2018-12-28 08:03:30 +08:00
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============================================
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Django 3.0 release notes - UNDER DEVELOPMENT
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============================================
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*Expected December 2019*
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Welcome to Django 3.0!
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These release notes cover the :ref:`new features <whats-new-3.0>`, as well as
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some :ref:`backwards incompatible changes <backwards-incompatible-3.0>` you'll
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want to be aware of when upgrading from Django 2.2 or earlier. We've
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:ref:`dropped some features<removed-features-3.0>` that have reached the end of
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their deprecation cycle, and we've :ref:`begun the deprecation process for
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some features <deprecated-features-3.0>`.
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See the :doc:`/howto/upgrade-version` guide if you're updating an existing
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project.
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Python compatibility
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====================
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Django 3.0 supports Python 3.6, 3.7, and 3.8. We **highly recommend** and only
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officially support the latest release of each series.
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The Django 2.2.x series is the last to support Python 3.5.
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Third-party library support for older version of Django
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=======================================================
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Following the release of Django 3.0, we suggest that third-party app authors
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drop support for all versions of Django prior to 2.2. At that time, you should
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be able to run your package's tests using ``python -Wd`` so that deprecation
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warnings appear. After making the deprecation warning fixes, your app should be
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compatible with Django 3.0.
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.. _whats-new-3.0:
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What's new in Django 3.0
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========================
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Minor features
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--------------
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:mod:`django.contrib.admin`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.admindocs`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.auth`
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.contenttypes`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.gis`
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~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.messages`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.postgres`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.redirects`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.sessions`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.sitemaps`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.sites`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.staticfiles`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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:mod:`django.contrib.syndication`
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* ...
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Cache
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~~~~~
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* ...
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CSRF
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~~~~
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* ...
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Email
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~~~~~
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* ...
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File Storage
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~~~~~~~~~~~~
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* ...
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File Uploads
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~~~~~~~~~~~~
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* ...
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Forms
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~~~~~
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* ...
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Generic Views
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~~~~~~~~~~~~~
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* ...
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Internationalization
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~~~~~~~~~~~~~~~~~~~~
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* ...
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Management Commands
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~~~~~~~~~~~~~~~~~~~
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2019-01-28 03:35:17 +08:00
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* The new :option:`compilemessages --ignore` option allows ignoring specific
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directories when searching for ``.po`` files to compile.
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2018-12-28 08:03:30 +08:00
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Migrations
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~~~~~~~~~~
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* ...
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Models
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* ...
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Requests and Responses
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~~~~~~~~~~~~~~~~~~~~~~
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* ...
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Serialization
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~~~~~~~~~~~~~
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* ...
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Signals
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~~~~~~~
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* ...
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Templates
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~~~~~~~~~
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* ...
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Tests
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~~~~~
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* ...
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URLs
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~~~~
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* ...
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Validators
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~~~~~~~~~~
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* ...
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.. _backwards-incompatible-3.0:
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Backwards incompatible changes in 3.0
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=====================================
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Database backend API
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--------------------
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This section describes changes that may be needed in third-party database
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backends.
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2019-01-19 22:00:24 +08:00
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* The second argument of ``DatabaseIntrospection.get_geometry_type()`` is now
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the row description instead of the column name.
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2018-12-28 08:03:30 +08:00
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2019-01-19 21:35:51 +08:00
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* ``DatabaseIntrospection.get_field_type()`` may no longer return tuples.
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2019-01-19 12:17:26 +08:00
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* If the database can create foreign keys in the same SQL statement that adds a
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field, add ``SchemaEditor.sql_create_column_inline_fk`` with the appropriate
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SQL; otherwise, set ``DatabaseFeatures.can_create_inline_fk = False``.
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2019-01-31 04:31:56 +08:00
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* ``DatabaseFeatures.can_return_id_from_insert`` and
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``can_return_ids_from_bulk_insert`` are renamed to
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``can_return_columns_from_insert`` and ``can_return_rows_from_bulk_insert``.
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2019-02-05 01:03:12 +08:00
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:mod:`django.contrib.gis`
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-------------------------
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2019-02-05 00:07:46 +08:00
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* Supported for PostGIS 2.1 is removed.
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2019-02-05 01:03:12 +08:00
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* Support for SpatiaLite 4.1 and 4.2 is removed.
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2019-02-05 00:07:46 +08:00
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Dropped support for PostgreSQL 9.4
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----------------------------------
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Upstream support for PostgreSQL 9.4 ends in December 2019. Django 3.0 supports
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PostgreSQL 9.5 and higher.
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2019-02-05 03:00:00 +08:00
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Removed private Python 2 compatibility APIs
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-------------------------------------------
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While Python 2 support was removed in Django 2.0, some private APIs weren't
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removed from Django so that third party apps could continue using them until
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the Python 2 end-of-life.
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Since we expect apps to drop Python 2 compatibility when adding support for
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Django 3.0, we're removing these APIs at this time.
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* ``django.test.utils.str_prefix()`` - Strings don't have 'u' prefixes in
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Python 3.
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* ``django.test.utils.patch_logger()`` - Use
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:meth:`unittest.TestCase.assertLogs` instead.
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2019-02-05 08:40:07 +08:00
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* ``django.utils.lru_cache.lru_cache()`` - Alias of
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:func:`functools.lru_cache`.
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2019-02-05 08:44:54 +08:00
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* ``django.utils.decorators.available_attrs()`` - This function returns
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``functools.WRAPPER_ASSIGNMENTS``.
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2019-02-05 08:50:30 +08:00
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* ``django.utils._os.abspathu()`` - Alias of :func:`os.path.abspath`.
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* ``django.utils._os.upath()`` and ``npath()`` - These functions do nothing on
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Python 3.
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2019-02-05 08:53:27 +08:00
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* ``django.utils.six`` - Remove usage of this vendored library or switch to
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`six <https://pypi.org/project/six/>`_.
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* ``django.utils.encoding.python_2_unicode_compatible()`` - Alias of
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``six.python_2_unicode_compatible()``.
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2018-12-28 08:03:30 +08:00
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Miscellaneous
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-------------
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* ...
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.. _deprecated-features-3.0:
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Features deprecated in 3.0
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==========================
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Miscellaneous
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-------------
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2019-02-05 07:53:11 +08:00
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* ``django.utils.http.urlquote()``, ``urlquote_plus()``, ``urlunquote()``, and
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``urlunquote_plus()`` are deprecated in favor of the functions that they're
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aliases for: :func:`urllib.parse.quote`, :func:`~urllib.parse.quote_plus`,
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:func:`~urllib.parse.unquote`, and :func:`~urllib.parse.unquote_plus`.
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2018-12-28 08:03:30 +08:00
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.. _removed-features-3.0:
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Features removed in 3.0
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=======================
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These features have reached the end of their deprecation cycle and are removed
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in Django 3.0.
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See :ref:`deprecated-features-2.0` for details on these changes, including how
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to remove usage of these features.
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2018-12-28 08:23:09 +08:00
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* The ``django.db.backends.postgresql_psycopg2`` module is removed.
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2018-12-28 08:03:30 +08:00
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2018-12-28 08:23:09 +08:00
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* ``django.shortcuts.render_to_response()`` is removed.
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2018-12-28 08:49:03 +08:00
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* The ``DEFAULT_CONTENT_TYPE`` setting is removed.
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2018-12-28 08:58:22 +08:00
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* ``HttpRequest.xreadlines()`` is removed.
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2018-12-28 08:58:22 +08:00
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* Support for the ``context`` argument of ``Field.from_db_value()`` and
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``Expression.convert_value()`` is removed.
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2018-12-28 09:18:45 +08:00
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* The ``field_name`` keyword argument of ``QuerySet.earliest()` and
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``latest()`` is removed.
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2018-12-28 08:03:30 +08:00
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See :ref:`deprecated-features-2.1` for details on these changes, including how
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to remove usage of these features.
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2018-12-28 09:31:55 +08:00
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* The ``ForceRHR`` GIS function is removed.
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2018-12-28 09:35:20 +08:00
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* ``django.utils.http.cookie_date()`` is removed.
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2018-12-28 09:41:54 +08:00
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* The ``staticfiles`` and ``admin_static`` template tag libraries are removed.
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* ``django.contrib.staticfiles.templatetags.staticfiles.static()`` is removed.
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