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Fixed #34754 -- Fixed JSONField check constraints validation on NULL values.

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The __isnull lookup of JSONField must special case
Value(None, JSONField()) left-hand-side in order to be coherent with
its convoluted null handling.

Since psycopg>=3 offers no way to pass a NULL::jsonb the issue is
resolved by optimizing IsNull(Value(None), True | False) to
True | False.

Regression in 5c23d9f0c3.

Thanks Alexandre Collet for the report.
This commit is contained in:
Simon Charette
2023-08-02 20:47:49 -04:00
committed by Mariusz Felisiak
parent 2b582387d5
commit 3434dbd39d
4 changed files with 35 additions and 1 deletions
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4
docs/releases/4.2.5.txt
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@@ -9,4 +9,6 @@ Django 4.2.5 fixes several bugs in 4.2.4.
Bugfixes
========
* ...
* Fixed a regression in Django 4.2 that caused an incorrect validation of
``CheckConstraints`` on ``__isnull`` lookups against ``JSONField``
(:ticket:`34754`).