django.git/tests/constraints/tests.py, branch main

Fixed #37057 -- Adjusted UniqueConstraint handling of UNKNOWN condition.

2026-04-22T21:28:35Z

When we adjusted UNKNOWN handling for CheckConstraint in refs #33996 we assumed that all usage of Q.check would benefit from this approach. However while CHECK constraints enforcement do ignore conditions involving NULL that resolve to UNKNOWN it's not the case for other type of constraints such as UNIQUE ones. Given how UNKNOWN should be treated depends on the callers context it appears that a better strategy for COALESCE wrapping is to force them to apply it if necessary. Thanks Drew Shapiro for the report.

Fixed #36808 -- Required name argument in UniqueConstraint signature.

2025-12-19T14:48:15Z

By trading ValueError for TypeError for omitted name arguments, we gain a little clarity.

Fixed #34871, #36518 -- Implemented unresolved lookups expression replacement.

2025-08-04T07:22:53Z

This allows the proper resolving of lookups when performing constraint validation involving Q and Case objects. Thanks Andrew Roberts for the report and Sarah for the tests and review.

Fixed #36433 -- Fixed constraint validation crash when condition uses a ForeignKey attname.

2025-06-13T06:50:25Z

Regression in e44e8327d3d88d86895735c0e427102063ff5b55. Thank you to Jacob Walls for the report. Co-authored-by: Simon Charette

Fixed #36198 -- Implemented unresolved transform expression replacement.

2025-03-01T18:57:53Z

This allows the proper resolving of F("field__transform") when performing constraint validation. Thanks Tom Hall for the report and Sarah for the test.

Refs #35234 -- Removed CheckConstraint.check per deprecation timeline.

2025-01-15T21:28:37Z

Refs #34355 -- Removed support for positional arguments in BaseConstraint per deprecation timeline.

2025-01-15T21:28:37Z

Fixed #35103 -- Used provided error code and message when fields is set without a condition on UniqueConstraint.

2024-10-10T07:20:37Z

Fixed #35666 -- Documented stacklevel usage and testing, and adjusted test suite accordingly.

2024-08-28T14:44:05Z

Over the years we've had multiple instances of hit and misses when emitting warnings: either setting the wrong stacklevel or not setting it at all. This work adds assertions for the existing warnings that were declaring the correct stacklevel, but were lacking tests for it.

Fixed #35575 -- Added support for constraint validation on GeneratedFields.

2024-08-12T11:45:57Z