Paul Rastoin 14dacd8d35 [Slow db query] Resolve applicationId from cache in FileStorageService (#22870)
## Context

Sentry flagged a recurring slow DB query (TWENTY-SERVER-HZJ): `SELECT
... FROM core.application WHERE workspaceId = $1 AND universalIdentifier
= $2 AND deletedAt IS NULL LIMIT 1`, emitted on every file write under
`POST /graphql` (record avatar/file fields) and `POST /metadata`.

`FileStorageService` re-resolved the owning application row from
`core.application` by `(workspaceId, universalIdentifier)` on every file
write, uncached and synchronously in the request path. The row was only
used to recover `application.id`. The workspace cache already exposes
this mapping via `flatApplicationMaps.idByUniversalIdentifier`.

Closes twentyhq/core-team-issues#2668.

## Changes

- Injected `WorkspaceCacheService` into `FileStorageService` in place of
the `ApplicationEntity` repository.
- Added `resolveApplicationIdOrThrow`: resolves `applicationId` from
`flatApplicationMaps.idByUniversalIdentifier` on the normal
(already-committed) path, throwing
`FileStorageException(FILE_NOT_FOUND)` on a cache miss. When a
`queryRunner` is provided (application-creating transactions, where the
freshly created row is not yet in cache), it keeps the DB read through
`queryRunner.manager` so it can see uncommitted rows.
- Added `resolveApplicationUniversalIdentifierOrThrow` for the by-id
lookup in `deleteByFileId`, resolved from `flatApplicationMaps.byId`.
- Applied the cache path to `writeFile`, `createPendingFile`,
`deleteFile`, `deleteFolder`, and `deleteByFileId`. Only `writeFile`
carries a `queryRunner`; the others never do.
- Updated `FileStorageModule` to import `WorkspaceCacheModule` and drop
the now-unused `ApplicationEntity` repository registration.

No migration needed: a partial unique composite index on
`(universalIdentifier, workspaceId) WHERE deletedAt IS NULL AND
universalIdentifier IS NOT NULL` already exists on `ApplicationEntity`
and covers the query.

## Tests

Extended `file-storage.service.spec.ts`:
- cache hit resolves `applicationId` without a DB call,
- cache miss throws `FILE_NOT_FOUND`,
- the `queryRunner` path still reads from the DB and skips the cache.

All 95 file-storage unit tests pass; typecheck, oxlint, and oxfmt are
clean on the touched files.

---
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2026-07-15 10:04:22 +00:00
2026-06-11 11:02:28 +02:00

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