Closes https://github.com/twentyhq/core-team-issues/issues/2732
## Problem
Workspace migration delete actions embedded the raw workspace-cache flat
entity as their `flatEntity` payload, leaking:
- `id`, `workspaceId`, `applicationId`
- raw many-to-one join columns (`objectMetadataId`,
`relationTargetFieldMetadataId`, ...)
- raw FK aggregators (`viewFieldIds`, ...)
- raw jsonb properties containing serialized relations (`settings`,
`overrides`, `configuration`)
Create actions already expose universal identifiers only. The asymmetry
made identical migrations non-portable across workspaces (payloads embed
random workspace primary keys) and caused snapshot flakiness in
integration suites.
## Fix
- Add `deleteFlatEntityForeignKeyAggregators` (raw-side counterpart of
`deleteUniversalFlatEntityForeignKeyAggregators`, following the
`flatEntityForeignKeyAggregator` /
`universalFlatEntityForeignKeyAggregator` naming of
`ALL_ONE_TO_MANY_METADATA_RELATIONS`). It strips base workspace-scoped
properties, every property registered with a `universalProperty`
counterpart in `ALL_ENTITY_PROPERTIES_CONFIGURATION_BY_METADATA_NAME`
(covers raw join columns and serialized jsonb, including cases not
modeled as many-to-one relations like `labelIdentifierFieldMetadataId`),
and raw one-to-many `...Ids` aggregators. Its scope is disjoint from the
universal-side util.
- Apply it in the delete branch of
`WorkspaceEntityMigrationBuilderService` — the single point where
delete-action `flatEntity` is attached — so the payload matches its
`MetadataUniversalFlatEntity<T>` type at runtime. Universal
`...UniversalIdentifiers` aggregators are kept (they are portable), so
`BaseUniversalDeleteWorkspaceMigrationAction` needs no type change.
- Regenerate the affected
`successful-sync-application-workspace-migration` snapshot: the delete
payload now only carries universal identifiers.
Safe downstream: the runner resolves delete targets via
`universalIdentifier` lookups in current maps and metadata events fetch
the deleted entity from maps by `entityId`; no consumer reads the
stripped properties (only create handlers consume `action.flatEntity`).
Note: the `normalizeIdCollections` mitigation flag mentioned in the
issue does not exist on `main`, so there was nothing to remove.
## Tests
- New snapshot-based unit spec for the strip util (objectMetadata and
fieldMetadata shapes, plus input immutability).
- Full twenty-server unit suite: 6922 passed.
- Integration with live DB: full `metadata/suites/application` (50
suites), object/field/index/agent metadata suites, all 26
`graphql/suites/view` suites, `failing-agent-deletion`,
`object-identifier-update-side-effect-on-view-field` — all green, no
other snapshot changes.
Paul Rastoin
49e2272fb9