django/docs/releases/4.2.5.txt

==========================
Django 4.2.5 release notes
==========================

*Expected September 4, 2023*

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`).

* Fixed a bug in Django 4.2 where the deprecated ``DEFAULT_FILE_STORAGE`` and
  ``STATICFILES_STORAGE`` settings were not synced with ``STORAGES``
  (:ticket:`34773`).

* Fixed a regression in Django 4.2.2 that caused an unnecessary selection of a
  non-nullable ``ManyToManyField`` without a natural key during serialization
  (:ticket:`34779`).
[4.2.x] Added stub release notes for 4.2.5. Backport of 24068058a63c506c300629fcc491601abc968926 from main 2023-08-01 17:52:36 +00:00			`==========================`
			`Django 4.2.5 release notes`
			`==========================`

			`Expected September 4, 2023`

			`Django 4.2.5 fixes several bugs in 4.2.4.`

			`Bugfixes`
			`========`

[4.2.x] Fixed #34754 -- Fixed JSONField check constraints validation on NULL values. 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 5c23d9f0c32f166c81ecb6f3f01d5077a6084318. Thanks Alexandre Collet for the report. Backport of 3434dbd39d373df7193ad006b970c09c1a909ea3 from main 2023-08-03 00:47:49 +00:00			`* Fixed a regression in Django 4.2 that caused an incorrect validation of`
			``CheckConstraints`` on ``__isnull`` lookups against ``JSONField``
			(:ticket:`34754`).
[4.2.x] Fixed #34773 -- Fixed syncing DEFAULT_FILE_STORAGE/STATICFILES_STORAGE settings with STORAGES. Thanks Petr Dlouhý for the report. Bug in 32940d390a00a30a6409282d314d617667892841. Backport of 6b965c600054f970bdf94017ecf2e0e6e0a4326b from main 2023-08-18 16:11:24 +00:00
			* Fixed a bug in Django 4.2 where the deprecated ``DEFAULT_FILE_STORAGE`` and
			``STATICFILES_STORAGE`` settings were not synced with ``STORAGES``
			(:ticket:`34773`).
[4.2.x] Fixed #34779 -- Avoided unnecessary selection of non-nullable m2m fields without natural keys during serialization. By using `select_related(None)` instead of `select_related()`, the unnecessary joins are completely avoided. Note that the current tests already covers the change, when the field is not `null=True`. Regression in f9936deed1ff13b20e18bd9ca2b0750b52706b6c. Backport of 517d3bb4dd17e9c51690c98d747b86a0ed8b2fbf from main 2023-08-15 19:53:30 +00:00
			`* Fixed a regression in Django 4.2.2 that caused an unnecessary selection of a`
			non-nullable ``ManyToManyField`` without a natural key during serialization
			(:ticket:`34779`).