django/docs/releases/4.0.txt

============================================
Django 4.0 release notes - UNDER DEVELOPMENT
============================================

*Expected December 2021*

Welcome to Django 4.0!

These release notes cover the :ref:`new features <whats-new-4.0>`, as well as
some :ref:`backwards incompatible changes <backwards-incompatible-4.0>` you'll
want to be aware of when upgrading from Django 3.2 or earlier. We've
:ref:`begun the deprecation process for some features
<deprecated-features-4.0>`.

See the :doc:`/howto/upgrade-version` guide if you're updating an existing
project.

Python compatibility
====================

Django 4.0 supports Python 3.8, 3.9, and 3.10. We **highly recommend** and only
officially support the latest release of each series.

.. _whats-new-4.0:

What's new in Django 4.0
========================

Minor features
--------------

:mod:`django.contrib.admin`
~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.admindocs`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.auth`
~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.contenttypes`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.gis`
~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.messages`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* ...

:mod:`django.contrib.postgres`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* ...

:mod:`django.contrib.redirects`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.sessions`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* ...

:mod:`django.contrib.sitemaps`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.sites`
~~~~~~~~~~~~~~~~~~~~~~~~~~~

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:mod:`django.contrib.staticfiles`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* ...

:mod:`django.contrib.syndication`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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Cache
~~~~~

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CSRF
~~~~

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Decorators
~~~~~~~~~~

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Email
~~~~~

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Error Reporting
~~~~~~~~~~~~~~~

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File Storage
~~~~~~~~~~~~

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File Uploads
~~~~~~~~~~~~

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Forms
~~~~~

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Generic Views
~~~~~~~~~~~~~

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Internationalization
~~~~~~~~~~~~~~~~~~~~

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Logging
~~~~~~~

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Management Commands
~~~~~~~~~~~~~~~~~~~

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Migrations
~~~~~~~~~~

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Models
~~~~~~

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Requests and Responses
~~~~~~~~~~~~~~~~~~~~~~

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Security
~~~~~~~~

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Serialization
~~~~~~~~~~~~~

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Signals
~~~~~~~

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Templates
~~~~~~~~~

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Tests
~~~~~

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URLs
~~~~

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Utilities
~~~~~~~~~

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Validators
~~~~~~~~~~

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.. _backwards-incompatible-4.0:

Backwards incompatible changes in 4.0
=====================================

Database backend API
--------------------

This section describes changes that may be needed in third-party database
backends.

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Miscellaneous
-------------

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.. _deprecated-features-4.0:

Features deprecated in 4.0
==========================

Miscellaneous
-------------

* ...

Features removed in 4.0
=======================

These features have reached the end of their deprecation cycle and are removed
in Django 4.0.

See :ref:`deprecated-features-3.0` for details on these changes, including how
to remove usage of these features.

* ``django.utils.http.urlquote()``, ``urlquote_plus()``, ``urlunquote()``, and
  ``urlunquote_plus()`` are removed.

* ``django.utils.encoding.force_text()`` and ``smart_text()`` are removed.

* ``django.utils.translation.ugettext()``, ``ugettext_lazy()``,
  ``ugettext_noop()``, ``ungettext()``, and ``ungettext_lazy()`` are removed.

* ``django.views.i18n.set_language()`` doesn't set the user language in
  ``request.session`` (key ``_language``).

* ``alias=None`` is required in the signature of
  ``django.db.models.Expression.get_group_by_cols()`` subclasses.

See :ref:`deprecated-features-3.1` for details on these changes, including how
to remove usage of these features.

* ...