feat(entity): relations — make references() readable at query time - #64
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- new relations.ts: relationsOf(entities) derives belongsTo from an entity's own references() columns and hasMany from the inbound ones, so the FK already declared IS the relation — no second syntax - thunk resolution moves to referenceBinding() in column.ts, one place the DDL projection and the map both read - names come off the key (authorId -> author); a contested name is taken by every member of the group in long form, so declaration order never renames an existing relation; what two tiers cannot separate is X_INVARIANT_VIOLATED naming both columns - 14 tests: both kinds, self-reference, composite-key join table, money, target outside the set, every collision tier Co-Authored-By: Claude <noreply@anthropic.com>
- RegistryEntry gains references(): the resolved foreign keys, both ends named. A method, not a field — a references() thunk may point at an entity two modules of an import cycle have not finished evaluating - ColumnDescription.references is now rendered from those records, so the "<table>.<column>" string a migration reads and the record a traversal reads cannot disagree; the string is written, never parsed back - relationMap() derives the whole registry and memoises against a registry generation every registration bumps, so a schema module imported late rebuilds the map instead of being missed by it; relationsOf(entries) is the same derivation over a named subset - relationNamed() refuses an unknown name with X_PRELOAD_UNKNOWN_RELATION listing the declared ones — a relation is derived, so no file lists them - 10 tests: entry and entity read one foreign key, the memo and its invalidation, the lookup and both refusals Co-Authored-By: Claude <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe entity package now resolves foreign-key metadata through the registry and derives deterministic ChangesEntity relation discovery
Estimated code review effort: 4 (Complex) | ~45 minutes Mergeability Score: 🔵 Low · up to The PR adds query-time relation discovery, but the current implementation repeatedly scans relation candidates and emits error fixes that users cannot directly apply. This creates bounded performance overhead and makes invalid-relation errors harder to remediate; the changes are mergeable with explicit owner follow-up. Sequence Diagram(s)sequenceDiagram
participant Entity
participant Registry
participant RelationAPI
participant Caller
Entity->>Registry: register references()
Caller->>RelationAPI: call relationNamed(entityName, relationName)
RelationAPI->>Registry: read registered entities and generation
Registry-->>RelationAPI: return reference metadata
RelationAPI-->>Caller: return Relation or X_PRELOAD_UNKNOWN_RELATION
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🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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This PR is large (~891 lines changed). CI is green and the feature looks solid, but I'd like a maintainer to ack before merge. Consider applying 🤖 Posted by developerz.ai — the maintainer agent, not a human. |
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Inline comments:
In `@packages/entity/src/errors.ts`:
- Around line 141-144: Update the fix construction in the declared.length
ternary so both branches provide an exact actionable target: use a concrete
pasteable relation expression for declared relations, and a valid named
documentation target or sufficient declaration context when no foreign key
exists. Ensure the associated thrown error preserves the required stable X_*
code and cause while exposing this exact fix.
In `@packages/entity/src/relations.ts`:
- Around line 150-161: Update relationsOf to index foreign-key candidates in a
single pass, maintaining separate outbound and inbound lists keyed by entity
name; then build each named relation map entry by concatenating outbound
candidates before inbound candidates, preserving the current ordering and
deduplication behavior.
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CHANGELOG.mdframework.manifest.jsonpackages/entity/CLAUDE.mdpackages/entity/README.mdpackages/entity/src/column.tspackages/entity/src/describe.tspackages/entity/src/dsl.test.tspackages/entity/src/entity.tspackages/entity/src/errors.tspackages/entity/src/index.tspackages/entity/src/registry.tspackages/entity/src/relation-map.test.tspackages/entity/src/relations.test.tspackages/entity/src/relations.tswiki/Error-Codes.md
- `X_PRELOAD_UNKNOWN_RELATION`'s fix is a `relationNamed()` call on a
relation that exists, the rest named after it — `preload()` is not a
shipped API and `preload('<name>') with one of: …` was prose. An entity
with no foreign key gets `x entities list --json`, because the
declaration it needs names a target the error cannot know.
- `relationsOf()` files each foreign key under both ends in one pass
instead of rescanning every key per entity — the whole schema squared,
paid again on the first read after every late registration. Same
outbound-then-inbound order, so collisions resolve identically.
Co-Authored-By: Claude <noreply@anthropic.com>
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This PR looks ready — CI is green and the change is routine (minor feature, experienced contributor). Consider applying a 🤖 Posted by developerz.ai — the maintainer agent, not a human. |
1 participant
Two commits: the derivation, then the seam that carries it to query time.
relationMap()/relationsFor()/relationNamed()—belongsTofrom an entity's ownreferences()columns,hasManyfrom the inbound ones. No second declaration syntax, ever: ahasMany: […]init key would be a copy of a fact the foreign key already states, free to drift from the constraint the migration emits. Names come off the key (authorId⇒author); when two want one name, every member of that group takes its long form, so declaring a second foreign key never renames the first.RegistryEntry.references()— the design fork the slice file left open. Resolved records, not the"<table>.<column>"string: that string carries physical names and a traversal reads row properties, so parsing it back would be a second, lossy resolver.ColumnDescription.referencesis now rendered from the records, so the migration's reading and the traversal's cannot disagree. A method rather than a field because a thunk may point at an entity two modules of an import cycle have not finished evaluating.X_PRELOAD_UNKNOWN_RELATIONcarries the declared names in itsfix— a relation is derived, so there is no schema file listing them to go and read. An entity with no foreign key at all gets the declaration to write instead of an empty list to pick from.relations.test.ts(derivation, self-reference, composite-key join table, money, target outside the set, every collision tier) and the newrelation-map.test.ts(entry and entity read one foreign key, the memo and its invalidation by a late registration, the lookup and both refusals).Gate:
bun run verify12/17 with the 5 honest skips; reference-app gate 10/17, 7 pinned — both unchanged. Nothing consumes the map yet; a preload is the next slice.🤖 Generated with Claude Code
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New Features
belongsToandhasManyrelationships.Documentation