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django/docs/releases/4.1.txt

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============================================
Django 4.1 release notes - UNDER DEVELOPMENT
============================================
*Expected August 2022*
Welcome to Django 4.1!
These release notes cover the :ref:`new features <whats-new-4.1>`, as well as
some :ref:`backwards incompatible changes <backwards-incompatible-4.1>` you'll
want to be aware of when upgrading from Django 4.0 or earlier. We've
:ref:`begun the deprecation process for some features
<deprecated-features-4.1>`.
See the :doc:`/howto/upgrade-version` guide if you're updating an existing
project.
Python compatibility
====================
Django 4.1 supports Python 3.8, 3.9, and 3.10. We **highly recommend** and only
officially support the latest release of each series.
.. _whats-new-4.1:
What's new in Django 4.1
========================
Minor features
--------------
:mod:`django.contrib.admin`
~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.admindocs`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.auth`
~~~~~~~~~~~~~~~~~~~~~~~~~~
* The default iteration count for the PBKDF2 password hasher is increased from
320,000 to 390,000.
:mod:`django.contrib.contenttypes`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.gis`
~~~~~~~~~~~~~~~~~~~~~~~~~
* The new :meth:`.GEOSGeometry.make_valid()` method allows converting invalid
geometries to valid ones.
:mod:`django.contrib.messages`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.postgres`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* The new :class:`BitXor() <django.contrib.postgres.aggregates.BitXor>`
aggregate function returns an ``int`` of the bitwise ``XOR`` of all non-null
input values.
* :class:`~django.contrib.postgres.indexes.SpGistIndex` now supports covering
indexes on PostgreSQL 14+.
* :class:`~django.contrib.postgres.constraints.ExclusionConstraint` now
supports covering exclusion constraints using SP-GiST indexes on PostgreSQL
14+.
:mod:`django.contrib.redirects`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.sessions`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.sitemaps`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.sites`
~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.staticfiles`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.syndication`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
Cache
~~~~~
* ...
CSRF
~~~~
* ...
Decorators
~~~~~~~~~~
* ...
Email
~~~~~
* ...
Error Reporting
~~~~~~~~~~~~~~~
* ...
File Storage
~~~~~~~~~~~~
* ...
File Uploads
~~~~~~~~~~~~
* ...
Forms
~~~~~
* ...
Generic Views
~~~~~~~~~~~~~
* ...
Internationalization
~~~~~~~~~~~~~~~~~~~~
* ...
Logging
~~~~~~~
* ...
Management Commands
~~~~~~~~~~~~~~~~~~~
* ...
Migrations
~~~~~~~~~~
* ...
Models
~~~~~~
* ...
Requests and Responses
~~~~~~~~~~~~~~~~~~~~~~
* ...
Security
~~~~~~~~
* ...
Serialization
~~~~~~~~~~~~~
* ...
Signals
~~~~~~~
* ...
Templates
~~~~~~~~~
* ...
Tests
~~~~~
* ...
URLs
~~~~
* ...
Utilities
~~~~~~~~~
* ...
Validators
~~~~~~~~~~
* ...
.. _backwards-incompatible-4.1:
Backwards incompatible changes in 4.1
=====================================
Database backend API
--------------------
This section describes changes that may be needed in third-party database
backends.
* ...
Dropped support for MariaDB 10.2
--------------------------------
Upstream support for MariaDB 10.2 ends in May 2022. Django 4.1 supports MariaDB
10.3 and higher.
Miscellaneous
-------------
* ...
.. _deprecated-features-4.1:
Features deprecated in 4.1
==========================
Miscellaneous
-------------
* ...
Features removed in 4.1
=======================
These features have reached the end of their deprecation cycle and are removed
in Django 4.1.
See :ref:`deprecated-features-3.2` for details on these changes, including how
to remove usage of these features.
* Support for assigning objects which don't support creating deep copies with
``copy.deepcopy()`` to class attributes in ``TestCase.setUpTestData()`` is
removed.
* Support for using a boolean value in
:attr:`.BaseCommand.requires_system_checks` is removed.
* The ``whitelist`` argument and ``domain_whitelist`` attribute of
``django.core.validators.EmailValidator`` are removed.
* The ``default_app_config`` application configuration variable is removed.
* ``TransactionTestCase.assertQuerysetEqual()`` no longer calls ``repr()`` on a
queryset when compared to string values.
* The ``django.core.cache.backends.memcached.MemcachedCache`` backend is
removed.
* Support for the pre-Django 3.2 format of messages used by
``django.contrib.messages.storage.cookie.CookieStorage`` is removed.