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django/docs/releases/1.6.3.txt
Shai Berger 3a9a4570ef [1.7.x] Fixed #22343 -- Disallowed select_for_update in autocommit mode
The ticket was originally about two failing tests, which are
fixed by putting their queries in transactions.

Thanks Tim Graham for the report, Aymeric Augustin for the fix,
and Simon Charette, Tim Graham & Loïc Bistuer for review.

Backport of b990df1d63 from master
2014-04-10 01:44:30 +03:00

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==========================
Django 1.6.3 release notes
==========================
*Under development*
This is Django 1.6.3, a bugfix release for Django 1.6. Django 1.6.3 fixes
several bugs in 1.6.2 and makes one backwards-incompatible change:
``select_for_update()`` requires a transaction
==============================================
Historically, queries that use
:meth:`~django.db.models.query.QuerySet.select_for_update()` could be
executed in autocommit mode, outside of a transaction. Before Django
1.6, Django's automatic transactions mode allowed this to be used to
lock records until the next write operation. Django 1.6 introduced
database-level autocommit; since then, execution in such a context
voids the effect of ``select_for_update()``. It is, therefore, assumed
now to be an error, and raises an exception.
This change may cause test failures if you use ``select_for_update()``
in a test class which is a subclass of
:class:`~django.test.TransactionTestCase` rather than
:class:`~django.test.TestCase`.
This change was made because such errors can be caused by including an
app which expects global transactions (e.g. :setting:`ATOMIC_REQUESTS
<DATABASE-ATOMIC_REQUESTS>` set to True), or Django's old autocommit
behavior, in a project which runs without them; and further, such
errors may manifest as data-corruption bugs.
Other bugfixes and changes
==========================
* Content retrieved from the GeoIP library is now properly decoded from its
default ``iso-8859-1`` encoding
(`#21996 <http://code.djangoproject.com/ticket/21996>`_).
* Fixed ``AttributeError`` when using
:meth:`~django.db.models.query.QuerySet.bulk_create` with ``ForeignObject``
(`#21566 <http://code.djangoproject.com/ticket/21566>`_).
* Fixed crash of ``QuerySet``\s that use ``F() + timedelta()`` when their query
was compiled more once
(`#21643 <http://code.djangoproject.com/ticket/21643>`_).
* Prevented custom ``widget`` class attribute of
:class:`~django.forms.IntegerField` subclasses from being overwritten by the
code in their ``__init__`` method
(`#22245 <http://code.djangoproject.com/ticket/22245>`_).
* Improved :func:`~django.utils.html.strip_tags` accuracy (but it still cannot
guarantee an HTML-safe result, as stated in the documentation).
* Fixed a regression in the :mod:`django.contrib.gis` SQL compiler for
non-concrete fields (`#22250 <http://code.djangoproject.com/ticket/22250>`_).
* Fixed :attr:`ModelAdmin.preserve_filters
<django.contrib.admin.ModelAdmin.preserve_filters>` when running a site with
a URL prefix (`#21795 <http://code.djangoproject.com/ticket/21795>`_).
* Fixed a crash in the ``find_command`` management utility when the ``PATH``
environment variable wasn't set
(`#22256 <http://code.djangoproject.com/ticket/22256>`_).
Additionally, Django's vendored version of six, :mod:`django.utils.six` has been
upgraded to the latest release (1.6.1).