fix(orm): keep omitted fields in derived relation subquery for nested includes and ordering

[ymc9]

Fixes #2830

Problem

When a to-many relation is fetched with orderBy, skip, take, cursor, or distinct, the relation is read through a derived subquery. That inner subquery only projected non-omitted columns, but the outer aggregation still referenced the dropped ones:

• nested relation joins use the omitted PK/FK → column "$$tN"."id" does not exist (the reported case)
• on PostgreSQL/MySQL, jsonb_agg(... ORDER BY "$$tN"."<field>") references the ordering column → same failure when that field is omitted at schema level (@omit) or client level, even without a nested include

Fix

The inner derived subquery now selects every field unconditionally (applyOmit: false). Omission was already applied by the outer JSON object projection in both the lateral-join dialects and SQLite, so no omitted field leaks into results. The top-level find path is unchanged.

Tests

New regression test tests/regression/test/issue-2830.test.ts covering:

• the exact repro from the issue (omit PK + orderBy + nested include)
• omitting PK and FK on a paginated relation with a nested omit
• schema-level @omit on the ordering field with a nested include

Verified on SQLite and PostgreSQL, along with the existing omit/find/delegate/computed-fields/create e2e suites.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Fixed nested related records on ordered relations when child keys are omitted, including queries using pagination or nested omission settings.
  • Fixed nested includes for ordered relations when fields are omitted through the schema.
  • Fixed ordered delegate relations so schema-omitted descendant fields stay hidden while ordering and other descendant data remain available.

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Reviewing files that changed from the base of the PR and between caef5a8 and 60f7f75.

📒 Files selected for processing (2)

• packages/orm/src/client/crud/dialects/base-dialect.ts
• tests/regression/test/issue-2830.test.ts

🚧 Files skipped from review as they are similar to previous changes (2)

• tests/regression/test/issue-2830.test.ts
• packages/orm/src/client/crud/dialects/base-dialect.ts

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📝 Walkthrough

Walkthrough

The dialect now applies omissions separately to model fields and packed delegate-descendant fields. Regression tests cover ordered nested relations, pagination, schema-level omissions, and delegate descendants.

Changes

Nested relation omissions

Layer / File(s)	Summary
Derived subquery field selection packages/orm/src/client/crud/dialects/base-dialect.ts	buildSelectAllFields gates omissions for model fields while always applying them to packed delegate-descendant fields. buildModelSelect disables omissions for fields selected into a derived subquery.
Nested relation regression coverage tests/regression/test/issue-2830.test.ts	Tests cover ordered children with omitted IDs, pagination with nested omissions, schema-level omission, and an ordered delegate relation with an omitted descendant field.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Merge Risk: ⚪ Minimal · up to 60f7f

No actionable merge-blocking issue was identified. Merge after normal checks.

Security Architecture Review

Security architecture risk: 🔵 Low · up to caef5

A narrow nested-relation case can return fields configured to be omitted from delegated models. The issue requires an application to use those models and queries; it does not itself grant database access or change application authorization.

Retained concerns

• Low · security · inferred: Disabling omission in the derived select also packs omitted delegate-descendant fields into JSON. Nested-relation projections copy that JSON, and result processing merges its fields into the returned object without reapplying omission.

Security review details

Security Blast Radius

• inferred — Exposure is limited to data the application can already read, but an affected query can pass omitted delegate-descendant values into its returned payload. The independently exposed scope depends on the application's schema and API handling of that payload.

Security Findings and Attack Paths

• inferred — The retained sensitive-data-exposure finding follows an internal query path: omitted descendant fields enter packed JSON in the derived select, are copied into nested-relation JSON, and are merged into the returned row. No new database privilege is required or established by this trace.

Trust Boundaries and Controls

• observed — The outer projection enforces omission for ordinary fields, but treats delegate JSON as already suitable for output. Result processing removes its internal marker only after merging its contents.

Hardening Proposals

• proposed — Keep fields needed internally for joins, ordering, and delegate identity, while filtering delegate-descendant fields before they enter returned relation JSON. Cover query-, client-, and schema-level omission in nested delegated-relation tests.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main ORM fix: preserving omitted fields in derived relation subqueries for nested includes and ordering.
Linked Issues check	✅ Passed	Issue [#2830] requires required child columns to remain available when an ordered relation omits id and includes grandchildren. buildModelSelect now calls buildSelectAllFields with `applyOmit: f…
Out of Scope Changes check	✅ Passed	The reviewed changes contain one derived-subquery selection change and regression tests for issue [#2830]. The delegate-descendant handling preserves the required omission behavior within the same que…

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✨ Finishing Touches 💡 1

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packages/orm/src/client/crud/dialects/base-dialect.ts

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
In `@packages/orm/src/client/crud/dialects/base-dialect.ts`:
- Line 1464: Update the outer delegate JSON projection around shouldOmitField so
omitted descendant fields are excluded from `$delegate$...` values, while
keeping fields needed by the derived subquery for joins and ordering. Add a
regression test for an ordered delegate relation with an omitted descendant
field.

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Reviewing files that changed from the base of the PR and between 1d378fd and caef5a8.

📒 Files selected for processing (2)

• packages/orm/src/client/crud/dialects/base-dialect.ts
• tests/regression/test/issue-2830.test.ts

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