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==========================
Django 4.1.2 release notes
==========================

*October 4, 2022*

Django 4.1.2 fixes a security issue with severity "medium" and several bugs in
4.1.1.

CVE-2022-41323: Potential denial-of-service vulnerability in internationalized URLs
===================================================================================

Internationalized URLs were subject to potential denial of service attack via
the locale parameter.

Bugfixes
========

* Fixed a regression in Django 4.1 that caused a migration crash on PostgreSQL
  when adding a model with ``ExclusionConstraint`` (:ticket:`33982`).

* Fixed a regression in Django 4.1 that caused aggregation over a queryset that
  contained an ``Exists`` annotation to crash due to too many selected columns
  (:ticket:`33992`).

* Fixed a bug in Django 4.1 that caused an incorrect validation of
  ``CheckConstraint`` on ``NULL`` values (:ticket:`33996`).

* Fixed a regression in Django 4.1 that caused a
  ``QuerySet.values()/values_list()`` crash on ``ArrayAgg()`` and
  ``JSONBAgg()`` (:ticket:`34016`).

* Fixed a bug in Django 4.1 that caused :attr:`.ModelAdmin.autocomplete_fields`
  to be incorrectly selected after adding/changing related instances via popups
  (:ticket:`34025`).

* Fixed a regression in Django 4.1 where the app registry was not populated
  when running parallel tests with the ``multiprocessing`` start method
  ``spawn`` (:ticket:`34010`).

* Fixed a regression in Django 4.1 where the ``--debug-mode`` argument to
  ``test`` did not work when running parallel tests with the
  ``multiprocessing`` start method ``spawn`` (:ticket:`34010`).

* Fixed a regression in Django 4.1 that didn't alter a sequence type when
  altering type of pre-Django 4.1 serial columns on PostgreSQL
  (:ticket:`34058`).

* Fixed a regression in Django 4.1 that caused a crash for :class:`View`
  subclasses with asynchronous handlers when handling non-allowed HTTP methods
  (:ticket:`34062`).

* Reverted caching related managers for ``ForeignKey``, ``ManyToManyField``,
  and ``GenericRelation`` that caused the incorrect refreshing of related
  objects (:ticket:`33984`).

* Relaxed the system check added in Django 4.1 for the same name used for
  multiple template tag modules to a warning (:ticket:`32987`).