django/docs/releases/1.11.txt

=============================================
Django 1.11 release notes - UNDER DEVELOPMENT
=============================================

Welcome to Django 1.11!

These release notes cover the :ref:`new features <whats-new-1.11>`, as well as
some :ref:`backwards incompatible changes <backwards-incompatible-1.11>` you'll
want to be aware of when upgrading from Django 1.10 or older versions. We've
:ref:`begun the deprecation process for some features
<deprecated-features-1.11>`.

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

Django 1.11 is designated as a :term:`long-term support release`. It will
receive security updates for at least three years after its release. Support
for the previous LTS, Django 1.8, will end 6 months after the release date of
Django 1.11.

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

Like Django 1.10, Django 1.11 requires Python 2.7, 3.4, or 3.5. We **highly
recommend** and only officially support the latest release of each series.

The Django 1.11.x series is the last to support Python 2. The next major
release, Django 2.0, will only support Python 3.5+.

Deprecating warnings are no longer loud by default
==================================================

Unlike older versions of Django, Django's own deprecation warnings are no
longer displayed by default. This is consistent with Python's default behavior.

This change allows third-party apps to support both Django 1.11 LTS and Django
1.8 LTS without having to add code to avoid deprecation warnings.

Following the release of Django 2.0, we suggest that third-party app authors
drop support for all versions of Django prior to 1.11. At that time, you should
be able run your package's tests using ``python -Wd`` so that deprecation
warnings do appear. After making the deprecation warning fixes, your app should
be compatible with Django 2.0.

.. _whats-new-1.11:

What's new in Django 1.11
=========================

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

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

* :attr:`.ModelAdmin.date_hierarchy` can now reference fields across relations.

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

* ...

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

* The default iteration count for the PBKDF2 password hasher is increased by
  20%.

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

* ...

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

* ...

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

* ...

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

* The new ``distinct`` argument for
  :class:`~django.contrib.postgres.aggregates.StringAgg` determines if
  concatenated values will be distinct.

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

* ...

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

* ...

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

* ...

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

* ...

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

* ...

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

* ...

Cache
~~~~~

* ...

CSRF
~~~~

* ...

Database backends
~~~~~~~~~~~~~~~~~

* ...

Email
~~~~~

* Added the :setting:`EMAIL_USE_LOCALTIME` setting to allow sending SMTP date
  headers in the local time zone rather than in UTC.

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

* To make it wrappable by :class:`io.TextIOWrapper`,
  :class:`~django.core.files.File` now has the ``readable()``, ``writable()``,
  and ``seekable()`` methods.

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

* ...

Forms
~~~~~

* The new :attr:`CharField.empty_value <django.forms.CharField.empty_value>`
  attribute allows specifying the Python value to use to represent "empty".

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

* ...

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

* ...

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

* The new :option:`loaddata --exclude` option allows excluding models and apps
  while loading data from fixtures.

Migrations
~~~~~~~~~~

* ...

Models
~~~~~~

* Added support for callable values in the ``defaults`` argument of
  :meth:`QuerySet.update_or_create()
  <django.db.models.query.QuerySet.update_or_create>` and
  :meth:`~django.db.models.query.QuerySet.get_or_create`.

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

* Added :meth:`QueryDict.fromkeys() <django.http.QueryDict.fromkeys>`.

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

* The new ``django.core.serializers.base.Serializer.stream_class`` attribute
  allows subclasses to customize the default stream.

Signals
~~~~~~~

* ...

Templates
~~~~~~~~~

* :meth:`~django.utils.safestring.mark_safe` can now be used as a decorator.

Tests
~~~~~

* ...

URLs
~~~~

* ...

Validators
~~~~~~~~~~

* ...

.. _backwards-incompatible-1.11:

Backwards incompatible changes in 1.11
======================================

:mod:`django.contrib.gis`
-------------------------

* To simplify the codebase and because it's easier to install than when
  ``contrib.gis`` was first released, :ref:`gdalbuild` is now a required
  dependency for GeoDjango. In older versions, it's only required for SQLite.

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

* ...

Dropped support for PostgreSQL 9.2 and PostGIS 2.0
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Upstream support for PostgreSQL 9.2 ends in September 2017. As a consequence,
Django 1.11 sets PostgreSQL 9.3 as the minimum version it officially supports.

Support for PostGIS 2.0 is also removed as PostgreSQL 9.2 is the last version
to support it.

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

* If no items in the feed have a ``pubdate`` or ``updateddate`` attribute,
  :meth:`SyndicationFeed.latest_post_date()
  <django.utils.feedgenerator.SyndicationFeed.latest_post_date>` now returns
  the current UTC date/time, instead of a datetime without any timezone
  information.

* Support for SpatiaLite < 4.0 is dropped.

* CSRF failures are logged to the ``django.security.csrf ``` logger instead of
  ``django.request``.

* :setting:`ALLOWED_HOSTS` validation is no longer disabled when running tests.
  If your application includes tests with custom host names, you must include
  those host names in :setting:`ALLOWED_HOSTS`. See
  :ref:`topics-testing-advanced-multiple-hosts`.

* Using a foreign key's id (e.g. ``'field_id'``) in ``ModelAdmin.list_display``
  displays the related object's ID. Remove the ``_id`` suffix if you want the
  old behavior of the string representation of the object.

* In model forms, :class:`~django.db.models.CharField` with ``null=True`` now
  saves ``NULL`` for blank values instead of empty strings.

* On Oracle, :meth:`Model.validate_unique()
  <django.db.models.Model.validate_unique>` no longer checks empty strings for
  uniqueness as the database interprets the value as ``NULL``.

.. _deprecated-features-1.11:

Features deprecated in 1.11
===========================

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

* ...