objectstack-ai · os-help · Aug 10, 2026 · Aug 10, 2026 · Aug 10, 2026
diff --git a/.changeset/refuse-bulk-file-field-write.md b/.changeset/refuse-bulk-file-field-write.md
@@ -0,0 +1,50 @@
+---
+"@objectstack/service-storage": patch
+"@objectstack/spec": patch
+---
+
+fix(service-storage): a predicate update writing a file field is refused, instead of giving N records one file id (#7102)
+
+`file-reference-lifecycle.ts` states **exclusive ownership** in its module
+header: at most one `(object, record, field)` slot owns a `sys_file`, so
+copying an already-owned id into a second slot copies the bytes rather than
+sharing the row. The property that buys is that read authorisation for a
+file's bytes derives from exactly one parent record — writing a private
+record's file id into a world-readable one cannot widen who can read it.
+
+**Before.** A predicate update
+(`engine.update(obj, { avatar: 'fileX' }, { multi: true, where: … })`) had one
+payload for N matched rows — `driver.updateMany` takes one `SET` clause — so
+`beforeUpdate` resolved ONE copy and the driver wrote it to **all** matched
+records. `afterUpdate` then claimed it for the first row; `claimFile` never
+steals, so the rest logged `already owned by …` and moved on. Three matched
+records ended up referencing one file that one of them owned, with read
+authorisation for those bytes decided by a third record — exactly the
+widening the design exists to prevent. Two log warnings were the only signal,
+and nothing failed.
+
+**After.** That write is refused, in `beforeUpdate`, before the driver runs:
+
+```
+FILE_FIELD_BULK_WRITE_REFUSED / 400  (FileFieldBulkWriteError)
+```
+
+an ADR-0112 envelope error carrying a registered `code` and a 4xx `status`, so
+the REST layer answers `400` rather than promoting a bare `Error` to a `500`.
+Nothing is written, nothing is copied, and no `sys_file` row is read. The
+remedy is the caller's: update each record separately, so each one gets a file
+it owns.
+
+**Scope of the refusal.** It fires only when a file **id token** reaches a
+file-class field through a predicate update — the one shape that produces the
+shared id, decided by `isFileIdToken`, the same arbiter copy-on-claim and the
+read resolver already use. Three predicate writes that own nothing are
+deliberately unaffected and keep working per row: clearing a file field
+(`{ avatar: null }`), writing an external URL, and writing a legacy inline
+blob — each releases the file its own row's slot owned. Single-record updates,
+inserts and every delete path are byte-identical to before.
+
+`FILE_FIELD_BULK_WRITE_REFUSED` is registered in `@objectstack/spec`'s
+`ERROR_CODE_LEDGER` under `@objectstack/service-storage` (ADR-0112 D3), so the
+code is a catalogued wire value rather than an unregistered string the REST
+layer would mint by side effect.
diff --git a/content/docs/references/api/analytics.mdx b/content/docs/references/api/analytics.mdx
@@ -44,7 +44,7 @@ const result = AnalyticsEndpoint.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; title?: string; measures: object[]; dimensions: object[] }[]` | ✅ | Available cubes, each as the `CubeMeta` discovery projection — the cube name, its title, and the measures/dimensions a client may name in a query. A bare array: there is no `cubes` wrapper object, and no cube `sql` is published. |
 
@@ -79,7 +79,7 @@ const result = AnalyticsEndpoint.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ rows: Record<string, any>[]; fields: object[]; sql?: string }` | ✅ |  |
 
@@ -93,7 +93,7 @@ const result = AnalyticsEndpoint.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ sql: string; params: any[] }` | ✅ |  |
 

diff --git a/content/docs/references/api/auth.mdx b/content/docs/references/api/auth.mdx
@@ -117,7 +117,7 @@ const result = AuthProvider.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ session: object; user: object; token?: string }` | ✅ |  |
 
@@ -153,7 +153,7 @@ const result = AuthProvider.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ id: string; email: string; emailVerified: boolean; name: string; … }` | ✅ |  |
 

diff --git a/content/docs/references/api/automation-api.mdx b/content/docs/references/api/automation-api.mdx
@@ -119,7 +119,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; label: string; description?: string; successMessage?: string; … }` | ✅ | The created flow definition |
 
@@ -144,7 +144,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; deleted: boolean }` | ✅ |  |
 
@@ -187,7 +187,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; label: string; description?: string; successMessage?: string; … }` | ✅ | Full flow definition |
 
@@ -213,7 +213,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ id: string; flowName: string; flowVersion?: integer; status: Enum<'pending' \| 'running' \| 'paused' \| 'completed' \| 'failed' \| 'cancelled' \| … +2 more>; … }` | ✅ | Full execution log with step details |
 
@@ -241,7 +241,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ flows: object[]; total?: integer; nextCursor?: string; hasMore: boolean }` | ✅ |  |
 
@@ -269,7 +269,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ runs: object[]; total?: integer; nextCursor?: string; hasMore: boolean }` | ✅ |  |
 
@@ -295,7 +295,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; enabled: boolean }` | ✅ |  |
 
@@ -325,7 +325,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ success: boolean; output?: any; error?: string; durationMs?: number }` | ✅ |  |
 
@@ -351,7 +351,7 @@ const result = AutomationApiErrorCode.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **data** | `{ name: string; label: string; description?: string; successMessage?: string; … }` | ✅ | The updated flow definition |
 

diff --git a/content/docs/references/api/batch.mdx b/content/docs/references/api/batch.mdx
@@ -55,7 +55,7 @@ const result = BatchConfigSchema.parse(data);
 | :--- | :--- | :--- | :--- |
 | **id** | `string` | optional | Record ID if operation succeeded |
 | **success** | `boolean` | ✅ | Whether this record was processed successfully |
-| **errors** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }[]` | optional | Array of errors if operation failed. Branch on `errors[0].code` — an atomic batch that rolled back marks rows that were written then undone with code ROLLED_BACK and rows never reached with NOT_ATTEMPTED, while the causal row keeps its own error (#4793). |
+| **errors** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }[]` | optional | Array of errors if operation failed. Branch on `errors[0].code` — an atomic batch that rolled back marks rows that were written then undone with code ROLLED_BACK and rows never reached with NOT_ATTEMPTED, while the causal row keeps its own error (#4793). |
 | **data** | `Record<string, any>` | optional | Full record data (if returnRecords=true) |
 | **index** | `number` | optional | Index of the record in the request array |
 | **droppedFields** | `{ object: string; fields: string[]; reason: Enum<'readonly' \| 'readonly_when' \| 'primary_key'> }[]` | optional | Write-observability (#3407/#3431/#3455): caller-supplied fields LEGALLY stripped from THIS row before it was written — static `readonly` (#2948) / TRUE `readonlyWhen` (#3042) on update, or the #3043 create-ingress strip. Per-row because a batch can drop different fields on different rows (`readonlyWhen` is record-state-dependent). Present ONLY when ≥1 field was dropped for this row; the row still succeeded (success unchanged). A single response header cannot express per-row drops, so this body field is the canonical bulk channel — REST does not emit `X-ObjectStack-Dropped-Fields` for batches. Optional — omit-when-empty keeps the shape backward-compatible. |
@@ -122,7 +122,7 @@ const result = BatchConfigSchema.parse(data);
 | Property | Type | Required | Description |
 | :--- | :--- | :--- | :--- |
 | **success** | `boolean` | ✅ | Operation success status |
-| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +257 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
+| **error** | `{ code: Enum<'VALIDATION_ERROR' \| 'INVALID_FIELD' \| 'MISSING_REQUIRED_FIELD' \| … +258 more>; message: string; category?: string; httpStatus?: integer; … }` | optional | Error details if success is false |
 | **meta** | `{ timestamp: string; duration?: number; requestId?: string; traceId?: string }` | optional | Response metadata |
 | **operation** | `Enum<'create' \| 'update' \| 'upsert' \| 'delete'>` | optional | Operation type that was performed |
 | **total** | `number` | ✅ | Total number of records in the batch |