django/docs/releases/1.10.txt

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=============================================
Django 1.10 release notes - UNDER DEVELOPMENT
=============================================
Welcome to Django 1.10!
These release notes cover the `new features`_, as well as some `backwards
incompatible changes`_ you'll want to be aware of when upgrading from Django
1.9 or older versions. We've :ref:`dropped some features<removed-features-1.10>`
that have reached the end of their deprecation cycle, and we've `begun the
deprecation process for some features`_.
.. _`new features`: `What's new in Django 1.10`_
.. _`backwards incompatible changes`: `Backwards incompatible changes in 1.10`_
.. _`dropped some features`: `Features removed in 1.10`_
.. _`begun the deprecation process for some features`: `Features deprecated in 1.10`_
Python compatibility
====================
Like Django 1.9, Django 1.10 requires Python 2.7, 3.4, or 3.5. We **highly
recommend** and only officially support the latest release of each series.
What's new in Django 1.10
=========================
...
Minor features
~~~~~~~~~~~~~~
:mod:`django.contrib.admin`
^^^^^^^^^^^^^^^^^^^^^^^^^^^
* For sites running on a subpath, the default :attr:`URL for the "View site"
link <django.contrib.admin.AdminSite.site_url>` at the top of each admin page
will now point to ``request.META['SCRIPT_NAME']`` if set, instead of ``/``.
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* The success message that appears after adding or editing an object now
contains a link to the object's change form.
* All inline JavaScript is removed so you can enable the
``Content-Security-Policy`` HTTP header if you wish.
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:mod:`django.contrib.admindocs`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.auth`
^^^^^^^^^^^^^^^^^^^^^^^^^^
* The default iteration count for the PBKDF2 password hasher has been increased
by 25%. This backwards compatible change will not affect users who have
subclassed ``django.contrib.auth.hashers.PBKDF2PasswordHasher`` to change the
default value.
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* The :func:`~django.contrib.auth.views.logout` view sends "no-cache" headers
to prevent an issue where Safari caches redirects and prevents a user from
being able to log out.
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:mod:`django.contrib.contenttypes`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.gis`
^^^^^^^^^^^^^^^^^^^^^^^^^^
* :ref:`Distance lookups <distance-lookups>` now accept expressions as the
distance value parameter.
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* The new :attr:`GEOSGeometry.unary_union
<django.contrib.gis.geos.GEOSGeometry.unary_union>` property computes the
union of all the elements of this geometry.
* Added the :meth:`GEOSGeometry.covers()
<django.contrib.gis.geos.GEOSGeometry.covers>` binary predicate.
* Added the :meth:`GDALBand.statistics()
<django.contrib.gis.gdal.GDALBand.statistics>` method and
:attr:`~django.contrib.gis.gdal.GDALBand.mean`
and :attr:`~django.contrib.gis.gdal.GDALBand.std` attributes.
* Added support for the :class:`~django.contrib.gis.db.models.MakeLine`
aggregate and :class:`~django.contrib.gis.db.models.functions.GeoHash`
function on SpatiaLite.
* Added support for the
:class:`~django.contrib.gis.db.models.functions.Difference`,
:class:`~django.contrib.gis.db.models.functions.Intersection`, and
:class:`~django.contrib.gis.db.models.functions.SymDifference`
functions on MySQL.
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:mod:`django.contrib.messages`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.postgres`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.redirects`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.sessions`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* The :djadmin:`clearsessions` management command now removes file-based
sessions.
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:mod:`django.contrib.sitemaps`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.sites`
^^^^^^^^^^^^^^^^^^^^^^^^^^^
* The :class:`~django.contrib.sites.models.Site` model now supports
:ref:`natural keys <topics-serialization-natural-keys>`.
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:mod:`django.contrib.staticfiles`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
:mod:`django.contrib.syndication`
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
* ...
Cache
^^^^^
* The file-based cache backend now uses the highest pickling protocol.
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CSRF
^^^^
* The default :setting:`CSRF_FAILURE_VIEW`, ``views.csrf.csrf_failure()`` now
accepts an optional ``template_name`` parameter, defaulting to
``'403_csrf.html'``, to control the template used to render the page.
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Database backends
^^^^^^^^^^^^^^^^^
* ...
Email
^^^^^
* ...
File Storage
^^^^^^^^^^^^
* ...
File Uploads
^^^^^^^^^^^^
* ...
Forms
^^^^^
* ...
Generic Views
^^^^^^^^^^^^^
* ...
Internationalization
^^^^^^^^^^^^^^^^^^^^
* ...
Management Commands
^^^^^^^^^^^^^^^^^^^
* The new :djadminopt:`--fail-level` option of the :djadmin:`check` command
allows specifying the message level that will cause the command to exit with
a non-zero status.
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* The new :djadminopt:`makemigrations --check <--check>` option makes the
command exit with a non-zero status when model changes without migrations are
detected.
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Migrations
^^^^^^^^^^
* Added support for serialization of ``enum.Enum`` objects.
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Models
^^^^^^
* Reverse foreign keys from proxy models are now propagated to their
concrete class. The reverse relation attached by a
:class:`~django.db.models.ForeignKey` pointing to a proxy model is now
accessible as a descriptor on the proxied model class and may be referenced in
queryset filtering.
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* The new :meth:`Field.rel_db_type() <django.db.models.Field.rel_db_type>`
method returns the database column data type for fields such as ``ForeignKey``
and ``OneToOneField`` that point to another field.
* The :attr:`~django.db.models.Func.arity` class attribute is added to
:class:`~django.db.models.Func`. This attribute can be used to set the number
of arguments the function accepts.
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Requests and Responses
^^^^^^^^^^^^^^^^^^^^^^
* Added ``request.user`` to the debug view.
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* Added :class:`~django.http.HttpResponse` methods
:meth:`~django.http.HttpResponse.readable()` and
:meth:`~django.http.HttpResponse.seekable()` to make an instance a
stream-like object and allow wrapping it with :py:class:`io.TextIOWrapper`.
Serialization
^^^^^^^^^^^^^
* The ``django.core.serializers.json.DjangoJSONEncoder`` now knows how to
serialize lazy strings, typically used for translatable content.
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Signals
^^^^^^^
* ...
Templates
^^^^^^^^^
* Added the ``autoescape`` option to the
:class:`~django.template.backends.django.DjangoTemplates` backend and the
:class:`~django.template.Engine` class.
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Tests
^^^^^
* ...
URLs
^^^^
* An addition in :func:`django.setup()` allows URL resolving that happens
outside of the request/response cycle (e.g. in management commands and
standalone scripts) to take :setting:`FORCE_SCRIPT_NAME` into account when it
is set.
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Validators
^^^^^^^^^^
* ...
Backwards incompatible changes in 1.10
======================================
.. warning::
In addition to the changes outlined in this section, be sure to review the
:ref:`removed-features-1.10` for the features that have reached the end of
their deprecation cycle and therefore been removed. If you haven't updated
your code within the deprecation timeline for a given feature, its removal
may appear as a backwards incompatible change.
Database backend API
~~~~~~~~~~~~~~~~~~~~
* ...
``select_related()`` prohibits non-relational fields for nested relations
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Django 1.8 added validation for non-relational fields in ``select_related()``::
>>> Book.objects.select_related('title')
Traceback (most recent call last):
...
FieldError: Non-relational field given in select_related: 'title'
But it didn't prohibit nested non-relation fields as it does now::
>>> Book.objects.select_related('author__name')
Traceback (most recent call last):
...
FieldError: Non-relational field given in select_related: 'name'
``_meta.get_fields()`` returns consistent reverse fields for proxy models
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Before Django 1.10, the :meth:`~django.db.models.options.Options.get_fields`
method returned different reverse fields when called on a proxy model compared
to its proxied concrete class. This inconsistency was fixed by returning the
full set of fields pointing to a concrete class or one of its proxies in both
cases.
:attr:`AbstractUser.username <django.contrib.auth.models.User.username>` ``max_length`` increased to 254
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
A migration for :attr:`django.contrib.auth.models.User.username` is included.
If you have a custom user model inheriting from ``AbstractUser``, you'll need
to generate and apply a database migration for your user model.
If you want to preserve the 30 character limit for usernames, use a custom form
when creating a user or changing usernames::
from django.contrib.auth.forms import UserCreationForm
class MyUserCreationForm(UserCreationForm):
username = forms.CharField(
max_length=30,
help_text='Required. 30 characters or fewer. Letters, digits and @/./+/-/_ only.',
)
If you wish to keep this restriction in the admin, set ``UserAdmin.add_form``
to use this form::
from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
from django.contrib.auth.models import User
class UserAdmin(BaseUserAdmin):
add_form = MyUserCreationForm
admin.site.unregister(User)
admin.site.register(User, UserAdmin)
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Miscellaneous
~~~~~~~~~~~~~
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* The ``repr()`` of a ``QuerySet`` is wrapped in ``<QuerySet >`` to
disambiguate it from a plain list when debugging.
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* Support for SpatiaLite < 3.0 and GEOS < 3.3 is dropped.
* ``utils.version.get_version()`` returns :pep:`440` compliant release
candidate versions (e.g. '1.10rc1' instead of '1.10c1').
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.. _deprecated-features-1.10:
Features deprecated in 1.10
===========================
Direct assignment to a reverse foreign key or many-to-many relation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Instead of assigning related objects using direct assignment::
>>> new_list = [obj1, obj2, obj3]
>>> e.related_set = new_list
Use the :meth:`~django.db.models.fields.related.RelatedManager.set` method
added in Django 1.9::
>>> e.related_set.set([obj1, obj2, obj3])
This prevents confusion about an assignment resulting in an implicit save.
:mod:`django.contrib.gis`
~~~~~~~~~~~~~~~~~~~~~~~~~
* The ``get_srid()`` and ``set_srid()`` methods of
:class:`~django.contrib.gis.geos.GEOSGeometry` are deprecated in favor
of the :attr:`~django.contrib.gis.geos.GEOSGeometry.srid` property.
* The ``get_x()``, ``set_x()``, ``get_y()``, ``set_y()``, ``get_z()``, and
``set_z()`` methods of :class:`~django.contrib.gis.geos.Point` are deprecated
in favor of the ``x``, ``y``, and ``z`` properties.
* The ``get_coords()`` and ``set_coords()`` methods of
:class:`~django.contrib.gis.geos.Point` are deprecated in favor of the
``tuple`` property.
* The ``cascaded_union`` property of
:class:`~django.contrib.gis.geos.MultiPolygon` is deprecated in favor of the
:attr:`~django.contrib.gis.geos.GEOSGeometry.unary_union` property.
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Miscellaneous
~~~~~~~~~~~~~
* The ``makemigrations --exit`` option is deprecated in favor of the
:djadminopt:`--check` option.
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.. _removed-features-1.10:
Features removed in 1.10
========================
These features have reached the end of their deprecation cycle and so have been
removed in Django 1.10 (please see the :ref:`deprecation timeline
<deprecation-removed-in-1.10>` for more details):
* Support for calling a ``SQLCompiler`` directly as an alias for calling its
``quote_name_unless_alias`` method is removed.
* The ``cycle`` and ``firstof`` template tags are removed from the ``future``
template tag library.
* ``django.conf.urls.patterns()`` is removed.
* Support for the ``prefix`` argument to
``django.conf.urls.i18n.i18n_patterns()`` is removed.
* ``SimpleTestCase.urls`` is removed.
* Using an incorrect count of unpacked values in the ``for`` template tag
raises an exception rather than failing silently.
* The ability to :func:`~django.core.urlresolvers.reverse` URLs using a dotted
Python path is removed.
* Support for ``optparse`` is dropped for custom management commands.
* The class ``django.core.management.NoArgsCommand`` is removed.
* ``django.core.context_processors`` module is removed.
* ``django.db.models.sql.aggregates`` module is removed.
* ``django.contrib.gis.db.models.sql.aggregates`` module is removed.
* The following methods and properties of ``django.db.sql.query.Query`` are
removed:
* Properties: ``aggregates`` and ``aggregate_select``
* Methods: ``add_aggregate``, ``set_aggregate_mask``, and
``append_aggregate_mask``.
* ``django.template.resolve_variable`` is removed.
* The following private APIs are removed from
:class:`django.db.models.options.Options` (``Model._meta``):
* ``get_field_by_name()``
* ``get_all_field_names()``
* ``get_fields_with_model()``
* ``get_concrete_fields_with_model()``
* ``get_m2m_with_model()``
* ``get_all_related_objects()``
* ``get_all_related_objects_with_model()``
* ``get_all_related_many_to_many_objects()``
* ``get_all_related_m2m_objects_with_model()``
* The ``error_message`` argument of ``django.forms.RegexField`` is removed.
* The ``unordered_list`` filter no longer supports old style lists.
* Support for string ``view`` arguments to ``url()`` is removed.
* The backward compatible shim to rename ``django.forms.Form._has_changed()``
to ``has_changed()`` is removed.
* The ``removetags`` template filter is removed.
* The ``remove_tags()`` and ``strip_entities()`` functions in
``django.utils.html`` is removed.
* The ``is_admin_site`` argument to
``django.contrib.auth.views.password_reset()`` is removed.
* ``django.db.models.field.subclassing.SubfieldBase`` is removed.
* ``django.utils.checksums`` is removed.
* The ``original_content_type_id`` attribute on
``django.contrib.admin.helpers.InlineAdminForm`` is removed.
* The backwards compatibility shim to allow ``FormMixin.get_form()`` to be
defined with no default value for its ``form_class`` argument is removed.
* The following settings are removed:
* ``ALLOWED_INCLUDE_ROOTS``
* ``TEMPLATE_CONTEXT_PROCESSORS``
* ``TEMPLATE_DEBUG``
* ``TEMPLATE_DIRS``
* ``TEMPLATE_LOADERS``
* ``TEMPLATE_STRING_IF_INVALID``
* The backwards compatibility alias ``django.template.loader.BaseLoader`` is
removed.
* Django template objects returned by
:func:`~django.template.loader.get_template` and
:func:`~django.template.loader.select_template` no longer accept a
:class:`~django.template.Context` in their
:meth:`~django.template.backends.base.Template.render()` method.
* :doc:`Template response APIs </ref/template-response>` enforce the use of
:class:`dict` and backend-dependent template objects instead of
:class:`~django.template.Context` and :class:`~django.template.Template`
respectively.
* The ``current_app`` parameter for the following function and classes is
removed:
* ``django.shortcuts.render()``
* ``django.template.Context()``
* ``django.template.RequestContext()``
* ``django.template.response.TemplateResponse()``
* The ``dictionary`` and ``context_instance`` parameters for the following
functions are removed:
* ``django.shortcuts.render()``
* ``django.shortcuts.render_to_response()``
* ``django.template.loader.render_to_string()``
* The ``dirs`` parameter for the following functions is removed:
* ``django.template.loader.get_template()``
* ``django.template.loader.select_template()``
* ``django.shortcuts.render()``
* ``django.shortcuts.render_to_response()``
* Session verification is enabled regardless of whether or not
``'django.contrib.auth.middleware.SessionAuthenticationMiddleware'`` is in
``MIDDLEWARE_CLASSES``. ``SessionAuthenticationMiddleware`` no longer has
any purpose and can be removed from ``MIDDLEWARE_CLASSES``. It's kept as
a stub until Django 2.0 as a courtesy for users who don't read this note.
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* Private attribute ``django.db.models.Field.related`` is removed.
* The ``--list`` option of the ``migrate`` management command is removed.
* The ``ssi`` template tag is removed.
* Support for the ``=`` comparison operator in the ``if`` template tag is
removed.
* The backwards compatibility shims to allow ``Storage.get_available_name()``
and ``Storage.save()`` to be defined without a ``max_length`` argument are
removed.
* Support for the legacy ``%(<foo>)s`` syntax in ``ModelFormMixin.success_url``
is removed.
* ``GeoQuerySet`` aggregate methods ``collect()``, ``extent()``, ``extent3d()``,
``make_line()``, and ``unionagg()`` are removed.
* The ability to specify ``ContentType.name`` when creating a content type
instance is removed.
* Support for the old signature of ``allow_migrate`` is removed.
* Support for the syntax of ``{% cycle %}`` that uses comma-separated arguments
is removed.
* The warning that :class:`~django.core.signing.Signer` issued when given an
invalid separator is now a ``ValueError``.