Opened 5 years ago

Last modified 5 years ago

#32703 closed Bug

Deferred UniqueConstraints should not be validated in validate_unique() — at Initial Version

Reported by: Manuel Baclet Owned by: nobody
Component: Database layer (models, ORM) Version: 3.1
Severity: Normal Keywords: UniqueConstraint deferrable
Cc: Manuel Baclet Triage Stage: Unreviewed
Has patch: no Needs documentation: yes
Needs tests: no Patch needs improvement: no
Easy pickings: yes UI/UX: no

Description

When using a deferred UniqueConstraint, we are expecting validation not to occur before transaction commit.
Considering a model with a field unique_valued_field with a deferred UniqueConstraint and two models m1 and m2, we should be able to do:

with transaction.atomic():
    saved_value = m1.unique_valued_field
    m1.unique_valued_field = m2.unique_valued_field
    m2.unique_valued_field = saved_value
    m1.save()
    m2.save()

Currently, this raises a ValidationError.

Change History (0)

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