fix(db): preserve direct row select types - #1892
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Included review availability: Your plan provides up to 8 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughDirect whole-row selection type inference now accounts for nullable rows from unmatched left joins. Type and runtime oracle tests cover optional row fields and the empty-object result. ChangesWhole-Row Selection Types
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: ⚪ Minimal · up to Direct whole-row selections have matching type and runtime coverage for unmatched left joins. No actionable merge risk remains beyond normal checks. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change aligns inferred row types with fields already returned at runtime. The reviewed query path does not show a new data-access route or weakened control, but broader security coverage is incomplete. Retained concerns Security review detailsSecurity Blast Radius
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In `@packages/db/src/query/builder/types.ts`:
- Around line 417-418: Update the `IsTrueRef<TSelectObject>` direct-row branch
to match `processMerge`’s unmatched-left-join result: use
`ExtractRef<TSelectObject> | undefined` only if it returns `undefined`; if it
returns `{}`, represent that branch with a keyed empty-object type rather than
`{}` so row field names remain available.
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.changeset/preserve-direct-row-select-types.mdpackages/db/src/query/builder/types.tspackages/db/tests/query/virtual-row-fields-oracle.test-d.tspackages/db/tests/query/virtual-row-fields-oracle.test.ts
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Direct whole-row selections now infer the same row shape that the query returns at runtime. The type keeps virtual row fields and preserves optional properties.
For example, this selection returns a published row, not a projected value:
The result type now includes
$key,$synced,$origin, and$collectionId. An optional source property also remains optional in the result.Cause
ResultTypeFromSelectprocessed every top-level object as a projection. A direct row ref therefore entered the recursive projection path instead of the whole-row extraction path.The query result type also flattened selected object types. That operation changed optional properties into required properties whose values included
undefined.Fix
The type logic now detects canonical top-level row refs before it processes projections. It extracts the complete row type for those refs.
Strict shape comparison separates direct refs from spread-derived objects. Projections such as
{ ...child }, changed fields, and omitted fields continue through recursive projection logic.An unmatched nullable join needs a separate type branch. Runtime merges a direct selection into a new object, so an unmatched row produces
{}instead ofundefined. The type models this branch as a keyed empty object. Callers can still access known row fields, and those field values includeundefined.The result type keeps objects with optional keys unflattened. This preserves optional modifiers, although an IDE can show the underlying intersection.
Invariants
Scope
This change does not change runtime query behavior. It changes inferred types to match the existing runtime results.
Verification
The paired runtime and type oracles cover direct rows, optional properties, and unmatched nullable joins. They also keep negative coverage for projected and nested values.
Local checks passed:
All GitHub checks also pass on
8e1d7070.