381 lines
11 KiB
Plaintext
381 lines
11 KiB
Plaintext
============================================
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Django 1.9 release notes - UNDER DEVELOPMENT
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============================================
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Welcome to Django 1.9!
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These release notes cover the `new features`_, as well as some `backwards
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incompatible changes`_ you'll want to be aware of when upgrading from Django
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1.8 or older versions. We've :ref:`dropped some features
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<deprecation-removed-in-1.9>` that have reached the end of their deprecation
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cycle, and we've `begun the deprecation process for some features`_.
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.. _`new features`: `What's new in Django 1.9`_
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.. _`backwards incompatible changes`: `Backwards incompatible changes in 1.9`_
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.. _`dropped some features`: `Features removed in 1.9`_
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.. _`begun the deprecation process for some features`: `Features deprecated in 1.9`_
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Python compatibility
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====================
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Like Django 1.8, Django 1.9 requires Python 2.7 or above, though we
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**highly recommend** the latest minor release. We've dropped support for
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Python 3.2 and added support for Python 3.5.
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What's new in Django 1.9
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========================
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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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* Admin views now have ``model_admin`` or ``admin_site`` attributes.
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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 has been increased
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by 20%. This backwards compatible change will not affect users who have
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subclassed ``django.contrib.auth.hashers.PBKDF2PasswordHasher`` to change the
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default value.
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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.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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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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* Class based views generated using ``as_view()`` now have ``view_class``
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and ``view_initkwargs`` attributes.
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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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* ...
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Models
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^^^^^^
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* Added the :meth:`RelatedManager.set()
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<django.db.models.fields.related.RelatedManager.set()>` method to the related
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managers created by ``ForeignKey``, ``GenericForeignKey``, and
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``ManyToManyField``.
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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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* Template tags created with the :meth:`~django.template.Library.simple_tag`
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helper can now store results in a template variable by using the ``as``
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argument.
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Requests and Responses
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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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Validators
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^^^^^^^^^^
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* ...
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Backwards incompatible changes in 1.9
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=====================================
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.. warning::
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In addition to the changes outlined in this section, be sure to review the
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:doc:`deprecation timeline </internals/deprecation>` for any features that
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have been removed. If you haven't updated your code within the
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deprecation timeline for a given feature, its removal may appear as a
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backwards incompatible change.
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Database backend API
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~~~~~~~~~~~~~~~~~~~~
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* A couple of new tests rely on the ability of the backend to introspect column
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defaults (returning the result as ``Field.default``). You can set the
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``can_introspect_default`` database feature to ``False`` if your backend
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doesn't implement this. You may want to review the implementation on the
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backends that Django includes for reference (:ticket:`24245`).
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Default settings that were tuples are now lists
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The default settings in ``django.conf.global_settings`` were a combination of
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lists and tuples. All settings that were formerly tuples are now lists.
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``is_usable`` attribute on template loaders is removed
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Django template loaders previously required an ``is_usable`` attribute to be
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defined. If a loader was configured in the template settings and this attribute
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was ``False``, the loader would be silently ignored. In practice, this was only
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used by the egg loader to detect if setuptools was installed. The ``is_usable``
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attribute is now removed and the egg loader instead fails at runtime if
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setuptools is not installed.
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Related set direct assignment
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:ref:`Direct assignment <direct-assignment>`) used to perform a ``clear()``
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followed by a call to ``add()``. This caused needlessly large data changes
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and prevented using the :data:`~django.db.models.signals.m2m_changed` signal
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to track individual changes in many-to-many relations.
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Direct assignment now relies on the the new
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:meth:`django.db.models.fields.related.RelatedManager.set()` method on
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related managers which by default only processes changes between the
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existing related set and the one that's newly assigned. The previous behavior
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can be restored by replacing direct assignment by a call to ``set()`` with
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the keyword argument ``clear=True``.
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``ModelForm``, and therefore ``ModelAdmin``, internally rely on direct
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assignment for many-to-many relations and as a consequence now use the new
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behavior.
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Miscellaneous
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~~~~~~~~~~~~~
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* CSS and images in ``contrib.admin`` to support Internet Explorer 6 & 7 have
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been removed as these browsers have reached end-of-life.
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* ``django.http.responses.REASON_PHRASES`` and
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``django.core.handlers.wsgi.STATUS_CODE_TEXT`` have been removed. Use
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Python's stdlib instead: :data:`http.client.responses` for Python 3 and
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`httplib.responses`_ for Python 2.
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.. _`httplib.responses`: https://docs.python.org/2/library/httplib.html#httplib.responses
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* ``ValuesQuerySet`` and ``ValuesListQuerySet`` have been removed.
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.. _deprecated-features-1.9:
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Features deprecated in 1.9
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==========================
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``assignment_tag()``
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~~~~~~~~~~~~~~~~~~~~
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Django 1.4 added the ``assignment_tag`` helper to ease the creation of
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template tags that store results in a template variable. The
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:meth:`~django.template.Library.simple_tag` helper has gained this same
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ability, making the ``assignment_tag`` obsolete. Tags that use
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``assignment_tag`` should be updated to use ``simple_tag``.
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Miscellaneous
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~~~~~~~~~~~~~
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* The ``weak`` argument to ``django.dispatch.signals.Signal.disconnect()`` has
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been deprecated as it has no effect.
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* The ``check_aggregate_support()`` method of
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``django.db.backends.base.BaseDatabaseOperations`` has been deprecated and
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will be removed in Django 2.1. The more general ``check_expression_support()``
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should be used instead.
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* ``django.forms.extras`` is deprecated. You can find
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:class:`~django.forms.SelectDateWidget` in ``django.forms.widgets``
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(or simply ``django.forms``) instead.
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.. removed-features-1.9:
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Features removed in 1.9
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=======================
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These features have reached the end of their deprecation cycle and so have been
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removed in Django 1.9 (please see the :ref:`deprecation timeline
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<deprecation-removed-in-1.9>` for more details):
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* ``django.utils.dictconfig`` is removed.
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* ``django.utils.importlib`` is removed.
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* ``django.utils.tzinfo`` is removed.
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* ``django.utils.unittest`` is removed.
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* The ``syncdb`` command is removed.
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* ``django.db.models.signals.pre_syncdb`` and
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``django.db.models.signals.post_syncdb`` is removed.
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* Support for ``allow_syncdb`` on database routers is removed.
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* The legacy method of syncing apps without migrations is removed,
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and migrations are compulsory for all apps. This includes automatic
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loading of ``initial_data`` fixtures and support for initial SQL data.
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* All models need to be defined inside an installed application or declare an
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explicit :attr:`~django.db.models.Options.app_label`. Furthermore, it isn't
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possible to import them before their application is loaded. In particular, it
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isn't possible to import models inside the root package of an application.
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* The model and form ``IPAddressField`` is removed. A stub field remains for
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compatibility with historical migrations.
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* ``AppCommand.handle_app()`` is no longer be supported.
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* ``RequestSite`` and ``get_current_site()`` are no longer importable from
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``django.contrib.sites.models``.
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* FastCGI support via the ``runfcgi`` management command is removed.
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* ``django.utils.datastructures.SortedDict`` is removed.
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* ``ModelAdmin.declared_fieldsets`` is removed.
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* The ``util`` modules that provided backwards compatibility are removed:
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* ``django.contrib.admin.util``
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* ``django.contrib.gis.db.backends.util``
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* ``django.db.backends.util``
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* ``django.forms.util``
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* ``ModelAdmin.get_formsets`` is removed.
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* The backward compatible shims introduced to rename the
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``BaseMemcachedCache._get_memcache_timeout()`` method to
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``get_backend_timeout()`` is removed.
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* The ``--natural`` and ``-n`` options for :djadmin:`dumpdata` are removed.
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* The ``use_natural_keys`` argument for ``serializers.serialize()`` is removed.
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* Private API ``django.forms.forms.get_declared_fields()`` is removed.
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* The ability to use a ``SplitDateTimeWidget`` with ``DateTimeField`` is
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removed.
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* The ``WSGIRequest.REQUEST`` property is removed.
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* The class ``django.utils.datastructures.MergeDict`` is removed.
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* The ``zh-cn`` and ``zh-tw`` language codes are removed.
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* The internal ``django.utils.functional.memoize()`` is removed.
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* ``django.core.cache.get_cache`` is removed.
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* ``django.db.models.loading`` is removed.
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* Passing callable arguments to querysets is no longer possible.
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* ``BaseCommand.requires_model_validation`` is removed in favor of
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``requires_system_checks``. Admin validators is replaced by admin checks.
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* The ``ModelAdmin.validator_class`` and ``default_validator_class`` attributes
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are removed.
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* ``ModelAdmin.validate()`` is removed.
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* ``django.db.backends.DatabaseValidation.validate_field`` is removed in
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favor of the ``check_field`` method.
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* The ``check`` management command is removed.
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* ``django.utils.module_loading.import_by_path`` is removed in favor of
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``django.utils.module_loading.import_string``.
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* ``ssi`` and ``url`` template tags are removed from the ``future`` template
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tag library.
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* ``django.utils.text.javascript_quote()`` is removed.
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* Database test settings as independent entries in the database settings,
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prefixed by ``TEST_``, are no longer supported.
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* The `cache_choices` option to :class:`~django.forms.ModelChoiceField` and
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:class:`~django.forms.ModelMultipleChoiceField` is removed.
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* The default value of the
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:attr:`RedirectView.permanent <django.views.generic.base.RedirectView.permanent>`
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attribute has changed from ``True`` to ``False``.
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* ``django.contrib.sitemaps.FlatPageSitemap`` is removed in favor of
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``django.contrib.flatpages.sitemaps.FlatPageSitemap``.
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* Private API ``django.test.utils.TestTemplateLoader`` is removed.
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* The ``django.contrib.contenttypes.generic`` module is removed.
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