django/docs/releases/1.6.txt

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Django 1.6 release notes - UNDER DEVELOPMENT
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Welcome to Django 1.6!

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
1.5 or older versions. We've also dropped some features, which are detailed in
:doc:`our deprecation plan </internals/deprecation>`, and we've `begun the
deprecation process for some features`_.

.. _`new features`: `What's new in Django 1.6`_
.. _`backwards incompatible changes`: `Backwards incompatible changes in 1.6`_
.. _`begun the deprecation process for some features`: `Features deprecated in 1.6`_

What's new in Django 1.6
========================

Minor features
~~~~~~~~~~~~~~

* Authentication backends can raise ``PermissionDenied`` to immediately fail
  the authentication chain.

* The ``assertQuerysetEqual()`` now checks for undefined order and raises
  ``ValueError`` if undefined order is spotted. The order is seen as
  undefined if the given ``QuerySet`` isn't ordered and there are more than
  one ordered values to compare against.

Backwards incompatible changes in 1.6
=====================================

* The ``django.db.models.query.EmptyQuerySet`` can't be instantiated any more -
  it is only usable as a marker class for checking if
  :meth:`~django.db.models.query.QuerySet.none` has been called:
  ``isinstance(qs.none(), EmptyQuerySet)``

.. warning::

    In addition to the changes outlined in this section, be sure to review the
    :doc:`deprecation plan </internals/deprecation>` for any features that
    have 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.

Features deprecated in 1.6
==========================