[pull] main from django:main#378
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pull[bot] merged 3 commits intothreatcode:mainfrom Apr 23, 2026
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Added new constant django.db.models.fields.BLANK_CHOICE_LABEL for an accessible and translatable blank choice label in forms. Deprecated django.db.models.fields.BLANK_CHOICE_DASH constant. Added the immediately deprecated transitional setting USE_BLANK_CHOICE_DASH. Co-Authored-By: Marijke Luttekes <mail@marijkeluttekes.dev>
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.
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