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django/docs/releases/3.2.txt

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============================================
Django 3.2 release notes - UNDER DEVELOPMENT
============================================
*Expected April 2021*
Welcome to Django 3.2!
These release notes cover the :ref:`new features <whats-new-3.2>`, as well as
some :ref:`backwards incompatible changes <backwards-incompatible-3.2>` you'll
want to be aware of when upgrading from Django 3.1 or earlier. We've
:ref:`begun the deprecation process for some features
<deprecated-features-3.2>`.
See the :doc:`/howto/upgrade-version` guide if you're updating an existing
project.
Django 3.2 is designated as a :term:`long-term support release
<Long-term support release>`. It will receive security updates for at least
three years after its release. Support for the previous LTS, Django 2.2, will
end in April 2022.
Python compatibility
====================
Django 3.2 supports Python 3.6, 3.7, and 3.8. We **highly recommend** and only
officially support the latest release of each series.
.. _whats-new-3.2:
What's new in Django 3.2
========================
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
216,000 to 260,000.
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:mod:`django.contrib.contenttypes`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.gis`
~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
:mod:`django.contrib.messages`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* The :class:`~django.contrib.postgres.operations.CreateExtension` operation
now checks that the extension already exists in the database and skips the
migration if so.
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:mod:`django.contrib.postgres`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* ...
: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
~~~~
* ...
Email
~~~~~
* ...
Error Reporting
~~~~~~~~~~~~~~~
* ...
File Storage
~~~~~~~~~~~~
* ...
File Uploads
~~~~~~~~~~~~
* ...
Forms
~~~~~
* ...
Generic Views
~~~~~~~~~~~~~
* ...
Internationalization
~~~~~~~~~~~~~~~~~~~~
* ...
Logging
~~~~~~~
* ...
Management Commands
~~~~~~~~~~~~~~~~~~~
* :djadmin:`loaddata` now supports fixtures stored in XZ archives (``.xz``) and
LZMA archives (``.lzma``).
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* :djadmin:`makemigrations` can now be called without an active database
connection. In that case, check for a consistent migration history is
skipped.
* :attr:`.BaseCommand.requires_system_checks` now supports specifying a list of
tags. System checks registered in the chosen tags will be checked for errors
prior to executing the command. In previous versions, either all or none
of the system checks were performed.
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Migrations
~~~~~~~~~~
* The new ``Operation.migration_name_fragment`` property allows providing a
filename fragment that will be used to name a migration containing only that
operation.
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Models
~~~~~~
* The new ``no_key`` parameter for :meth:`.QuerySet.select_for_update()`,
supported on PostgreSQL, allows acquiring weaker locks that don't block the
creation of rows that reference locked rows through a foreign key.
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* :class:`When() <django.db.models.expressions.When>` expression now allows
using the ``condition`` argument with ``lookups``.
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Requests and Responses
~~~~~~~~~~~~~~~~~~~~~~
* ...
Security
~~~~~~~~
* ...
Serialization
~~~~~~~~~~~~~
* ...
Signals
~~~~~~~
* ...
Templates
~~~~~~~~~
* ...
Tests
~~~~~
* Objects assigned to class attributes in :meth:`.TestCase.setUpTestData` are
now isolated for each test method. Such objects are now required to support
creating deep copies with :py:func:`copy.deepcopy`. Assigning objects which
don't support ``deepcopy()`` is deprecated and will be removed in Django 4.1.
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* :class:`~django.test.Client` now preserves the request query string when
following 307 and 308 redirects.
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URLs
~~~~
* ...
Utilities
~~~~~~~~~
* ...
Validators
~~~~~~~~~~
* ...
.. _backwards-incompatible-3.2:
Backwards incompatible changes in 3.2
=====================================
Database backend API
--------------------
This section describes changes that may be needed in third-party database
backends.
* ...
:mod:`django.contrib.gis`
-------------------------
* Support for PostGIS 2.2 is removed.
Dropped support for PostgreSQL 9.5
----------------------------------
Upstream support for PostgreSQL 9.5 ends in February 2021. Django 3.2 supports
PostgreSQL 9.6 and higher.
Dropped support for MySQL 5.6
-----------------------------
The end of upstream support for MySQL 5.6 is April 2021. Django 3.2 supports
MySQL 5.7 and higher.
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Miscellaneous
-------------
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* The undocumented ``SpatiaLiteOperations.proj4_version()`` method is renamed
to ``proj_version()``.
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* Minified JavaScript files are no longer included with the admin. If you
require these files to be minified, consider using a third party app or
external build tool. The minified vendored JavaScript files packaged with the
admin (e.g. :ref:`jquery.min.js <contrib-admin-jquery>`) are still included.
* :attr:`.ModelAdmin.prepopulated_fields` no longer strips English stop words,
such as ``'a'`` or ``'an'``.
* :func:`~django.utils.text.slugify` now removes leading and trailing dashes
and underscores.
* The :tfilter:`intcomma` and :tfilter:`intword` template filters no longer
depend on the :setting:`USE_L10N` setting.
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.. _deprecated-features-3.2:
Features deprecated in 3.2
==========================
Miscellaneous
-------------
* Assigning objects which don't support creating deep copies with
:py:func:`copy.deepcopy` to class attributes in
:meth:`.TestCase.setUpTestData` is deprecated.
* Using a boolean value in :attr:`.BaseCommand.requires_system_checks` is
deprecated. Use ``'__all__'`` instead of ``True``, and ``[]`` (an empty list)
instead of ``False``.