django/docs/releases/1.8.1.txt

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==========================
Django 1.8.1 release notes
==========================
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*May 1, 2015*
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Django 1.8.1 fixes several bugs in 1.8 and includes some optimizations in the
migrations framework.
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Bugfixes
========
* Added support for serializing :class:`~datetime.timedelta` objects in
migrations (:ticket:`24566`).
* Restored proper parsing of the :djadmin:`testserver` command's positional
arguments (fixture names) (:ticket:`24571`).
* Prevented ``TypeError`` in translation functions ``check_for_language()`` and
``get_language_bidi()`` when translations are deactivated (:ticket:`24569`).
* Fixed :djadmin:`squashmigrations` command when using
:class:`~django.db.migrations.operations.SeparateDatabaseAndState`
(:ticket:`24278`).
* Stripped microseconds from ``datetime`` values when using an older version of
the MySQLdb DB API driver as it does not support fractional seconds
(:ticket:`24584`).
* Fixed a migration crash when altering
:class:`~django.db.models.ManyToManyField`\s (:ticket:`24513`).
* Fixed a crash with ``QuerySet.update()`` on foreign keys to one-to-one fields
(:ticket:`24578`).
* Fixed a regression in the model detail view of
:mod:`~django.contrib.admindocs` when a model has a reverse foreign key
relation (:ticket:`24624`).
* Prevented arbitrary file inclusions in :mod:`~django.contrib.admindocs`
(:ticket:`24625`).
* Fixed a crash with ``QuerySet.update()`` on foreign keys to instances with
``uuid`` primary keys (:ticket:`24611`).
* Fixed database introspection with SQLite 3.8.9 (released April 8, 2015)
(:ticket:`24637`).
* Updated ``urlpatterns`` examples generated by :djadmin:`startproject` to
remove usage of referencing views by dotted path in
``django.conf.urls.url()`` which is deprecated in Django 1.8
(:ticket:`24635`).
* Fixed queries where an expression was referenced in ``order_by()``, but wasn't
part of the select clause. An example query is
``qs.annotate(foo=F('field')).values('pk').order_by('foo'))`` (:ticket:`24615`).
* Fixed a database table name quoting regression (:ticket:`24605`).
* Prevented the loss of ``null``/``not null`` column properties during field
alteration of MySQL databases (:ticket:`24595`).
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* Fixed JavaScript path of ``contrib.admin``s related field widget when using
alternate static file storages (:ticket:`24655`).
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* Fixed a migration crash when adding new relations to models
(:ticket:`24573`).
* Fixed a migration crash when applying migrations with model managers on
Python 3 that were generated on Python 2 (:ticket:`24701`).
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* Restored the ability to use iterators as queryset filter arguments
(:ticket:`24719`).
* Fixed a migration crash when renaming the target model of a many-to-many
relation (:ticket:`24725`).
* Removed flushing of the test database with :option:`test --keepdb`, which
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prevented apps with data migrations from using the option (:ticket:`24729`).
* Fixed ``makemessages`` crash in some locales (:ticket:`23271`).
* Fixed help text positioning of ``contrib.admin`` fields that use the
``ModelAdmin.filter_horizontal`` and ``filter_vertical`` options
(:ticket:`24676`).
* Fixed ``AttributeError: function 'GDALAllRegister' not found`` error when
initializing ``contrib.gis`` on Windows.
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Optimizations
=============
* Changed ``ModelState`` to deepcopy fields instead of deconstructing and
reconstructing (:ticket:`24591`). This speeds up the rendering of model
states and reduces memory usage when running :djadmin:`manage.py migrate
<migrate>` (although other changes in this release may negate any performance
benefits).