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499 lines
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499 lines
15 KiB
Plaintext
============================================
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Django 5.1 release notes - UNDER DEVELOPMENT
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============================================
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*Expected August 2024*
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Welcome to Django 5.1!
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These release notes cover the :ref:`new features <whats-new-5.1>`, as well as
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some :ref:`backwards incompatible changes <backwards-incompatible-5.1>` you'll
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want to be aware of when upgrading from Django 5.0 or earlier. We've
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:ref:`begun the deprecation process for some features
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<deprecated-features-5.1>`.
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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 5.1 supports Python 3.10, 3.11, and 3.12. We **highly recommend** and
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only officially support the latest release of each series.
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.. _whats-new-5.1:
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What's new in Django 5.1
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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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* :attr:`.ModelAdmin.list_display` now supports using ``__`` lookups to list
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fields from related models.
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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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* The default iteration count for the PBKDF2 password hasher is increased from
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720,000 to 870,000.
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* :class:`~django.contrib.auth.forms.BaseUserCreationForm` and
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:class:`~django.contrib.auth.forms.AdminPasswordChangeForm` now support
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disabling password-based authentication by setting an unusable password on
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form save. This is now available in the admin when visiting the user creation
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and password change pages.
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* :func:`~.django.contrib.auth.decorators.login_required`,
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:func:`~.django.contrib.auth.decorators.permission_required`, and
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:func:`~.django.contrib.auth.decorators.user_passes_test` decorators now
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support wrapping asynchronous view functions.
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* ``ReadOnlyPasswordHashWidget`` now includes a button to reset the user's
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password, which replaces the link previously embedded in the
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``ReadOnlyPasswordHashField``'s help text, improving the overall
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accessibility of the
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:class:`~django.contrib.auth.forms.UserChangeForm`.
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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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* :class:`~django.contrib.gis.db.models.functions.BoundingCircle` is now
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supported on SpatiaLite 5.1+.
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* :class:`~django.contrib.gis.db.models.Collect` is now supported on MySQL
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8.0.24+.
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* :class:`~django.contrib.gis.geoip2.GeoIP2` now allows querying using
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:class:`ipaddress.IPv4Address` or :class:`ipaddress.IPv6Address` objects.
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* :meth:`.GeoIP2.country` now exposes the ``continent_code``,
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``continent_name``, and ``is_in_european_union`` values.
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* :meth:`.GeoIP2.city` now exposes the ``accuracy_radius`` and ``region_name``
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values. In addition the ``dma_code`` and ``region`` values are now exposed as
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``metro_code`` and ``region_code``, but the previous keys are also retained
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for backward compatibility.
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* :class:`~django.contrib.gis.measure.Area` now supports the ``ha`` unit.
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* The new :attr:`.OGRGeometry.is_3d` attribute allows checking if a geometry
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has a ``Z`` coordinate dimension.
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* The new :meth:`.OGRGeometry.set_3d` method allows addition and removal of the
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``Z`` coordinate dimension.
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* :class:`~django.contrib.gis.gdal.OGRGeometry`,
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:class:`~django.contrib.gis.gdal.Point`,
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:class:`~django.contrib.gis.gdal.LineString`,
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:class:`~django.contrib.gis.gdal.Polygon`, and
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:class:`~django.contrib.gis.gdal.GeometryCollection` and its subclasses now
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support measured geometries via the new :attr:`.OGRGeometry.is_measured` and
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``m`` properties, and the :meth:`.OGRGeometry.set_measured` method.
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* :attr:`.OGRGeometry.centroid` is now available on all supported geometry
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types.
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* :class:`FromWKB() <django.contrib.gis.db.models.functions.FromWKB>` and
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:class:`FromWKT() <django.contrib.gis.db.models.functions.FromWKT>` functions
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now support the optional ``srid`` argument (except for Oracle where it is
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ignored).
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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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* :class:`~django.contrib.postgres.indexes.BTreeIndex` now supports the
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``deduplicate_items`` parameter.
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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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* :class:`django.contrib.sessions.backends.cached_db.SessionStore` now handles
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exceptions when storing session information in the cache, logging proper
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error messages with their traceback via the newly added
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:ref:`sessions logger <django-contrib-sessions-logger>`.
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* :class:`django.contrib.sessions.backends.base.SessionBase` and all built-in
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session engines now provide async API. The new asynchronous methods all have
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``a`` prefixed names, e.g. ``aget()``, ``akeys()``, or ``acycle_key()``.
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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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Asynchronous views
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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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Database backends
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~~~~~~~~~~~~~~~~~
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* ``"init_command"`` option is now supported in :setting:`OPTIONS` on SQLite
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to allow specifying :ref:`pragma options <sqlite-init-command>` to set upon
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connection.
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* ``"pool"`` option is now supported in :setting:`OPTIONS` on PostgreSQL to
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allow using :ref:`connection pools <postgresql-pool>`.
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Decorators
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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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Error Reporting
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~~~~~~~~~~~~~~~
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* In order to improve accessibility, the technical 404 and 500 error pages now
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use HTML landmark elements for the header, footer, and main content areas.
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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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* In order to improve accessibility and enable screen readers to associate
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fieldsets with their help text, the form fieldset now includes the
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``aria-describedby`` HTML attribute.
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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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Logging
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~~~~~~~
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* ...
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Management Commands
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~~~~~~~~~~~~~~~~~~~
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* :djadmin:`makemigrations` command now displays meaningful symbols for each
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operation to highlight :class:`operation categories
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<django.db.migrations.operations.base.OperationCategory>`.
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Migrations
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~~~~~~~~~~
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* The new ``Operation.category`` attribute allows specifying an
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:class:`operation category
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<django.db.migrations.operations.base.OperationCategory>` used by the
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:djadmin:`makemigrations` to display a meaningful symbol for the operation.
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Models
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~~~~~~
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* :meth:`.QuerySet.explain` now supports the ``generic_plan`` option on
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PostgreSQL 16+.
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* :class:`~django.db.models.expressions.RowRange` now accepts positive integers
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for the ``start`` argument and negative integers for the ``end`` argument.
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* The new ``exclusion`` argument of
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:class:`~django.db.models.expressions.RowRange` and
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:class:`~django.db.models.expressions.ValueRange` allows excluding rows,
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groups, and ties from the window frames.
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* :meth:`.QuerySet.order_by` now supports ordering by annotation transforms
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such as ``JSONObject`` keys and ``ArrayAgg`` indices.
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* :class:`F() <django.db.models.F>` and :class:`OuterRef()
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<django.db.models.OuterRef>` expressions that output
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:class:`~django.db.models.CharField`, :class:`~django.db.models.EmailField`,
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:class:`~django.db.models.SlugField`, :class:`~django.db.models.URLField`,
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:class:`~django.db.models.TextField`, or
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:class:`~django.contrib.postgres.fields.ArrayField` can now be :ref:`sliced
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<slicing-using-f>`.
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* The new ``from_queryset`` argument of :meth:`.Model.refresh_from_db` and
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:meth:`.Model.arefresh_from_db` allows customizing the queryset used to
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reload a model's value. This can be used to lock the row before reloading or
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to select related objects.
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* The new ``"transaction_mode"`` option is now supported in :setting:`OPTIONS`
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on SQLite to allow specifying the :ref:`sqlite-transaction-behavior`.
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Requests and Responses
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~~~~~~~~~~~~~~~~~~~~~~
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* ...
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Security
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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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* Custom tags may now set extra data on the ``Parser`` object that will later
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be made available on the ``Template`` instance. Such data may be used, for
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example, by the template loader, or other template clients.
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* The new :ttag:`{% query_string %} <query_string>` template tag allows
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changing a :class:`~django.http.QueryDict` instance for use in links, for
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example, to generate a link to the next page while keeping any filtering
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options in place.
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* :ref:`Template engines <field-checking>` now implement a ``check()`` method
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that is already registered with the check framework.
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Tests
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~~~~~
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* :meth:`~django.test.SimpleTestCase.assertContains`,
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:meth:`~django.test.SimpleTestCase.assertNotContains`, and
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:meth:`~django.test.SimpleTestCase.assertInHTML` assertions now add haystacks
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to assertion error messages.
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* The :class:`~django.test.RequestFactory`,
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:class:`~django.test.AsyncRequestFactory`, :class:`~django.test.Client`, and
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:class:`~django.test.AsyncClient` classes now support the ``query_params``
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parameter, which accepts a dictionary of query string keys and values. This
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allows setting query strings on any HTTP methods more easily.
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.. code-block:: python
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self.client.post("/items/1", query_params={"action": "delete"})
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await self.async_client.post("/items/1", query_params={"action": "delete"})
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* The new :meth:`.SimpleTestCase.assertNotInHTML` assertion allows testing that
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an HTML fragment is not contained in the given HTML haystack.
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* In order to enforce test isolation, database connections inside threads are
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no longer allowed in :class:`~django.test.SimpleTestCase`.
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URLs
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~~~~
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* ...
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Utilities
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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-5.1:
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Backwards incompatible changes in 5.1
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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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* ...
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:mod:`django.contrib.gis`
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-------------------------
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* Support for PostGIS 2.5 is removed.
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* Support for PROJ < 6 is removed.
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* Support for GDAL 2.4 is removed.
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* :class:`~django.contrib.gis.geoip2.GeoIP2` no longer opens both city and
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country databases when a directory path is provided, preferring the city
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database, if it is available. The country database is a subset of the city
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database and both are not typically needed. If you require use of the country
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database when in the same directory as the city database, explicitly pass the
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country database path to the constructor.
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Dropped support for MariaDB 10.4
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--------------------------------
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Upstream support for MariaDB 10.4 ends in June 2024. Django 5.1 supports
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MariaDB 10.5 and higher.
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Dropped support for PostgreSQL 12
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---------------------------------
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Upstream support for PostgreSQL 12 ends in November 2024. Django 5.1 supports
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PostgreSQL 13 and higher.
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Miscellaneous
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-------------
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* In order to improve accessibility, the admin's changelist filter is now
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rendered in a ``<nav>`` tag instead of a ``<div>``.
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* In order to improve accessibility, the admin's footer is now rendered in
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a ``<footer>`` tag instead of a ``<div>``, and also moved below the
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``<div id="main">`` element.
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* :meth:`.SimpleTestCase.assertURLEqual` and
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:meth:`~django.test.SimpleTestCase.assertInHTML` now add ``": "`` to the
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``msg_prefix``. This is consistent with the behavior of other assertions.
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* ``django.utils.text.Truncator`` used by :tfilter:`truncatechars_html` and
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:tfilter:`truncatewords_html` template filters now uses
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:py:class:`html.parser.HTMLParser` subclasses. This results in a more robust
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and faster operation, but there may be small differences in the output.
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* The undocumented ``django.urls.converters.get_converter()`` function is
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removed.
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.. _deprecated-features-5.1:
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Features deprecated in 5.1
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==========================
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Miscellaneous
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-------------
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* The ``ModelAdmin.log_deletion()`` and ``LogEntryManager.log_action()``
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methods are deprecated. Subclasses should implement
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``ModelAdmin.log_deletions()`` and ``LogEntryManager.log_actions()``
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instead.
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* The undocumented ``django.utils.itercompat.is_iterable()`` function and the
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``django.utils.itercompat`` module are deprecated. Use
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``isinstance(..., collections.abc.Iterable)`` instead.
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* The ``django.contrib.gis.geoip2.GeoIP2.coords()`` method is deprecated. Use
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``django.contrib.gis.geoip2.GeoIP2.lon_lat()`` instead.
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* The ``django.contrib.gis.geoip2.GeoIP2.open()`` method is deprecated. Use the
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:class:`~django.contrib.gis.geoip2.GeoIP2` constructor instead.
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* Passing positional arguments to :meth:`.Model.save` and :meth:`.Model.asave`
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is deprecated in favor of keyword-only arguments.
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* Setting ``django.contrib.gis.gdal.OGRGeometry.coord_dim`` is deprecated. Use
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:meth:`~django.contrib.gis.gdal.OGRGeometry.set_3d` instead.
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* Overriding existing converters with ``django.urls.register_converter()`` is
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deprecated.
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* The ``check`` keyword argument of ``CheckConstraint`` is deprecated in favor
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of ``condition``.
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Features removed in 5.1
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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 5.1.
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See :ref:`deprecated-features-4.2` for details on these changes, including how
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to remove usage of these features.
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* The ``BaseUserManager.make_random_password()`` method is removed.
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* The model's ``Meta.index_together`` option is removed.
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* The ``length_is`` template filter is removed.
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* The ``django.contrib.auth.hashers.SHA1PasswordHasher``,
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``django.contrib.auth.hashers.UnsaltedSHA1PasswordHasher``, and
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``django.contrib.auth.hashers.UnsaltedMD5PasswordHasher`` are removed.
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* The model ``django.contrib.postgres.fields.CICharField``,
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``django.contrib.postgres.fields.CIEmailField``, and
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``django.contrib.postgres.fields.CITextField`` are removed, except for
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support in historical migrations.
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* The ``django.contrib.postgres.fields.CIText`` mixin is removed.
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* The ``map_width`` and ``map_height`` attributes of ``BaseGeometryWidget`` are
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removed.
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* The ``SimpleTestCase.assertFormsetError()`` method is removed.
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* The ``TransactionTestCase.assertQuerysetEqual()`` method is removed.
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* Support for passing encoded JSON string literals to ``JSONField`` and
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associated lookups and expressions is removed.
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* Support for passing positional arguments to ``Signer`` and
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``TimestampSigner`` is removed.
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* The ``DEFAULT_FILE_STORAGE`` and ``STATICFILES_STORAGE`` settings is removed.
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* The ``django.core.files.storage.get_storage_class()`` function is removed.
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