Opened 3 years ago

Last modified 3 months ago

#28560 new Bug

distinct() on None values — at Initial Version

Reported by: Mariusz Felisiak Owned by: Mariusz Felisiak
Component: Database layer (models, ORM) Version: master
Severity: Normal Keywords: distinct values
Cc: Triage Stage: Accepted
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


distinct() doesn't work properly on None values. If we select columns with null values then distinct() returns each of them instead of single None, e.g. (based on queries/

>>> list(Item.objects.filter(modified__isnull=True).values_list('modified', flat=True).distinct())
[None, None, None]

instead of [None].

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