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fix(policy): handle computed fields in relation, delegate-inherited and before() policy paths - #2910
#2889 inlined @computed fields when they're referenced directly on the policy's own model, but other policy paths still emitted bare column references and failed with "no such column":
Case
Before
Relation member access: @@allow('read', owner.isActive)
no such column: $$t1.isActive
Computed field inherited from a @@delegate base, used in a sub-model policy
evaluated against the sub-model table → no such column: Video.visibility
before().canEdit in a post-update policy
before-update load selected Model.canEdit as a column
Parameterized computed field in a policy
plain Error
Changes
expression-transformer.ts: every field reference in a policy expression now goes through one buildFieldRef helper, which handles regular columns, computed fields (via dialect.fieldRef), and delegate-inherited fields. The base-table subquery for inherited fields uses the same helper, so an inherited computed field is evaluated against the base table. Parameterized computed fields raise an ORMError (config-error).
policy-handler.ts: the before-update entity load inlines computed fields instead of selecting them as columns.
Tests
tests/regression/test/issue-2888.test.ts now also covers:
the computed expression bound to the row's own column, including a denied update
relation member access
a delegate-inherited computed field
before() on a computed field, both a regular one and a delegate-inherited one
a create policy
the parameterized-field error
All pass on SQLite, PostgreSQL and MySQL. The policy e2e suite on SQLite also passes (300 passed, 21 skipped).
Not covered
On MySQL, ON DUPLICATE KEY UPDATE strips Model. table prefixes from the update filter, including inside an inlined computed subquery. Not tested here.
Policy checks now evaluate computed fields when authorizing create and update operations, including fields accessed through relations or inherited from base models.
Post-update before() checks now evaluate computed field values correctly.
Using parameterized computed fields in policy expressions now returns a configuration error that identifies the field.
Structured ORM errors are preserved during read and existence checks instead of being converted into database query errors.
…nd before() policy paths
Follow-up to #2889, which only inlined computed fields referenced directly on
the policy's own model. Other paths still emitted bare column refs:
- relation member access (`owner.isActive`) selected `"$$t1"."isActive"`
- computed fields inherited from a `@@delegate` base were evaluated against the
sub-model table (`"Video"."visibility"`) instead of the base table
- `before().<computed>` in post-update policies loaded the field as a column
All field references in the expression transformer now go through a single
`buildFieldRef` helper that handles regular, computed and delegate-inherited
fields, and the before-update entity load inlines computed fields. Using a
parameterized computed field in a policy now raises an ORMError (config-error).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0118JMseP4tLbCCwFQRQS4od
No actionable comments were generated in the recent review.
Walkthrough
Policy expressions now resolve computed fields, including relation and delegate-inherited fields. Before-update policy loading selects computed expressions instead of physical-column references. Parameterized computed fields produce configuration errors, and CRUD operations preserve ORM errors.
Changes: Computed fields in policies
Layer / File(s)
Summary
Resolve computed fields in policy expressions packages/plugins/policy/src/expression-transformer.ts, packages/plugins/policy/src/utils.ts, tests/regression/test/issue-2888.test.ts
ExpressionTransformer resolves ordinary, computed, and inherited fields through buildFieldRef. Parameterized computed fields raise an ORMError with reason CONFIG_ERROR. Tests cover update, create, relation, delegate-inheritance, and parameterized-field cases.
Select computed fields for before-update policies packages/plugins/policy/src/policy-handler.ts, tests/regression/test/issue-2888.test.ts
loadBeforeUpdateEntities selects dialect-generated computed expressions and aliases them to field names. Tests cover before() policy checks, including inherited computed fields.
Preserve ORM errors in CRUD operations packages/orm/src/client/crud/operations/base.ts
existsNonUnique and read rethrow caught ORMError instances unchanged. Other errors continue to be wrapped as database query errors.
zenstackhq/zenstack#2889: That pull request inlines computed fields in same-model policies; this pull request extends resolution to relation access, delegate-inherited fields, and before-update policies.
Suggested reviewers:krist7599555, evgenovalov
Merge Risk: Low · up to 040fb
The before-update policy fix is in place. A narrow MySQL upsert policy limitation remains; merging is reasonable with owner awareness of that case.
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packages/orm/src/client/crud/operations/base.ts
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packages/plugins/policy/src/policy-handler.ts
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Actionable comments posted: 3
Fix comments: Fix CodeRabbit comments on this PR
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Review comments at @packages/plugins/policy/src/expression-transformer.ts:
- Line 987: Update buildFieldRef in the expression transformation path to strip
table qualifiers only when they refer to the mutation model at the current query
scope. Preserve nested query aliases, including aliases matching the mutation
model name, and retain correlated outer references so duplicate-key policy
filters remain unambiguous.
- Around line 1137-1141: Preserve the CONFIG_ERROR raised for parameterized
computed fields when the read handler processes findMany, rather than wrapping
it as DB_QUERY_ERROR. Update the read error-handling path and add a regression
test asserting the surfaced error reason is CONFIG_ERROR.
Review comments at @packages/plugins/policy/src/policy-handler.ts:
- Around line 739-743: Move the parameterized-field validation in the
computed-field handling path before `SelectionNode.create` inlines the field
expression. Ensure `before()` policies reject parameterized computed fields with
`CONFIG_ERROR` before their implementation can be invoked without arguments.
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…serve ORM errors in reads
- check for parameterized computed fields when loading before-update entities,
so `before().field` can't evaluate the implementation without args
- don't re-wrap ORMErrors (e.g. CONFIG_ERROR from plugins) as DB_QUERY_ERROR
in read/exists operation paths
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0118JMseP4tLbCCwFQRQS4od
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Follow-up to #2889 (issue #2888).
#2889 inlined
@computedfields when they're referenced directly on the policy's own model, but other policy paths still emitted bare column references and failed with "no such column":@@allow('read', owner.isActive)no such column: $$t1.isActive@@delegatebase, used in a sub-model policyno such column: Video.visibilitybefore().canEditin a post-update policyModel.canEditas a columnErrorChanges
expression-transformer.ts: every field reference in a policy expression now goes through onebuildFieldRefhelper, which handles regular columns, computed fields (viadialect.fieldRef), and delegate-inherited fields. The base-table subquery for inherited fields uses the same helper, so an inherited computed field is evaluated against the base table. Parameterized computed fields raise anORMError(config-error).policy-handler.ts: the before-update entity load inlines computed fields instead of selecting them as columns.Tests
tests/regression/test/issue-2888.test.tsnow also covers:before()on a computed field, both a regular one and a delegate-inherited oneAll pass on SQLite, PostgreSQL and MySQL. The policy e2e suite on SQLite also passes (300 passed, 21 skipped).
Not covered
ON DUPLICATE KEY UPDATEstripsModel.table prefixes from the update filter, including inside an inlined computed subquery. Not tested here.🤖 Generated with Claude Code
https://claude.ai/code/session_0118JMseP4tLbCCwFQRQS4od
Summary by CodeRabbit
before()checks now evaluate computed field values correctly.