django.git/tests/invalid_models_tests, branch main

Fixed #36973 -- Made fields.E348 check detect further clashes between managers and related_names.

2026-04-02T19:54:23Z

Clashes were only detected for self-referential relationships, i.e. ForeignKey("self"). Refs #22977. Bug in 6888375c53476011754f778deabc6cdbfa327011. Thanks JaeHyuckSa for the thorough review!

Refs #24920 -- Made DecimalField system checks database dependent.

2025-12-28T18:21:49Z

Thanks Tim Graham for the suggestion.

Fixed #36806 -- Added system check for null kwarg in GeneratedField.

2025-12-22T14:41:41Z

The null argument has no effect on GeneratedField since the nullability of the column depends on the database and expression used.

Fixed #36594 -- Improved UniqueConstraint's nulls_distinct system check message.

2025-12-16T20:06:10Z

Clarified that the nulls_distinct argument is not supported, as opposed to certain values for the argument. Thanks Russell Owen for the report.

Refs #21961 -- Added DatabaseFeatures.supports_on_delete_db_(cascade/null) feature flags.

2025-11-23T10:53:24Z

Needed on MongoDB. Co-Authored-By: Mariusz Felisiak

Fixed #26609 -- Extended fields.E004 system check for unordered iterables.

2025-11-19T07:22:44Z

Co-authored-by: Karl Wooster

Fixed #24920 -- Added support for DecimalField with no precision.

2025-11-17T12:43:47Z

Thanks Lily for the review.

Fixed #21961 -- Added support for database-level delete options for ForeignKey.

2025-10-18T13:03:50Z

Thanks Simon Charette for pair programming. Co-authored-by: Nick Stefan Co-authored-by: Akash Kumar Sen <71623442+Akash-Kumar-Sen@users.noreply.github.com> Co-authored-by: Simon Charette

Fixed #36611, Refs #36580 -- Added system check for multicolumn ForeignObject in Meta.indexes/constraints/unique_together.

2025-10-13T17:53:39Z

ForeignObjects with multiple `from_fields` are not supported in these options. Co-authored-by: Jacob Walls Co-authored-by: Natalia <124304+nessita@users.noreply.github.com>

Fixed #36660 -- Fixed a regression in descending Index local field checks.

2025-10-13T13:42:23Z

Regression in 8638d8bf74c1a58302c97d4436ad2eb08438145b. Refs #36273. Thanks Federico Bond for the report.