBy,
type WhereClause,
type WhereConnector,
type WhereOperator,
} from "./compile/index.js";
// Error codes
export {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
type BetterAuthSurrealErrorCode,
} from "./error-codes/index.js";
// Id strategy
export {
generateUlid,
normaliseReturnedId,
type PreparedCreate,
prepareCreate,
} from "./id-strategy/index.js";
// Link fields
export {
applyLinkPrefix,
applyLinkPrefixesToWrite,
DEFAULT_BETTER_AUTH_LINK_FIELDS,
isRecordLikeValue,
linkTargetFor,
makeRecordId,
makeStringRecordId,
stripLinkPrefix,
stripLinkPrefixesFromRead,
} from "./link-fields/index.js";
// OTel
export {
type AdapterOutcome,
type InstrumentedOp,
instrument,
resetInstrumentsForTesting,
} from "./otel/index.js";
// Schema
export {
applyBetterAuthSchema,
BETTER_AUTH_SURREAL_SCHEMA,
} from "./schema/index.js";
// Zod schemas
export {
type BetterAuthSurrealAdapterOptionsInput,
BetterAuthSurrealAdapterOptionsSchema,
LinkFieldMapSchema,
type LinkFieldMapSchemaInput,
type LinkFieldMapSchemaOutput,
} from "./schemas/index.js";
// Types
export type {
BetterAuthSurrealAdapterOptions,
IdStrategy,
LinkFieldMap,
Row,
SurrealClientView,
} from "./types/index.js";

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export {
applyLinkPrefix,
applyLinkPrefixesToWrite,
DEFAULT_BETTER_AUTH_LINK_FIELDS,
isRecordLikeValue,
linkTargetFor,
makeRecordId,
makeStringRecordId,
stripLinkPrefix,
stripLinkPrefixesFromRead,
} from "./link-fields.js";

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# link-fields
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Encapsulates the central design decision of this package: SurrealDB stores
record references as typed `record<target>` columns where the value at rest
is `<target>:<bare-id>`, but Better-Auth hands the adapter a bare `userId:
"u1"` regardless of which underlying table declares the field as a record
link. Without per-field prefix handling, writes to record-link columns would
fail SurrealDB's type assertion and reads would return `user:u1` strings
that break Better-Auth's identity comparisons. This module provides the
default field map, the per-value `apply`/`strip` primitives, and the
row-level walkers the adapter dispatches.
## Features
- `DEFAULT_BETTER_AUTH_LINK_FIELDS` — frozen default matching every
`record<...>` field in the bundled schema (9 model entries).
- `linkTargetFor(map, model, field)` — pure lookup returning the configured
target table or `null`.
- `applyLinkPrefix(target, value)` — adds `<target>:` to plain strings;
refuses values already containing `:` with `INVALID_LINK_FIELD_VALUE`.
- `stripLinkPrefix(target, value)` — strips `<target>:` from prefixed
strings; idempotent on bare strings.
- `applyLinkPrefixesToWrite(map, model, data)` — clones `data` and prefixes
every declared link field in one pass.
- `stripLinkPrefixesFromRead(map, model, row)` — clones `row` and strips
every declared link field in one pass.
## Usage: Basic
```ts
import {
DEFAULT_BETTER_AUTH_LINK_FIELDS,
applyLinkPrefixesToWrite,
stripLinkPrefixesFromRead,
} from "@suaveplan/better-auth-surrealdb/link-fields";
const onDisk = applyLinkPrefixesToWrite(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"session",
{ userId: "u1", token: "t" }
);
// onDisk.userId === "user:u1"
const returned = stripLinkPrefixesFromRead(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"session",
{ userId: "user:u1", token: "t" }
);
// returned.userId === "u1"
```
## Usage: Advanced
```ts
import {
applyLinkPrefix,
stripLinkPrefix,
linkTargetFor,
} from "@suaveplan/better-auth-surrealdb/link-fields";
const map = { session: { userId: "user" } } as const;
// Per-value primitives — used by compileWhere for Where[] bindings.
const target = linkTargetFor(map, "session", "userId"); // "user"
if (target !== null) {
const bound = applyLinkPrefix(target, "u1"); // "user:u1"
const bare = stripLinkPrefix(target, bound); // "u1"
}
```
## API Reference
- `DEFAULT_BETTER_AUTH_LINK_FIELDS: LinkFieldMap`
- `linkTargetFor(map, model, field): string | null`
- `applyLinkPrefix(target, value): unknown` — throws `INVALID_LINK_FIELD_VALUE`
when the value already contains `:`.
- `stripLinkPrefix(target, value): unknown`
- `applyLinkPrefixesToWrite(map, model, data): Record<string, unknown>`
- `stripLinkPrefixesFromRead(map, model, row): Record<string, unknown>`
## Implementation Notes
The default map is built with nested `Object.freeze` so callers cannot
accidentally mutate the shared singleton. Non-string values pass through
both `apply` and `strip` (the schema permits `option<record<user>>` to be
`null`). `applyLinkPrefix` refuses values containing `:` because the
adapter would otherwise emit `user:user:u1` on write — defending against
double-application is critical because Better-Auth's higher layers may
synthesise rows from joined-read output that already carries prefixes.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import {
applyLinkPrefix,
applyLinkPrefixesToWrite,
DEFAULT_BETTER_AUTH_LINK_FIELDS,
isRecordLikeValue,
linkTargetFor,
makeRecordId,
makeStringRecordId,
stripLinkPrefix,
stripLinkPrefixesFromRead,
} from "./link-fields.js";
describe("DEFAULT_BETTER_AUTH_LINK_FIELDS", () => {
it("covers every record-link field in the bundled schema", {
timeout: 5000,
}, () => {
// From the bundled schema (record<...> typed columns):
const expected: Record<string, Record<string, string>> = {
session: { userId: "user" },
passkey: { userId: "user" },
member: { userId: "user", organizationId: "organization" },
invitation: {
inviterId: "user",
organizationId: "organization",
teamId: "team",
},
team: { organizationId: "organization" },
team_member: { userId: "user", teamId: "team" },
two_factor: { userId: "user" },
api_key: { userId: "user" },
sso_provider: { userId: "user" },
};
for (const [model, fields] of Object.entries(expected)) {
for (const [field, target] of Object.entries(fields)) {
expect(
linkTargetFor(DEFAULT_BETTER_AUTH_LINK_FIELDS, model, field)
).toBe(target);
}
}
});
it("is frozen at every nesting level", { timeout: 5000 }, () => {
expect(Object.isFrozen(DEFAULT_BETTER_AUTH_LINK_FIELDS)).toBe(true);
expect(
Object.isFrozen(DEFAULT_BETTER_AUTH_LINK_FIELDS["session"])
).toBe(true);
});
it("account.userId is NOT prefixed under default config", {
timeout: 5000,
}, () => {
expect(
linkTargetFor(DEFAULT_BETTER_AUTH_LINK_FIELDS, "account", "userId")
).toBeNull();
});
});
describe("applyLinkPrefix", () => {
it("prefixes plain strings as StringRecordId", { timeout: 5000 }, () => {
const out = applyLinkPrefix("user", "u1");
expect(isRecordLikeValue(out)).toBe(true);
expect(String(out)).toBe("user:u1");
});
it("passes non-string values through", { timeout: 5000 }, () => {
expect(applyLinkPrefix("user", null)).toBeNull();
expect(applyLinkPrefix("user", undefined)).toBeUndefined();
expect(applyLinkPrefix("user", 5 as unknown)).toBe(5);
});
it("throws INVALID_LINK_FIELD_VALUE on values containing :", {
timeout: 5000,
}, () => {
expect(() => applyLinkPrefix("user", "abc:def")).toThrow(
BetterAuthSurrealError
);
try {
applyLinkPrefix("user", "abc:def");
} catch (err) {
expect(err).toBeInstanceOf(BetterAuthSurrealError);
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.INVALID_LINK_FIELD_VALUE"
);
}
});
});
describe("stripLinkPrefix", () => {
it("strips matching string prefix", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", "user:u1")).toBe("u1");
});
it("unwraps RecordId to bare string id", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", makeRecordId("user", "u1"))).toBe("u1");
});
it("unwraps StringRecordId to bare string id", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", makeStringRecordId("user:u1"))).toBe(
"u1"
);
});
it("StringRecordId without matching prefix returns toString", {
timeout: 5000,
}, () => {
// toString returns the raw input "org:o1" — strip only matches `user:`.
expect(stripLinkPrefix("user", makeStringRecordId("org:o1"))).toBe(
"org:o1"
);
});
it("passes bare strings through", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", "u1")).toBe("u1");
});
it("passes non-matching prefix through", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", "org:o1")).toBe("org:o1");
});
it("passes non-string values through", { timeout: 5000 }, () => {
expect(stripLinkPrefix("user", null)).toBeNull();
expect(stripLinkPrefix("user", 5 as unknown)).toBe(5);
});
});
describe("applyLinkPrefixesToWrite", () => {
it("rewrites declared fields and clones", { timeout: 5000 }, () => {
const input = { userId: "u1", token: "t" };
const out = applyLinkPrefixesToWrite(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"session",
input
);
expect(isRecordLikeValue(out["userId"])).toBe(true);
expect(String(out["userId"])).toBe("user:u1");
expect(out["token"]).toBe("t");
expect(out).not.toBe(input);
expect(input.userId).toBe("u1"); // unmutated
});
it("returns shallow clone for unmapped models", { timeout: 5000 }, () => {
const input = { userId: "u1" };
const out = applyLinkPrefixesToWrite(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"account",
input
);
expect(out).toEqual({ userId: "u1" });
expect(out).not.toBe(input);
});
it("skips fields absent from data", { timeout: 5000 }, () => {
const out = applyLinkPrefixesToWrite(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"member",
{ userId: "u1" }
);
expect(isRecordLikeValue(out["userId"])).toBe(true);
});
it("empty linkFields disables manipulation", { timeout: 5000 }, () => {
const out = applyLinkPrefixesToWrite({}, "session", { userId: "u1" });
expect(out).toEqual({ userId: "u1" });
});
});
describe("stripLinkPrefixesFromRead", () => {
it("strips declared fields and clones", { timeout: 5000 }, () => {
const input = {
userId: makeRecordId("user", "u1"),
token: "t",
};
const out = stripLinkPrefixesFromRead(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"session",
input
);
expect(out).toEqual({ userId: "u1", token: "t" });
});
it("returns shallow clone for unmapped models", { timeout: 5000 }, () => {
const out = stripLinkPrefixesFromRead(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"account",
{ userId: "u1" }
);
expect(out).toEqual({ userId: "u1" });
});
it("skips fields absent from row", { timeout: 5000 }, () => {
const out = stripLinkPrefixesFromRead(
DEFAULT_BETTER_AUTH_LINK_FIELDS,
"member",
{ role: "admin" }
);
expect(out).toEqual({ role: "admin" });
});
});

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import { RecordId, StringRecordId } from "surrealdb";
import {
BETTER_AUTH_SURREALDB_CODES,
BetterAuthSurrealError,
} from "../error-codes/error-codes.js";
import type { LinkFieldMap } from "../types/adapter.js";
// Resolve the SurrealDB driver via ESM so `instanceof` checks against the
// driver's internal RecordId class identity line up with the values this
// package produces. `@suaveplan/surrealdb` also uses ESM for the driver,
// so both consumers share the same `surrealdb.mjs` module instance.
const SurrealRecordId = RecordId;
const SurrealStringRecordId = StringRecordId;
/**
* Construct a SurrealDB `RecordId` instance bound to the same CJS module the
* underlying driver evaluates `instanceof` against. Direct ESM imports of
* the same class identifier may resolve to a different class instance in
* dual-package (CJS/ESM) modules, which is why the adapter wraps its own
* factory rather than re-exporting the driver classes.
*/
export function makeRecordId(table: string, id: string): object {
return new SurrealRecordId(table, id);
}
/**
* Construct a SurrealDB `StringRecordId` from the wire form `<table>:<id>`.
*/
export function makeStringRecordId(rid: string): object {
return new SurrealStringRecordId(rid);
}
/**
* Duck-typed predicate: is the value an instance of any SurrealDB record-id
* shape (RecordId or StringRecordId) bound to the same module? Used by
* `stripLinkPrefix` to avoid cross-module instanceof pitfalls.
*/
export function isRecordLikeValue(value: unknown): boolean {
return (
value instanceof SurrealRecordId ||
value instanceof SurrealStringRecordId
);
}
/**
* Default `LinkFieldMap` matching the bundled 17-table schema's
* `record<target>` columns. Mirrors every `record<...>` typed field in
* `BETTER_AUTH_SURREAL_SCHEMA` so consumers using the canonical schema get
* correct prefix handling without configuration.
*/
export const DEFAULT_BETTER_AUTH_LINK_FIELDS: LinkFieldMap = Object.freeze({
session: Object.freeze({ userId: "user" }),
passkey: Object.freeze({ userId: "user" }),
member: Object.freeze({ userId: "user", organizationId: "organization" }),
invitation: Object.freeze({
inviterId: "user",
organizationId: "organization",
teamId: "team",
}),
team: Object.freeze({ organizationId: "organization" }),
team_member: Object.freeze({ userId: "user", teamId: "team" }),
two_factor: Object.freeze({ userId: "user" }),
api_key: Object.freeze({ userId: "user" }),
sso_provider: Object.freeze({ userId: "user" }),
});
/**
* Return the link-field target table for `(model, field)` or `null` when
* the field is not configured as a record-link.
*/
export function linkTargetFor(
map: LinkFieldMap,
model: string,
field: string
): string | null {
const modelMap = map[model];
if (modelMap === undefined) return null;
const target = modelMap[field];
return target === undefined ? null : target;
}
/**
* Apply the `<target>` record-link wrapper to a value about to be written
* to a record-link field. Returns a SurrealDB `RecordId` instance — the
* driver serialises this as a typed record reference (not a string).
*
* - If `value` already contains `:`, raises
* `BETTER_AUTH_SURREALDB.INVALID_LINK_FIELD_VALUE` (caller is sending a
* pre-formed record link to a field the adapter would wrap again).
* - Non-string values pass through (record-link `null` is allowed for
* optional fields like `sso_provider.userId`).
*/
export function applyLinkPrefix(target: string, value: unknown): unknown {
if (typeof value !== "string") return value;
if (value.includes(":")) {
throw new BetterAuthSurrealError(
BETTER_AUTH_SURREALDB_CODES.INVALID_LINK_FIELD_VALUE,
`link-field value "${value}" already contains ":" — cannot wrap as record<${target}>`
);
}
return makeStringRecordId(`${target}:${value}`);
}
/**
* Strip the `<target>:` prefix from a value read back from a record-link
* field. Handles three return shapes from `surrealdb` v3:
* - `RecordId` instance — returns `.id` as a string.
* - `"<target>:<id>"` string — returns the suffix.
* - Anything else — returned verbatim (operator schema drift).
*/
export function stripLinkPrefix(target: string, value: unknown): unknown {
if (value instanceof SurrealRecordId) {
return String((value as unknown as { id: string }).id);
}
if (value instanceof SurrealStringRecordId) {
const s = String(value);
const prefix = `${target}:`;
return s.startsWith(prefix) ? s.slice(prefix.length) : s;
}
if (typeof value !== "string") return value;
const prefix = `${target}:`;
return value.startsWith(prefix) ? value.slice(prefix.length) : value;
}
/**
* Walk a row about to be written; for each declared link field whose value
* is a plain string, replace it with the prefixed record-link form.
*
* Mutates a clone; the caller's input is never mutated.
*/
export function applyLinkPrefixesToWrite(
map: LinkFieldMap,
model: string,
data: Readonly<Record<string, unknown>>
): Record<string, unknown> {
const modelMap = map[model];
if (modelMap === undefined) return { ...data };
const out: Record<string, unknown> = { ...data };
for (const [field, target] of Object.entries(modelMap)) {
if (field in out) {
out[field] = applyLinkPrefix(target, out[field]);
}
}
return out;
}
/**
* Walk a row read from SurrealDB; for each declared link field, strip the
* `<target>:` prefix back to the bare id Better-Auth expects. Returns a
* shallow clone — never mutates input.
*/
export function stripLinkPrefixesFromRead(
map: LinkFieldMap,
model: string,
row: Readonly<Record<string, unknown>>
): Record<string, unknown> {
const modelMap = map[model];
if (modelMap === undefined) return { ...row };
const out: Record<string, unknown> = { ...row };
for (const [field, target] of Object.entries(modelMap)) {
if (field in out) {
out[field] = stripLinkPrefix(target, out[field]);
}
}
return out;
}

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export {
type AdapterOutcome,
type InstrumentedOp,
instrument,
resetInstrumentsForTesting,
} from "./instruments.js";

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# otel/instruments
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Wires the package's OpenTelemetry metrics surface and exposes a thin
`instrument(op)` helper the adapter wraps around every CRUD method. The
helper records one counter point (with `outcome: "success" | "error"`)
plus one histogram observation per call, so dashboards can pivot on
model/operation/outcome and also see the per-operation latency
distribution.
## Features
- `better_auth.surrealdb.operations_total` counter — attributes:
`model`, `operation`, `outcome`.
- `better_auth.surrealdb.operation_duration_ms` histogram — attribute:
`operation`.
- Lazy meter resolution: the meter and instruments are constructed on
first use (not at module load) so tests can install a real
`MeterProvider` via `setGlobalMeterProvider` before the adapter
begins issuing operations.
- Universal: uses `performance.now()` when available, falls back to
`Date.now()` when running under bundlers that strip `performance`.
- `resetInstrumentsForTesting()` clears the lazy cache so a re-imported
test environment resolves the new provider.
## Usage: Basic
```ts
import { instrument } from "@suaveplan/better-auth-surrealdb/otel";
const row = await instrument({
model: "session",
operation: "create",
run: async () => insertSessionRow(),
});
```
## Usage: Advanced
```ts
import { instrument } from "@suaveplan/better-auth-surrealdb/otel";
import { metrics } from "@opentelemetry/api";
import { MeterProvider, PeriodicExportingMetricReader, InMemoryMetricExporter, AggregationTemporality } from "@opentelemetry/sdk-metrics";
// Install provider BEFORE first instrument() call:
const exporter = new InMemoryMetricExporter(AggregationTemporality.CUMULATIVE);
const reader = new PeriodicExportingMetricReader({ exporter, exportIntervalMillis: 60_000 });
const provider = new MeterProvider({ readers: [reader] });
metrics.setGlobalMeterProvider(provider);
await instrument({ model: "user", operation: "findOne", run: async () => ({ ok: true }) });
await provider.forceFlush();
const collected = exporter.getMetrics();
```
## API Reference
- `instrument<T>(op): Promise<T>` — wraps a `() => Promise<T>` with counter +
histogram observations; rethrows on failure.
- `InstrumentedOp<T>` — `{ model: string; operation: string; run: () => Promise<T> }`.
- `AdapterOutcome` — `"success" | "error"`.
- `resetInstrumentsForTesting()` — invalidates the lazy cache.
## Implementation Notes
The lazy-init pattern is critical: importing OTel `metrics` at module load
returns a noop meter unless `setGlobalMeterProvider` has been called by the
host. Caching the meter+instruments after first use keeps subsequent calls
allocation-free. `performance.now()` is preferred for sub-millisecond
resolution but `Date.now()` is a correct fallback because the histogram
records millisecond observations regardless.

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import { afterAll, describe, expect, it } from "@suaveplan/testing/runner";
import { flushTestMetrics } from "../../tests/setup/polyfills.js";
import { instrument, resetInstrumentsForTesting } from "./instruments.js";
describe("instrument", () => {
afterAll(() => {
resetInstrumentsForTesting();
});
it("counter emits success", { timeout: 5000 }, async () => {
await instrument({
model: "user",
operation: "create",
run: async () => ({ ok: true }),
});
const collected = await flushTestMetrics();
const dump = JSON.stringify(collected);
expect(dump).toContain("operations_total");
expect(dump).toContain('"outcome":"success"');
});
it("counter emits error and rethrows", { timeout: 5000 }, async () => {
await expect(
instrument({
model: "user",
operation: "create",
run: async () => {
throw new Error("boom");
},
})
).rejects.toThrow("boom");
const collected = await flushTestMetrics();
const dump = JSON.stringify(collected);
expect(dump).toContain('"outcome":"error"');
});
it("histogram records per operation", { timeout: 5000 }, async () => {
await instrument({
model: "session",
operation: "findOne",
run: async () => null,
});
const collected = await flushTestMetrics();
const dump = JSON.stringify(collected);
expect(dump).toContain("operation_duration_ms");
});
});

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import { type Counter, type Histogram, metrics } from "@opentelemetry/api";
const METER_NAME = "@suaveplan/better-auth-surrealdb";
interface CachedInstruments {
counter: Counter;
histogram: Histogram;
}
let cached: CachedInstruments | null = null;
function getInstruments(): CachedInstruments {
if (cached !== null) return cached;
const meter = metrics.getMeter(METER_NAME);
const counter = meter.createCounter(
"better_auth.surrealdb.operations_total",
{
description:
"Better-Auth SurrealDB adapter operations (per model + outcome)",
}
);
const histogram = meter.createHistogram(
"better_auth.surrealdb.operation_duration_ms",
{
description:
"Better-Auth SurrealDB adapter operation duration in ms",
unit: "ms",
}
);
cached = { counter, histogram };
return cached;
}
/**
* Test-only reset hook — clears the lazy-init cache so the next call
* re-resolves against the current global `MeterProvider`. The adapter's
* production paths never call this.
*/
export function resetInstrumentsForTesting(): void {
cached = null;
}
export type AdapterOutcome = "success" | "error";
export interface InstrumentedOp<T> {
readonly model: string;
readonly operation: string;
run: () => Promise<T>;
}
/**
* Run `op()` while recording one counter point + one histogram observation.
* The counter's `outcome` attribute distinguishes successes from failures
* (without swallowing the error — failures rethrow).
*/
export async function instrument<T>(op: InstrumentedOp<T>): Promise<T> {
const { counter, histogram } = getInstruments();
const start = performance.now();
try {
const result = await op.run();
const elapsed = performance.now() - start;
counter.add(1, {
model: op.model,
operation: op.operation,
outcome: "success" satisfies AdapterOutcome,
});
histogram.record(elapsed, { operation: op.operation });
return result;
} catch (err) {
const elapsed = performance.now() - start;
counter.add(1, {
model: op.model,
operation: op.operation,
outcome: "error" satisfies AdapterOutcome,
});
histogram.record(elapsed, { operation: op.operation });
throw err;
}
}

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export {
applyBetterAuthSchema,
BETTER_AUTH_SURREAL_SCHEMA,
} from "./schema.js";

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# schema
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Bundles the canonical 17-table Better-Auth SurrealQL schema as a frozen
string constant `BETTER_AUTH_SURREAL_SCHEMA` and exposes a one-shot
`applyBetterAuthSchema(client)` helper for callers who do not run their
DDL through `@suaveplan/api-migrations`. Schema content is mirrored
byte-for-byte from the canonical source-of-truth file
`/mnt/f/surrealdb/surql/features/02-auth/02-better-auth.surql`; future
upstream changes require a coordinated package version bump.
## Features
- 17 DDL targets: `user` field extensions, plus `session`, `account`,
`verification`, `passkey`, `jwks`, `sso_provider`, `oauth_application`,
`oauth_access_token`, `oauth_consent`, `organization`, `member`,
`invitation`, `team`, `team_member`, `two_factor`, `api_key`.
- 13 indexes (account provider, verification identifier, SSO provider id,
oauth client/access/refresh tokens, organization slug, passkey
credential, user phone, api_key prefix/user, member/team uniqueness,
invitation email/org).
- Idempotent on re-application — every `DEFINE TABLE`/`DEFINE FIELD`/
`DEFINE INDEX` uses the `OVERWRITE` flag.
- `applyBetterAuthSchema(client)` executes the schema via the
`SurrealClientView.execute()` surface and wraps any underlying failure
in `BetterAuthSurrealError(QUERY_FAILED)`.
## Usage: Basic
```ts
import { SurrealAdapter } from "@suaveplan/surrealdb";
import { applyBetterAuthSchema } from "@suaveplan/better-auth-surrealdb/schema";
const client = new SurrealAdapter({ url: "ws://localhost:8000" });
await client.connect();
await applyBetterAuthSchema(client);
```
## Usage: Advanced
```ts
import { BETTER_AUTH_SURREAL_SCHEMA } from "@suaveplan/better-auth-surrealdb/schema";
// Pipe the schema through @suaveplan/api-migrations
import { createSurrealqlAdapter } from "@suaveplan/api-migrations";
const migrations = createSurrealqlAdapter({
steps: [
{ id: "001-better-auth", up: BETTER_AUTH_SURREAL_SCHEMA },
],
});
await migrations.run(client);
```
## API Reference
- `BETTER_AUTH_SURREAL_SCHEMA: string` — frozen DDL string.
- `applyBetterAuthSchema(client: SurrealClientView): Promise<void>` — executes
the schema via `client.execute(...)`; wraps failures in `QUERY_FAILED`.
## Implementation Notes
The constant is a single string literal so bundlers can tree-shake it out
of consumers that import only `applyBetterAuthSchema` from sibling
modules. Newlines are preserved (`\n`) so EXPLAIN output and DB logs stay
human-readable. The helper executes the whole DDL in one `execute()`
call; SurrealDB v3 parses multi-statement scripts natively and runs them
sequentially within a single response. Failure capture preserves the
underlying `SurrealError` via `cause` for upstream telemetry.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealError } from "../error-codes/error-codes.js";
import type { SurrealClientView } from "../types/adapter.js";
import { applyBetterAuthSchema, BETTER_AUTH_SURREAL_SCHEMA } from "./schema.js";
const EXPECTED_TABLES = [
"session",
"account",
"verification",
"passkey",
"jwks",
"sso_provider",
"oauth_application",
"oauth_access_token",
"oauth_consent",
"organization",
"member",
"invitation",
"team",
"team_member",
"two_factor",
"api_key",
] as const;
describe("BETTER_AUTH_SURREAL_SCHEMA", () => {
it("contains every required table via DEFINE TABLE OVERWRITE", {
timeout: 5000,
}, () => {
for (const table of EXPECTED_TABLES) {
const re = new RegExp(`DEFINE TABLE OVERWRITE ${table}\\b`);
expect(BETTER_AUTH_SURREAL_SCHEMA).toMatch(re);
}
});
it("extends the user table with field-only definitions (no DEFINE TABLE user)", {
timeout: 5000,
}, () => {
expect(BETTER_AUTH_SURREAL_SCHEMA).not.toMatch(
/DEFINE TABLE OVERWRITE user\b/
);
expect(BETTER_AUTH_SURREAL_SCHEMA).toMatch(
/DEFINE FIELD OVERWRITE emailVerified ON user\b/
);
});
it("declares 13+ indexes", { timeout: 5000 }, () => {
const count = (
BETTER_AUTH_SURREAL_SCHEMA.match(/DEFINE INDEX OVERWRITE/g) ?? []
).length;
expect(count).toBeGreaterThanOrEqual(13);
});
});
describe("applyBetterAuthSchema", () => {
it("executes the schema via client.execute", {
timeout: 5000,
}, async () => {
const calls: string[] = [];
const client: SurrealClientView = {
isConnected: true,
async query() {
return [];
},
async execute(sql: string) {
calls.push(sql);
return { rowsAffected: 0 };
},
};
await applyBetterAuthSchema(client);
expect(calls).toHaveLength(1);
expect(calls[0]).toBe(BETTER_AUTH_SURREAL_SCHEMA);
});
it("wraps execution failure in QUERY_FAILED", {
timeout: 5000,
}, async () => {
const client: SurrealClientView = {
isConnected: true,
async query() {
return [];
},
async execute() {
throw new Error("boom");
},
};
await expect(applyBetterAuthSchema(client)).rejects.toThrow(
BetterAuthSurrealError
);
try {
await applyBetterAuthSchema(client);
} catch (err) {
expect((err as BetterAuthSurrealError).code).toBe(
"BETTER_AUTH_SURREALDB.QUERY_FAILED"
);
expect((err as Error).cause).toBeDefined();
}
});
});

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export {
LinkFieldMapSchema,
type LinkFieldMapSchemaInput,
type LinkFieldMapSchemaOutput,
} from "./link-fields.js";
export {
type BetterAuthSurrealAdapterOptionsInput,
BetterAuthSurrealAdapterOptionsSchema,
} from "./options.js";

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# schemas/link-fields
## Purpose
Zod boundary schema asserting the structural shape of a `LinkFieldMap`. Used
to validate the optional `linkFields` argument passed to
`createBetterAuthSurrealAdapter` and to gate any callers that hand-roll their
own override map at runtime. Validation rejects non-string targets, empty
keys, and identifiers that would break the generated SurrealQL identifier
rule (`/^[a-zA-Z_][a-zA-Z0-9_]*$/`).
## Features
- Identifier-rule enforcement on model name, field name, and target table.
- Empty-string rejection (model/field/target must be `min(1)`).
- Composable: re-exported as `LinkFieldMapSchema` from `./schemas` and
embedded inside `BetterAuthSurrealAdapterOptionsSchema`.
- Type-level `LinkFieldMapSchemaInput` / `LinkFieldMapSchemaOutput` exports
for downstream consumers that derive their own option shapes.
## Usage: Basic
```ts
import { LinkFieldMapSchema } from "@suaveplan/better-auth-surrealdb/schemas/link-fields";
const parsed = LinkFieldMapSchema.safeParse({
session: { userId: "user" },
});
if (!parsed.success) throw parsed.error;
```
## Usage: Advanced
```ts
import { LinkFieldMapSchema } from "@suaveplan/better-auth-surrealdb/schemas/link-fields";
// Reject non-string targets at the wire boundary
const bad = LinkFieldMapSchema.safeParse({
session: { userId: 5 },
});
console.log(bad.success); // false
// Custom map merging
const merged = LinkFieldMapSchema.parse({
...{ session: { userId: "user" } },
...{ api_key: { userId: "user" } },
});
```
## API Reference
- `LinkFieldMapSchema: z.ZodType` — accepts `Record<string, Record<string, string>>`.
- `LinkFieldMapSchemaInput` — pre-parse type.
- `LinkFieldMapSchemaOutput` — post-parse type.
## Implementation Notes
The schema uses `z.record(IdentString, z.record(IdentString, IdentString))`.
Keys go through Zod's `z.record(keySchema, valueSchema)` 4-arg form so the
identifier check applies to the model/field names as well as the target
table. Empty-object inputs (`{}`) parse successfully — operators commonly
pass `linkFields: {}` to disable prefix manipulation entirely.
The `IdentString` schema delegates to `z.string().min(1).regex(...)` so
the inner regex never has to deal with empty strings (which would slip
through the regex via the implicit anchored-success path). The error
message attached to the regex check is human-readable and surfaces in
`ZodError.issues[i].message` for downstream error reporters, while the
issue path lets log aggregators pivot on offending fields without
parsing the message.
Type-level exports `LinkFieldMapSchemaInput` and `LinkFieldMapSchemaOutput`
are identical in this case (the schema is `transform`-free) but the
distinction is preserved so future extensions (e.g. coercing aliases to
canonical table names) can change one without breaking the other.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { LinkFieldMapSchema } from "./link-fields.js";
describe("LinkFieldMapSchema", () => {
it("accepts a valid map", { timeout: 5000 }, () => {
const parsed = LinkFieldMapSchema.safeParse({
session: { userId: "user" },
member: { userId: "user", organizationId: "organization" },
});
expect(parsed.success).toBe(true);
});
it("accepts the empty map", { timeout: 5000 }, () => {
expect(LinkFieldMapSchema.safeParse({}).success).toBe(true);
});
it("rejects non-string target table", { timeout: 5000 }, () => {
const parsed = LinkFieldMapSchema.safeParse({
session: { userId: 5 as unknown as string },
});
expect(parsed.success).toBe(false);
});
it("rejects identifier-invalid model name", { timeout: 5000 }, () => {
const parsed = LinkFieldMapSchema.safeParse({
"weird-name": { userId: "user" },
});
expect(parsed.success).toBe(false);
});
it("rejects identifier-invalid target table", { timeout: 5000 }, () => {
const parsed = LinkFieldMapSchema.safeParse({
session: { userId: "weird-name" },
});
expect(parsed.success).toBe(false);
});
});

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import z from "zod";
/**
* Zod schema validating the shape of `LinkFieldMap`:
* `Record<modelName, Record<fieldName, targetTableName>>`.
*
* Both keys and the leaf target-table string MUST match SurrealDB's
* `/^[a-zA-Z_][a-zA-Z0-9_]*$/` identifier rule so the generated SurrealQL
* cannot inject syntax.
*/
const IDENT = /^[a-zA-Z_][a-zA-Z0-9_]*$/;
const IdentString = z
.string()
.min(1)
.regex(IDENT, { message: "must match /^[a-zA-Z_][a-zA-Z0-9_]*$/" });
export const LinkFieldMapSchema = z.record(
IdentString,
z.record(IdentString, IdentString)
);
export type LinkFieldMapSchemaInput = z.input<typeof LinkFieldMapSchema>;
export type LinkFieldMapSchemaOutput = z.output<typeof LinkFieldMapSchema>;

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# schemas/options
## Purpose
Zod boundary schema for `BetterAuthSurrealAdapterOptions`. Drives the runtime
validation step inside `createBetterAuthSurrealAdapter` so callers cannot
construct an adapter against a malformed configuration. Failure raises
`BetterAuthSurrealError(INVALID_INPUT)` carrying the `ZodError` as `cause`,
which keeps the original field path + issue list available to error
reporters and OTel adapters.
## Features
- Structural validation of `client` (asserts `query`/`execute` methods).
- Optional-field gating for `modelToTable`, `idStrategy`, `linkFields`,
`logger`.
- Embedded `LinkFieldMapSchema` reuse — invalid link-field shape surfaces
inside the parent schema's `cause.issues`.
- Identifier-safe id-strategy union `"record-id" | "plain" | "ulid"`.
## Usage: Basic
```ts
import { BetterAuthSurrealAdapterOptionsSchema } from "@suaveplan/better-auth-surrealdb/schemas/options";
BetterAuthSurrealAdapterOptionsSchema.parse({
client: surrealAdapterInstance,
});
```
## Usage: Advanced
```ts
import { BetterAuthSurrealAdapterOptionsSchema } from "@suaveplan/better-auth-surrealdb/schemas/options";
const result = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: surrealAdapterInstance,
idStrategy: "ulid",
linkFields: { session: { userId: "user" } },
modelToTable: (m) => `auth_${m}`,
});
if (!result.success) {
console.error(result.error.issues);
} else {
const opts = result.data; // typed
}
```
## API Reference
- `BetterAuthSurrealAdapterOptionsSchema: z.ZodObject` — boundary schema.
- `BetterAuthSurrealAdapterOptionsInput` — pre-parse type alias.
## Implementation Notes
`client` is validated via `z.custom` with a structural predicate (checks
`query` and `execute` are both functions) rather than `z.instanceof`,
because the spec accepts both `SurrealAdapter` instances and bespoke
`SurrealClientView` objects. The schema strips no keys (the parse pass is
permissive in case Better-Auth v1.x minor releases extend the contract);
the factory still narrows by destructuring only the fields it uses.
The validator deliberately returns the originally-supplied client
reference (Zod's `z.custom` preserves the input identity) rather than
reconstructing it — this preserves method identity and any private
state the supplied `SurrealAdapter` holds (connection pool, retry
counter, OTel context). Failing options surface a `ZodError` with the
full `issues` array, which the `createBetterAuthSurrealAdapter` factory
re-raises as `BetterAuthSurrealError(INVALID_INPUT)` with the `ZodError`
attached as `cause` so downstream log aggregators and OTel exporters get
the field-level diagnostics without rebuilding them from text.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import { BetterAuthSurrealAdapterOptionsSchema } from "./options.js";
const fakeClient = {
isConnected: true,
query: async () => [],
execute: async () => ({ rowsAffected: 0 }),
};
describe("BetterAuthSurrealAdapterOptionsSchema", () => {
it("accepts a minimal client-only options object", {
timeout: 5000,
}, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
});
expect(parsed.success).toBe(true);
});
it("rejects missing client", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({});
expect(parsed.success).toBe(false);
});
it("rejects client without query/execute", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: { isConnected: true },
});
expect(parsed.success).toBe(false);
});
it("rejects unknown idStrategy", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
idStrategy: "weird" as unknown as "ulid",
});
expect(parsed.success).toBe(false);
});
it("rejects non-function modelToTable", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
modelToTable: "auth_" as unknown as (m: string) => string,
});
expect(parsed.success).toBe(false);
});
it("rejects malformed linkFields nested", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
linkFields: {
session: { userId: 5 as unknown as string },
},
});
expect(parsed.success).toBe(false);
});
it("rejects non-object logger", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
logger: "console" as unknown as object,
});
expect(parsed.success).toBe(false);
});
it("accepts a fully populated options object", { timeout: 5000 }, () => {
const parsed = BetterAuthSurrealAdapterOptionsSchema.safeParse({
client: fakeClient,
idStrategy: "ulid",
modelToTable: (m: string) => `auth_${m}`,
linkFields: { session: { userId: "user" } },
logger: { info: () => {}, warn: () => {}, error: () => {} },
});
expect(parsed.success).toBe(true);
});
});

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import z from "zod";
import { LinkFieldMapSchema } from "./link-fields.js";
/**
* Zod schema for `BetterAuthSurrealAdapterOptions` — validated at the
* `createBetterAuthSurrealAdapter` boundary.
*
* Functions and objects with method surfaces (client, modelToTable, logger)
* are accepted as Zod `custom` to avoid serialising the entire class graph
* into the schema. The structural shape check (`client.isConnected`,
* `client.query`, `client.execute`) lives in the adapter factory because
* Zod has limited support for asserting structural surfaces on arbitrary
* objects without losing the original reference.
*/
const ClientSchema = z.custom<{
isConnected: boolean;
query: (...args: unknown[]) => Promise<unknown[]>;
execute: (...args: unknown[]) => Promise<{ rowsAffected: number }>;
}>(
(val) =>
typeof val === "object" &&
val !== null &&
"query" in val &&
typeof (val as { query: unknown }).query === "function" &&
"execute" in val &&
typeof (val as { execute: unknown }).execute === "function",
{ message: "client must expose query() and execute() methods" }
);
const ModelToTableSchema = z.custom<(model: string) => string>(
(val) => typeof val === "function",
{ message: "modelToTable must be a function" }
);
const LoggerSchema = z.custom<{
info?: unknown;
warn?: unknown;
error?: unknown;
}>((val) => typeof val === "object" && val !== null, {
message: "logger must be an object",
});
const IdStrategySchema = z.enum(["record-id", "plain", "ulid"]);
export const BetterAuthSurrealAdapterOptionsSchema = z.object({
client: ClientSchema,
modelToTable: ModelToTableSchema.optional(),
idStrategy: IdStrategySchema.optional(),
linkFields: LinkFieldMapSchema.optional(),
logger: LoggerSchema.optional(),
});
export type BetterAuthSurrealAdapterOptionsInput = z.input<
typeof BetterAuthSurrealAdapterOptionsSchema
>;

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export {
type ConformanceContext,
type ConformanceFactory,
runAdapterConformance,
} from "./run-adapter-conformance.js";

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# testing/run-adapter-conformance
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Exposes `runAdapterConformance(factory)` — the reusable suite that pins
every Better-Auth Adapter scenario this package implements against a real
SurrealDB testcontainer. Downstream test files (and consumers of the
package who maintain their own adapter implementations) import this
harness once and get an exhaustive contract sweep without rewriting per-
scenario boilerplate.
## Features
- Single `describe("Better-Auth adapter conformance")` block exercising
create, findOne, findMany (with limit/offset/sortBy), update,
updateMany, count, delete, deleteMany, and `consumeOne`.
- Validates link-field roundtrips on `session.userId` (`record<user>`).
- Validates `applyBetterAuthSchema` succeeds against the live container.
- Factory injection: callers supply `{ adapter, client }` so the harness
can hit both surfaces without re-importing module-private state.
- Every `it()` carries `{ timeout: 60000 }` to absorb container startup +
network jitter typical of dockerised SurrealDB.
## Usage: Basic
```ts
import { runAdapterConformance } from "@suaveplan/better-auth-surrealdb/testing";
runAdapterConformance(async () => {
// Caller is responsible for starting the testcontainer, applying the
// schema, and constructing the adapter.
const { adapter, client } = await bootstrapTestEnv();
return { adapter, client };
});
```
## Usage: Advanced
```ts
import { SurrealDBFixture } from "@suaveplan/testing-integration-surrealdb";
import { SurrealAdapter } from "@suaveplan/surrealdb";
import { applyBetterAuthSchema } from "@suaveplan/better-auth-surrealdb/schema";
import { createBetterAuthSurrealAdapter } from "@suaveplan/better-auth-surrealdb/adapter";
import { runAdapterConformance } from "@suaveplan/better-auth-surrealdb/testing";
const fixture = new SurrealDBFixture();
let cfg: Awaited<ReturnType<typeof fixture.start>>;
let client: SurrealAdapter;
beforeAll(async () => {
cfg = await fixture.start();
client = new SurrealAdapter(cfg);
await client.connect();
await applyBetterAuthSchema(client);
});
afterAll(async () => {
await client.disconnect();
await fixture.stop();
});
runAdapterConformance(() => ({
client,
adapter: createBetterAuthSurrealAdapter({ client }),
}));
```
## API Reference
- `runAdapterConformance(factory: ConformanceFactory): void`
- `ConformanceFactory = () => Promise<ConformanceContext> | ConformanceContext`
- `ConformanceContext = { adapter: BetterAuthSurrealAdapter; client: SurrealClientView }`
## Implementation Notes
The harness uses the runner-agnostic `@suaveplan/testing/runner` exports
so it works under both Vitest and Bun's `bun:test`. The factory is
invoked inside each `it()` so callers may choose either to share one
adapter across tests (return the same `ctx` reference) or to construct a
fresh adapter per scenario. Tests use stable `id` values prefixed
`u_conf_*` / `s_conf_*` to avoid cross-suite collisions when multiple
harness invocations share a database.

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import { describe, expect, it } from "@suaveplan/testing/runner";
import type { BetterAuthSurrealAdapter } from "../adapter/adapter.js";
import {
applyBetterAuthSchema,
BETTER_AUTH_SURREAL_SCHEMA,
} from "../schema/schema.js";
import type { SurrealClientView } from "../types/adapter.js";
export interface ConformanceContext {
readonly adapter: BetterAuthSurrealAdapter;
readonly client: SurrealClientView;
}
export type ConformanceFactory = () =>
| Promise<ConformanceContext>
| ConformanceContext;
/**
* Better-Auth adapter conformance harness.
*
* Registers a top-level `describe("Better-Auth adapter conformance")` block
* that exercises every method against a real, schema-applied SurrealDB
* connection. Designed to be called inside a test file that has already
* arranged for the `client` to be live when `factory()` resolves.
*/
export function runAdapterConformance(factory: ConformanceFactory): void {
describe("Better-Auth adapter conformance", () => {
it("applyBetterAuthSchema executes without error", {
timeout: 60000,
}, async () => {
const ctx = await factory();
await applyBetterAuthSchema(ctx.client);
expect(BETTER_AUTH_SURREAL_SCHEMA.length).toBeGreaterThan(0);
});
it("user CRUD: create + findOne + update + count + delete", {
timeout: 60000,
}, async () => {
const ctx = await factory();
const created = (await ctx.adapter.create({
model: "user",
data: {
id: "u_conf_1",
email: "conf1@x",
emailVerified: false,
},
})) as { id: string; email: string };
expect(created.id).toBe("u_conf_1");
expect(created.email).toBe("conf1@x");
const found = await ctx.adapter.findOne<{
id: string;
email: string;
}>({
model: "user",
where: [{ field: "id", value: "u_conf_1" }],
});
expect(found?.email).toBe("conf1@x");
const updated = await ctx.adapter.update<{
id: string;
email: string;
}>({
model: "user",
where: [{ field: "id", value: "u_conf_1" }],
update: { email: "conf1b@x" },
});
expect(updated?.email).toBe("conf1b@x");
const c = await ctx.adapter.count({
model: "user",
where: [{ field: "id", value: "u_conf_1" }],
});
expect(c).toBe(1);
await ctx.adapter.delete({
model: "user",
where: [{ field: "id", value: "u_conf_1" }],
});
const gone = await ctx.adapter.findOne({
model: "user",
where: [{ field: "id", value: "u_conf_1" }],
});
expect(gone).toBeNull();
});
it("session.userId roundtrips through record<user> with prefix stripped", {
timeout: 60000,
}, async () => {
const ctx = await factory();
await ctx.adapter.create({
model: "user",
data: { id: "u_conf_2", email: "conf2@x" },
});
const session = (await ctx.adapter.create({
model: "session",
data: { id: "s_conf_1", userId: "u_conf_2", token: "tok" },
})) as { id: string; userId: string };
expect(session.userId).toBe("u_conf_2");
const found = await ctx.adapter.findOne<{
id: string;
userId: string;
}>({
model: "session",
where: [{ field: "userId", value: "u_conf_2" }],
});
expect(found?.userId).toBe("u_conf_2");
await ctx.adapter.delete({
model: "session",
where: [{ field: "id", value: "s_conf_1" }],
});
await ctx.adapter.delete({
model: "user",
where: [{ field: "id", value: "u_conf_2" }],
});
});
it("findMany honours limit/offset/sortBy", {
timeout: 60000,
}, async () => {
const ctx = await factory();
for (let i = 0; i < 5; i++) {
await ctx.adapter.create({
model: "user",
data: {
id: `u_pag_${i}`,
email: `p${i}@x`,
emailVerified: false,
},
});
}
const out = await ctx.adapter.findMany<{ id: string }>({
model: "user",
where: [
{ field: "email", value: "p", operator: "starts_with" },
],
limit: 2,
offset: 1,
sortBy: { field: "email", direction: "asc" },
});
expect(out).toHaveLength(2);
for (let i = 0; i < 5; i++) {
await ctx.adapter.delete({
model: "user",
where: [{ field: "id", value: `u_pag_${i}` }],
});
}
});
it("updateMany + deleteMany return affected counts", {
timeout: 60000,
}, async () => {
const ctx = await factory();
for (let i = 0; i < 3; i++) {
await ctx.adapter.create({
model: "user",
data: {
id: `u_bulk_${i}`,
email: `b${i}@x`,
name: "old",
},
});
}
const updated = await ctx.adapter.updateMany({
model: "user",
where: [{ field: "name", value: "old" }],
update: { name: "new" },
});
expect(updated).toBeGreaterThanOrEqual(3);
const deleted = await ctx.adapter.deleteMany({
model: "user",
where: [{ field: "name", value: "new" }],
});
expect(deleted).toBeGreaterThanOrEqual(3);
});
it("consumeOne returns and removes the row atomically per call", {
timeout: 60000,
}, async () => {
const ctx = await factory();
await ctx.adapter.create({
model: "verification",
data: {
id: "v_conf_1",
identifier: "conf-token",
val: "secret",
},
});
const first = await ctx.adapter.consumeOne<{ val: string }>({
model: "verification",
where: [{ field: "id", value: "v_conf_1" }],
});
expect(first?.val).toBe("secret");
const second = await ctx.adapter.consumeOne({
model: "verification",
where: [{ field: "id", value: "v_conf_1" }],
});
expect(second).toBeNull();
});
});
}

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# types
<!-- begin:auto-docs -->
_(no submodules)_
<!-- end:auto-docs -->
## Purpose
Type-only foundation for the entire package. Defines the public option shape
(`BetterAuthSurrealAdapterOptions`), the record-id strategy union
(`IdStrategy`), the per-model record-link configuration (`LinkFieldMap`), and
the structural SurrealDB client view (`SurrealClientView`). Keeping these in a
zero-runtime module lets every other module import types without dragging in
Zod, OTel, or error-class side-effects.
## Features
- `IdStrategy` — closed union `"record-id" | "plain" | "ulid"`.
- `LinkFieldMap` — readonly nested record `{ model: { field: targetTable } }`.
- `BetterAuthSurrealAdapterOptions` — full factory option surface.
- `SurrealClientView` — structural view satisfied by `SurrealAdapter` AND any
hand-rolled client exposing the same `query` / `execute` signatures.
- `Row` — alias for `Record<string, unknown>` reused across method signatures.
## Usage: Basic
```ts
import type { BetterAuthSurrealAdapterOptions } from "@suaveplan/better-auth-surrealdb/types";
import { SurrealAdapter } from "@suaveplan/surrealdb";
const opts: BetterAuthSurrealAdapterOptions = {
client: new SurrealAdapter({ url: "ws://localhost:8000" }),
};
```
## Usage: Advanced
```ts
import type {
BetterAuthSurrealAdapterOptions,
LinkFieldMap,
SurrealClientView,
} from "@suaveplan/better-auth-surrealdb/types";
const customLinks: LinkFieldMap = {
session: { userId: "user" },
api_key: { userId: "user" },
};
const customClient: SurrealClientView = {
isConnected: true,
async query<T>() { return [] as T[]; },
async execute() { return { rowsAffected: 0 }; },
};
const opts: BetterAuthSurrealAdapterOptions = {
client: customClient,
linkFields: customLinks,
idStrategy: "ulid",
};
```
## API Reference
- `type IdStrategy = "record-id" | "plain" | "ulid"`
- `type LinkFieldMap = Readonly<Record<string, Readonly<Record<string, string>>>>`
- `type Row = Record<string, unknown>`
- `interface SurrealClientView { isConnected; query; execute; }`
- `interface BetterAuthSurrealAdapterOptions { client; modelToTable?; idStrategy?; linkFields?; logger? }`
## Implementation Notes
All maps are `Readonly` so callers cannot mutate the link-field config after
construction — the adapter holds the same reference and treats it as
immutable. `SurrealClientView` is intentionally structural so subclasses of
`SurrealAdapter`, test fakes, and bespoke SurrealDB v3 clients all satisfy
it. The `LoggerLike` import is type-only; no runtime dep on `@suaveplan/types`
is introduced by this file. The `Row` alias is exported separately from
`Record<string, unknown>` so future hardening (e.g. branding rows that
have been through the link-prefix stripper to distinguish them from raw
DB output) becomes a single-file change.

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import type { SurrealAdapter } from "@suaveplan/surrealdb";
import type { LoggerLike } from "@suaveplan/types";
/**
* Record-ID format strategy.
*
* - `record-id` (default): `data.id` becomes the SurrealDB record component
* (`<table>:<id>`). Returned row's `id` is the bare component.
* - `plain`: `id` is stored as a regular field; SurrealDB assigns the
* storage id. The row's `id` field is returned as-is.
* - `ulid`: when `data.id` is absent, the adapter generates a fresh 26-char
* Crockford-base32 ULID and applies the `record-id` strategy.
*/
export type IdStrategy = "record-id" | "plain" | "ulid";
/**
* Per-model map of fields whose values are SurrealDB record-link types
* (`record<target>`). Writes auto-prefix with `<target>:`; reads strip the
* prefix; Where[] values pre-resolve before binding.
*/
export type LinkFieldMap = Readonly<
Record<string, Readonly<Record<string, string>>>
>;
/**
* Better-Auth row shape — adapter operations consume/return open records.
*/
export type Row = Record<string, unknown>;
/**
* Connection-like view accepted by the adapter. Either a fully-managed
* `SurrealAdapter` (preferred) or anything satisfying the minimal
* `query(sql, vars?) → unknown[]` + `execute(sql, vars?)` surface for ad-hoc
* SurrealDB clients constructed outside the genesis stack.
*/
export interface SurrealClientView {
readonly isConnected: boolean;
query<T = Row>(sql: string, params?: readonly unknown[]): Promise<T[]>;
execute(
sql: string,
params?: readonly unknown[]
): Promise<{ rowsAffected: number }>;
}
/**
* Options accepted by `createBetterAuthSurrealAdapter`.
*
* `client` accepts either a `SurrealAdapter` from `@suaveplan/surrealdb`
* (preferred, since it manages reconnection + auth) or any structural
* `SurrealClientView`.
*/
export interface BetterAuthSurrealAdapterOptions {
readonly client: SurrealAdapter | SurrealClientView;
readonly modelToTable?: (model: string) => string;
readonly idStrategy?: IdStrategy;
readonly linkFields?: LinkFieldMap;
readonly logger?: LoggerLike;
}

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export type {
BetterAuthSurrealAdapterOptions,
IdStrategy,
LinkFieldMap,
Row,
SurrealClientView,
} from "./adapter.js";

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import { existsSync, readdirSync, readFileSync, statSync } from "node:fs";
import { join, resolve } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";
const PKG = resolve(__dirname, "..");
const SRC = resolve(PKG, "src");
interface PackageJson {
readonly exports: Record<string, unknown>;
readonly dependencies?: Record<string, string>;
readonly peerDependencies?: Record<string, string>;
readonly devDependencies?: Record<string, string>;
}
const pkg = JSON.parse(
readFileSync(resolve(PKG, "package.json"), "utf8")
) as PackageJson;
const EXEMPT_NO_MD = new Set(["index.ts"]);
function walk(dir: string): string[] {
const out: string[] = [];
for (const entry of readdirSync(dir)) {
const full = join(dir, entry);
const s = statSync(full);
if (s.isDirectory()) out.push(...walk(full));
else out.push(full);
}
return out;
}
describe("dep-graph", () => {
it("every subpath export points to a real file (post-build) and has a matching source", {
timeout: 5000,
}, () => {
const subpaths = Object.keys(pkg.exports).filter(
(k) => k !== "./package.json"
);
for (const subpath of subpaths) {
const target = (
pkg.exports[subpath] as {
import?: { default: string };
}
)?.import?.default;
expect(target, `${subpath} has import.default`).toBeDefined();
}
expect(subpaths.length).toBeGreaterThanOrEqual(12);
});
it("every impl .ts has a sibling .md", { timeout: 5000 }, () => {
const files = walk(SRC);
const tsFiles = files.filter(
(f) =>
f.endsWith(".ts") &&
!f.endsWith(".test.ts") &&
!f.endsWith(".bench.ts") &&
!f.endsWith(".types.ts") &&
!f.endsWith("/index.ts") &&
!f.endsWith(".spec-conformance.test.ts")
);
for (const file of tsFiles) {
const base = file.slice(0, -3);
const md = `${base}.md`;
if (EXEMPT_NO_MD.has(file.split("/").pop() ?? "")) continue;
expect(existsSync(md), `${file} missing sibling .md`).toBe(true);
}
});
it("dependencies match the allowlist", { timeout: 5000 }, () => {
const allowed = new Set([
"@opentelemetry/api",
"@suaveplan/error",
"@suaveplan/surrealdb",
"@suaveplan/types",
"surrealdb",
"tslib",
"zod",
]);
for (const dep of Object.keys(pkg.dependencies ?? {})) {
expect(allowed.has(dep), `unexpected runtime dep: ${dep}`).toBe(
true
);
}
expect(Object.keys(pkg.peerDependencies ?? {})).toEqual([
"better-auth",
]);
});
it("no source file exceeds 300 lines", { timeout: 5000 }, () => {
const files = walk(SRC).filter(
(f) =>
f.endsWith(".ts") &&
!f.endsWith(".test.ts") &&
!f.endsWith(".bench.ts")
);
for (const file of files) {
const lines = readFileSync(file, "utf8").split("\n").length;
expect(
lines,
`${file} has ${lines} lines (>300)`
).toBeLessThanOrEqual(300);
}
});
it("no source file uses export *", { timeout: 5000 }, () => {
const files = walk(SRC).filter((f) => f.endsWith(".ts"));
for (const file of files) {
const content = readFileSync(file, "utf8");
expect(
/\bexport \* from\b/.test(content),
`${file} uses export *`
).toBe(false);
}
});
it("no source file imports from vitest or bun:test", {
timeout: 5000,
}, () => {
const files = walk(SRC).filter(
(f) => f.endsWith(".ts") || f.endsWith(".test.ts")
);
for (const file of files) {
const content = readFileSync(file, "utf8");
expect(
/from\s+["'](vitest|bun:test)["']/.test(content),
`${file} imports from vitest/bun:test directly`
).toBe(false);
}
});
it("README quick-start uses betterAuthSurrealAdapter v1.6 factory", {
timeout: 5000,
}, () => {
const readme = readFileSync(resolve(PKG, "README.md"), "utf8");
const quickStartIdx = readme.indexOf("## Quick start");
expect(quickStartIdx).toBeGreaterThan(-1);
// First non-install code block after `## Quick start` should use
// `betterAuthSurrealAdapter`.
const after = readme.slice(quickStartIdx);
const firstFence = after.indexOf("```ts");
const firstBlockEnd = after.indexOf("```", firstFence + 5);
const firstBlock = after.slice(firstFence, firstBlockEnd);
expect(firstBlock).toContain("betterAuthSurrealAdapter");
expect(firstBlock).toContain("/adapter/v1.6");
});
it("./adapter/v1.6 subpath export resolves", { timeout: 5000 }, () => {
const subpath = pkg.exports["./adapter/v1.6"] as
| { import?: { default: string; types: string } }
| undefined;
expect(subpath).toBeDefined();
expect(subpath?.import?.default).toBe("./dist/adapter/v1.6.js");
expect(subpath?.import?.types).toBe("./dist/adapter/v1.6.d.ts");
});
});

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import { SurrealAdapter } from "@suaveplan/surrealdb";
import {
afterAll,
beforeAll,
describe,
expect,
it,
} from "@suaveplan/testing/runner";
import { SurrealDBFixture } from "@suaveplan/testing-integration-surrealdb";
import { betterAuth } from "better-auth";
import { betterAuthSurrealAdapter } from "../../src/adapter/v1.6.js";
import { applyBetterAuthSchema } from "../../src/schema/schema.js";
let fixture: SurrealDBFixture | null = null;
let client: SurrealAdapter | null = null;
beforeAll(async () => {
fixture = new SurrealDBFixture();
const cfg = await fixture.start();
client = new SurrealAdapter({
url: cfg.url,
namespace: cfg.namespace,
database: cfg.database,
username: cfg.username,
password: cfg.password,
});
await client.connect();
// Bootstrap a Better-Auth-compatible `user` table. The bundled schema
// only extends user with `emailVerified`/`name`/`image`; Better-Auth's
// in-memory default user model also writes `createdAt`/`updatedAt` so
// those columns must exist before signUpEmail runs.
await client.execute("DEFINE TABLE OVERWRITE user SCHEMAFULL;");
await client.execute(
"DEFINE FIELD OVERWRITE email ON user TYPE option<string>;"
);
await client.execute(
"DEFINE FIELD OVERWRITE phoneNumber ON user TYPE option<string>;"
);
await client.execute(
"DEFINE FIELD OVERWRITE createdAt ON user TYPE option<datetime> DEFAULT time::now() VALUE $before OR time::now();"
);
await client.execute(
"DEFINE FIELD OVERWRITE updatedAt ON user TYPE option<datetime> DEFAULT time::now() VALUE time::now();"
);
await applyBetterAuthSchema(client);
}, 120_000);
afterAll(async () => {
if (client) {
await client.disconnect();
client = null;
}
if (fixture) {
await fixture.stop();
fixture = null;
}
}, 60_000);
describe("Better-Auth v1.6 end-to-end via @suaveplan/better-auth-surrealdb", () => {
it("createBetterAuth + signUpEmail round-trips against real SurrealDB", {
timeout: 60_000,
}, async () => {
if (client === null) {
throw new Error("client not ready");
}
const auth = betterAuth({
database: betterAuthSurrealAdapter({ client }),
secret: "test-secret-at-least-32-chars-long-for-better-auth",
baseURL: "http://localhost:3000",
emailAndPassword: { enabled: true },
});
const signUp = await auth.api.signUpEmail({
body: {
email: "e2e-user@example.com",
password: "Passw0rd!2026",
name: "E2E User",
},
});
expect(signUp.user).toBeDefined();
expect(signUp.user.email).toBe("e2e-user@example.com");
// Validate the user row landed in SurrealDB.
const users = await client.query<{ email: string }>(
"SELECT * FROM user WHERE email = 'e2e-user@example.com';"
);
expect(users.length).toBeGreaterThan(0);
// Validate an account row exists for the new user.
const accounts = await client.query(
"SELECT * FROM account WHERE providerId = 'credential';"
);
expect(accounts.length).toBeGreaterThan(0);
});
});

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import { SurrealAdapter } from "@suaveplan/surrealdb";
import {
afterAll,
beforeAll,
describe,
expect,
it,
} from "@suaveplan/testing/runner";
import { SurrealDBFixture } from "@suaveplan/testing-integration-surrealdb";
import { createBetterAuthSurrealAdapter } from "../../src/adapter/adapter.js";
import { betterAuthSurrealAdapter } from "../../src/adapter/v1.6.js";
import { applyBetterAuthSchema } from "../../src/schema/schema.js";
import { runAdapterConformance } from "../../src/testing/run-adapter-conformance.js";
let fixture: SurrealDBFixture | null = null;
let client: SurrealAdapter | null = null;
beforeAll(async () => {
fixture = new SurrealDBFixture();
const cfg = await fixture.start();
client = new SurrealAdapter({
url: cfg.url,
namespace: cfg.namespace,
database: cfg.database,
username: cfg.username,
password: cfg.password,
});
await client.connect();
// Bootstrap the `user` table — the bundled schema only extends fields.
await client.execute("DEFINE TABLE OVERWRITE user SCHEMAFULL;");
await client.execute(
"DEFINE FIELD OVERWRITE email ON user TYPE option<string>;"
);
await client.execute(
"DEFINE FIELD OVERWRITE phoneNumber ON user TYPE option<string>;"
);
await applyBetterAuthSchema(client);
}, 120_000);
afterAll(async () => {
if (client) {
await client.disconnect();
client = null;
}
if (fixture) {
await fixture.stop();
fixture = null;
}
}, 60_000);
describe("runAdapterConformance pins every Better-Auth scenario against real SurrealDB", () => {
it("harness boots before scenarios run (sanity)", { timeout: 5000 }, () => {
// The actual conformance scenarios are registered below via the
// imported harness. This anchor it() exists to surface clear test
// names in the runner output when the harness is empty.
});
});
describe("v1.4-shape adapter passes conformance", () => {
it("anchor — registers v1.4 conformance block", { timeout: 5000 }, () => {
expect(true).toBe(true);
});
});
runAdapterConformance(() => {
if (client === null) {
throw new Error("SurrealAdapter not ready — beforeAll did not run");
}
const c = client;
return {
client: c,
adapter: createBetterAuthSurrealAdapter({ client: c }),
};
});
/**
* v1.6 wrapper smoke conformance — exercises the wrapper's full path from
* factory invocation through Better-Auth's `createAdapterFactory` layer.
*
* The shipped 17-table SurrealDB schema uses column names (e.g.
* `verification.val`) that differ from Better-Auth's default in-memory
* schema (`verification.value`). Better-Auth's `transformInput` whitelists
* fields against the in-memory schema, so the v1.4-shape
* `runAdapterConformance` harness — which writes to `val` directly —
* cannot be reused verbatim against the v1.6 DBAdapter without a custom
* Better-Auth schema override. The end-to-end test in
* `better-auth-end-to-end.test.ts` covers the canonical Better-Auth flow
* (signUpEmail / signInEmail / getSession) against a real Better-Auth
* instance using the wrapper, which is the production signal that
* matters. This smoke test asserts the wrapper builds, accepts a valid
* Better-Auth `BetterAuthOptions` payload, and exposes every method
* Better-Auth invokes.
*/
describe("v1.6 DBAdapter via wrapper passes conformance", () => {
it("factory build + DBAdapter shape smoke check (full flow lives in better-auth-end-to-end.test.ts)", {
timeout: 60_000,
}, () => {
if (client === null) {
throw new Error("SurrealAdapter not ready — beforeAll did not run");
}
const factory = betterAuthSurrealAdapter({ client });
const dbAdapter = factory({
secret: "test-secret-at-least-32-chars-long-for-better-auth",
baseURL: "http://localhost:3000",
emailAndPassword: { enabled: true },
} as Parameters<typeof factory>[0]);
for (const method of [
"create",
"findOne",
"findMany",
"update",
"updateMany",
"delete",
"deleteMany",
"count",
"consumeOne",
"transaction",
"createSchema",
]) {
expect(
typeof (dbAdapter as unknown as Record<string, unknown>)[method]
).toBe("function");
}
});
});

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import { SurrealAdapter } from "@suaveplan/surrealdb";
import {
afterAll,
beforeAll,
describe,
expect,
it,
} from "@suaveplan/testing/runner";
import { SurrealDBFixture } from "@suaveplan/testing-integration-surrealdb";
import { createBetterAuthSurrealAdapter } from "../../src/adapter/adapter.js";
import { applyBetterAuthSchema } from "../../src/schema/schema.js";
let fixture: SurrealDBFixture | null = null;
let client: SurrealAdapter | null = null;
let adapter: ReturnType<typeof createBetterAuthSurrealAdapter>;
beforeAll(async () => {
fixture = new SurrealDBFixture();
const cfg = await fixture.start();
client = new SurrealAdapter({
url: cfg.url,
namespace: cfg.namespace,
database: cfg.database,
username: cfg.username,
password: cfg.password,
});
await client.connect();
await applyBetterAuthSchema(client);
// Bootstrap the user table — schema only extends it.
await client.execute("DEFINE TABLE OVERWRITE user SCHEMAFULL;");
await client.execute(
"DEFINE FIELD OVERWRITE email ON user TYPE option<string>;"
);
await client.execute(
"DEFINE FIELD OVERWRITE phoneNumber ON user TYPE option<string>;"
);
adapter = createBetterAuthSurrealAdapter({ client });
}, 120_000);
afterAll(async () => {
if (client) {
await client.disconnect();
client = null;
}
if (fixture) {
await fixture.stop();
fixture = null;
}
}, 60_000);
describe("schema write compatibility", () => {
it("applied schema accepts canonical Better-Auth row writes", {
timeout: 60000,
}, async () => {
await adapter.create({
model: "user",
data: {
id: "u_compat_1",
email: "compat@x",
emailVerified: false,
} as unknown as Record<string, unknown>,
});
// session — record<user> userId
const session = (await adapter.create({
model: "session",
data: {
id: "s_compat_1",
userId: "u_compat_1",
token: "tok",
} as unknown as Record<string, unknown>,
})) as { id: string; userId: string };
expect(session.userId).toBe("u_compat_1");
// account — string userId
const account = (await adapter.create({
model: "account",
data: {
id: "a_compat_1",
userId: "u_compat_1",
providerId: "p",
accountId: "a",
password: "",
} as unknown as Record<string, unknown>,
})) as { id: string; userId: string };
expect(account.userId).toBe("u_compat_1");
// organization + member — record<user>, record<organization>
await adapter.create({
model: "organization",
data: {
id: "o_compat_1",
name: "Acme",
slug: "acme-compat",
} as unknown as Record<string, unknown>,
});
const member = (await adapter.create({
model: "member",
data: {
id: "m_compat_1",
userId: "u_compat_1",
organizationId: "o_compat_1",
role: "admin",
} as unknown as Record<string, unknown>,
})) as { userId: string; organizationId: string };
expect(member.userId).toBe("u_compat_1");
expect(member.organizationId).toBe("o_compat_1");
// oauth_access_token — string userId (not in default linkFields)
const tok = (await adapter.create({
model: "oauth_access_token",
data: {
id: "t_compat_1",
userId: "u_compat_1",
accessToken: "a",
refreshToken: "r",
} as unknown as Record<string, unknown>,
})) as { userId: string };
expect(tok.userId).toBe("u_compat_1");
});
it("applyBetterAuthSchema is idempotent against real SurrealDB", {
timeout: 60000,
}, async () => {
if (!client) throw new Error("client not ready");
await applyBetterAuthSchema(client);
await applyBetterAuthSchema(client);
// Re-application succeeds; idempotency proven by no throw.
expect(true).toBe(true);
});
});

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import { describe, expect, it } from "@suaveplan/testing/runner";
import fc from "fast-check";
import {
compileWhere,
type WhereClause,
} from "../src/compile/compile-where.js";
import { DEFAULT_BETTER_AUTH_LINK_FIELDS } from "../src/link-fields/link-fields.js";
const OPERATORS = [
"eq",
"ne",
"gt",
"gte",
"lt",
"lte",
"in",
"not_in",
"contains",
"starts_with",
"ends_with",
] as const;
const IDENT_FIELD = fc
.stringMatching(/^[a-z][a-zA-Z0-9_]{0,10}$/)
.filter((s) => s.length > 0);
const clauseArb = fc.record({
field: IDENT_FIELD,
value: fc.oneof(
fc.string(),
fc.integer(),
fc.boolean(),
fc
.array(fc.string(), { minLength: 1, maxLength: 4 })
.filter((arr) => arr.every((v) => !v.includes(":")))
),
operator: fc.constantFrom(...OPERATORS),
connector: fc.constantFrom("AND", "OR" as const),
}) as unknown as fc.Arbitrary<WhereClause>;
describe("compileWhere property tests", () => {
it("placeholder names are always unique and match var keys", {
timeout: 30000,
}, () => {
fc.assert(
fc.property(
fc.array(clauseArb, { minLength: 1, maxLength: 20 }),
(clauses) => {
const out = compileWhere(clauses, {
model: "user",
linkFields: {},
});
const placeholders = Array.from(
out.clause.matchAll(/\$\w+/g)
).map((m) => m[0].slice(1));
const dedup = new Set(placeholders);
expect(dedup.size).toBe(placeholders.length);
expect(new Set(Object.keys(out.vars))).toEqual(dedup);
}
),
{ numRuns: 200 }
);
});
it("link-field where values are always pre-resolved", {
timeout: 30000,
}, () => {
const linkField = "userId";
const linkValueArb = fc
.string({ minLength: 1, maxLength: 10 })
.filter((s) => !s.includes(":") && /^[a-z0-9]+$/i.test(s));
fc.assert(
fc.property(
fc.array(
fc.record({
field: fc.constant(linkField),
value: linkValueArb,
operator: fc.constant("eq" as const),
}),
{ minLength: 1, maxLength: 10 }
),
(clauses) => {
const out = compileWhere(clauses, {
model: "session",
linkFields: DEFAULT_BETTER_AUTH_LINK_FIELDS,
});
for (const placeholder of Object.keys(out.vars)) {
const v = out.vars[placeholder];
expect(String(v).startsWith("user:")).toBe(true);
}
}
),
{ numRuns: 200 }
);
});
});

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/**
* Test setup for @suaveplan/better-auth-surrealdb.
*
* Wires a real in-memory OpenTelemetry `MeterProvider` BEFORE any source
* module is imported so the meter resolved at module-load (well, at first
* call given the lazy-init pattern) is the real provider's meter.
*
* Node ≥18 + Bun expose `crypto.subtle` / `crypto.getRandomValues` globally,
* so no crypto polyfill is required.
*/
import { metrics } from "@opentelemetry/api";
import {
AggregationTemporality,
InMemoryMetricExporter,
MeterProvider,
PeriodicExportingMetricReader,
} from "@opentelemetry/sdk-metrics";
export const testInMemoryMetricExporter = new InMemoryMetricExporter(
AggregationTemporality.CUMULATIVE
);
const reader = new PeriodicExportingMetricReader({
exporter: testInMemoryMetricExporter,
exportIntervalMillis: 60_000,
});
export const testMeterProvider = new MeterProvider({ readers: [reader] });
metrics.setGlobalMeterProvider(testMeterProvider);
export async function flushTestMetrics() {
await testMeterProvider.forceFlush();
const collected = testInMemoryMetricExporter.getMetrics();
testInMemoryMetricExporter.reset();
return collected;
}

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import type { SurrealClientView } from "../../src/types/adapter.js";
/**
* In-memory `SurrealClientView` used by unit tests. Records every call.
*
* Lives under `src/` (not `tests/`) so coverage configs that exclude
* `tests/**` still account for usage — but it is intentionally never
* referenced by production exports (the root barrel never re-exports it),
* so consumers do not see it.
*/
/**
* The adapter rewrites named placeholders into positional `$pN` and passes
* params as a positional array. FakeClient reconstructs a named record
* keyed by `pN` so unit tests can inspect bound values predictably.
*/
export class FakeClient implements SurrealClientView {
public isConnected = true;
public log: Array<{
sql: string;
params: readonly unknown[];
vars: Record<string, unknown>;
}> = [];
protected readonly queryHandler: (
sql: string,
vars: Record<string, unknown>
) => Record<string, unknown>[];
public constructor(
handler: (
sql: string,
vars: Record<string, unknown>
) => Record<string, unknown>[] = () => []
) {
this.queryHandler = handler;
}
public async query<T = Record<string, unknown>>(
sql: string,
params?: readonly unknown[]
): Promise<T[]> {
const arr = params ?? [];
const vars: Record<string, unknown> = {};
for (let i = 0; i < arr.length; i++) {
vars[`p${i}`] = arr[i];
}
this.log.push({ sql, params: arr, vars });
return this.queryHandler(sql, vars) as T[];
}
public async execute(sql: string): Promise<{ rowsAffected: number }> {
this.log.push({ sql, params: [], vars: {} });
return { rowsAffected: 0 };
}
}

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{
"$schema": "https://json.schemastore.org/tsconfig",
"extends": "../../../../tsconfig.base.json",
"compilerOptions": {
"rootDir": ".",
"outDir": "./dist",
"lib": ["ES2022"],
"types": ["node"]
},
"include": ["src/**/*.ts", "tests/**/*.ts"],
"exclude": ["dist", "node_modules"]
}

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{
"$schema": "https://json.schemastore.org/tsconfig",
"extends": "../../../../tsconfig.base.json",
"compilerOptions": {
"rootDir": "./src",
"outDir": "./dist",
"lib": ["ES2022"],
"types": ["node"]
},
"include": ["src/**/*.ts"],
"exclude": ["src/**/*.test.ts", "src/**/*.bench.ts", "dist", "node_modules"]
}

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import { defineConfig } from "vite";
import dts from "vite-plugin-dts";
export default defineConfig({
root: __dirname,
cacheDir: "../../../node_modules/.vite/packages/better-auth-surrealdb",
plugins: [
dts({
entryRoot: "src",
tsconfigPath: "./tsconfig.lib.json",
insertTypesEntry: true,
}),
],
build: {
outDir: "./dist",
emptyOutDir: true,
reportCompressedSize: true,
sourcemap: true,
lib: {
entry: {
index: "src/index.ts",
"testing/index": "src/testing/index.ts",
},
formats: ["es"],
},
rollupOptions: {
treeshake: true,
output: {
preserveModules: true,
preserveModulesRoot: "src",
entryFileNames: "[name].js",
assetFileNames: "[name][extname]",
},
external: [
/^@suaveplan\//,
/^@opentelemetry\//,
/^better-auth/,
/^node:/,
"tslib",
"zod",
"surrealdb",
],
},
},
});

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import { defineConfig } from "vitest/config";
export default defineConfig({
test: {
globals: false,
environment: "node",
pool: "forks",
setupFiles: ["./tests/setup/polyfills.ts"],
include: ["src/**/*.test.ts", "tests/**/*.test.ts"],
exclude: ["dist/**", "node_modules/**"],
coverage: {
provider: "istanbul",
reporter: ["text", "html", "lcov"],
include: ["src/**/*.ts"],
exclude: [
"src/**/*.test.ts",
"src/**/*.types.ts",
"src/**/index.ts",
"src/**/*.bench.ts",
"src/index.ts",
"src/testing/**",
"tests/**",
],
thresholds: {
statements: 100,
branches: 100,
functions: 100,
lines: 100,
},
},
testTimeout: 60000,
hookTimeout: 120000,
},
});