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<div class="section" id="s-django-1-8-1-release-notes">
<span id="django-1-8-1-release-notes"></span><h1>Django 1.8.1 release notes<a class="headerlink" href="#django-1-8-1-release-notes" title="Permalink to this headline">¶</a></h1>
<p><em>May 1, 2015</em></p>
<p>Django 1.8.1 fixes several bugs in 1.8 and includes some optimizations in the
migrations framework.</p>
<div class="section" id="s-bugfixes">
<span id="bugfixes"></span><h2>Bugfixes<a class="headerlink" href="#bugfixes" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>Added support for serializing <code class="xref py py-class docutils literal"><span class="pre">timedelta</span></code> objects in
migrations (<a class="reference external" href="https://code.djangoproject.com/ticket/24566">#24566</a>).</li>
<li>Restored proper parsing of the <a class="reference internal" href="../ref/django-admin.html#django-admin-testserver"><code class="xref std std-djadmin docutils literal"><span class="pre">testserver</span></code></a> command’s positional
arguments (fixture names) (<a class="reference external" href="https://code.djangoproject.com/ticket/24571">#24571</a>).</li>
<li>Prevented <code class="docutils literal"><span class="pre">TypeError</span></code> in translation functions <code class="docutils literal"><span class="pre">check_for_language()</span></code> and
<code class="docutils literal"><span class="pre">get_language_bidi()</span></code> when translations are deactivated (<a class="reference external" href="https://code.djangoproject.com/ticket/24569">#24569</a>).</li>
<li>Fixed <a class="reference internal" href="../ref/django-admin.html#django-admin-squashmigrations"><code class="xref std std-djadmin docutils literal"><span class="pre">squashmigrations</span></code></a> command when using
<a class="reference internal" href="../ref/migration-operations.html#django.db.migrations.operations.SeparateDatabaseAndState" title="django.db.migrations.operations.SeparateDatabaseAndState"><code class="xref py py-class docutils literal"><span class="pre">SeparateDatabaseAndState</span></code></a>
(<a class="reference external" href="https://code.djangoproject.com/ticket/24278">#24278</a>).</li>
<li>Stripped microseconds from <code class="docutils literal"><span class="pre">datetime</span></code> values when using an older version of
the MySQLdb DB API driver as it does not support fractional seconds
(<a class="reference external" href="https://code.djangoproject.com/ticket/24584">#24584</a>).</li>
<li>Fixed a migration crash when altering
<a class="reference internal" href="../ref/models/fields.html#django.db.models.ManyToManyField" title="django.db.models.ManyToManyField"><code class="xref py py-class docutils literal"><span class="pre">ManyToManyField</span></code></a>s (<a class="reference external" href="https://code.djangoproject.com/ticket/24513">#24513</a>).</li>
<li>Fixed a crash with <code class="docutils literal"><span class="pre">QuerySet.update()</span></code> on foreign keys to one-to-one fields
(<a class="reference external" href="https://code.djangoproject.com/ticket/24578">#24578</a>).</li>
<li>Fixed a regression in the model detail view of
<a class="reference internal" href="../ref/contrib/admin/admindocs.html#module-django.contrib.admindocs" title="django.contrib.admindocs: Django's admin documentation generator."><code class="xref py py-mod docutils literal"><span class="pre">admindocs</span></code></a> when a model has a reverse foreign key
relation (<a class="reference external" href="https://code.djangoproject.com/ticket/24624">#24624</a>).</li>
<li>Prevented arbitrary file inclusions in <a class="reference internal" href="../ref/contrib/admin/admindocs.html#module-django.contrib.admindocs" title="django.contrib.admindocs: Django's admin documentation generator."><code class="xref py py-mod docutils literal"><span class="pre">admindocs</span></code></a>
(<a class="reference external" href="https://code.djangoproject.com/ticket/24625">#24625</a>).</li>
<li>Fixed a crash with <code class="docutils literal"><span class="pre">QuerySet.update()</span></code> on foreign keys to instances with
<code class="docutils literal"><span class="pre">uuid</span></code> primary keys (<a class="reference external" href="https://code.djangoproject.com/ticket/24611">#24611</a>).</li>
<li>Fixed database introspection with SQLite 3.8.9 (released April 8, 2015)
(<a class="reference external" href="https://code.djangoproject.com/ticket/24637">#24637</a>).</li>
<li>Updated <code class="docutils literal"><span class="pre">urlpatterns</span></code> examples generated by <a class="reference internal" href="../ref/django-admin.html#django-admin-startproject"><code class="xref std std-djadmin docutils literal"><span class="pre">startproject</span></code></a> to
remove usage of referencing views by dotted path in
<a class="reference internal" href="../ref/urls.html#django.conf.urls.url" title="django.conf.urls.url"><code class="xref py py-func docutils literal"><span class="pre">url()</span></code></a> which is deprecated in Django 1.8
(<a class="reference external" href="https://code.djangoproject.com/ticket/24635">#24635</a>).</li>
<li>Fixed queries where an expression was referenced in <code class="docutils literal"><span class="pre">order_by()</span></code>, but wasn’t
part of the select clause. An example query is
<code class="docutils literal"><span class="pre">qs.annotate(foo=F('field')).values('pk').order_by('foo'))</span></code> (<a class="reference external" href="https://code.djangoproject.com/ticket/24615">#24615</a>).</li>
<li>Fixed a database table name quoting regression (<a class="reference external" href="https://code.djangoproject.com/ticket/24605">#24605</a>).</li>
<li>Prevented the loss of <code class="docutils literal"><span class="pre">null</span></code>/<code class="docutils literal"><span class="pre">not</span> <span class="pre">null</span></code> column properties during field
alteration of MySQL databases (<a class="reference external" href="https://code.djangoproject.com/ticket/24595">#24595</a>).</li>
<li>Fixed JavaScript path of <code class="docutils literal"><span class="pre">contrib.admin</span></code>’s related field widget when using
alternate static file storages (<a class="reference external" href="https://code.djangoproject.com/ticket/24655">#24655</a>).</li>
<li>Fixed a migration crash when adding new relations to models
(<a class="reference external" href="https://code.djangoproject.com/ticket/24573">#24573</a>).</li>
<li>Fixed a migration crash when applying migrations with model managers on
Python 3 that were generated on Python 2 (<a class="reference external" href="https://code.djangoproject.com/ticket/24701">#24701</a>).</li>
<li>Restored the ability to use iterators as queryset filter arguments
(<a class="reference external" href="https://code.djangoproject.com/ticket/24719">#24719</a>).</li>
<li>Fixed a migration crash when renaming the target model of a many-to-many
relation (<a class="reference external" href="https://code.djangoproject.com/ticket/24725">#24725</a>).</li>
<li>Removed flushing of the test database with <a class="reference internal" href="../ref/django-admin.html#django-admin-option---keepdb"><code class="xref std std-djadminopt docutils literal"><span class="pre">--keepdb</span></code></a>, which
prevented apps with data migrations from using the option (<a class="reference external" href="https://code.djangoproject.com/ticket/24729">#24729</a>).</li>
<li>Fixed <code class="docutils literal"><span class="pre">makemessages</span></code> crash in some locales (<a class="reference external" href="https://code.djangoproject.com/ticket/23271">#23271</a>).</li>
<li>Fixed help text positioning of <code class="docutils literal"><span class="pre">contrib.admin</span></code> fields that use the
<code class="docutils literal"><span class="pre">ModelAdmin.filter_horizontal</span></code> and <code class="docutils literal"><span class="pre">filter_vertical</span></code> options
(<a class="reference external" href="https://code.djangoproject.com/ticket/24676">#24676</a>).</li>
<li>Fixed <cite>AttributeError: function ‘GDALAllRegister’ not found</cite> error when
initializing <code class="docutils literal"><span class="pre">contrib.gis</span></code> on Windows.</li>
</ul>
</div>
<div class="section" id="s-optimizations">
<span id="optimizations"></span><h2>Optimizations<a class="headerlink" href="#optimizations" title="Permalink to this headline">¶</a></h2>
<ul class="simple">
<li>Changed <code class="docutils literal"><span class="pre">ModelState</span></code> to deepcopy fields instead of deconstructing and
reconstructing (<a class="reference external" href="https://code.djangoproject.com/ticket/24591">#24591</a>). This speeds up the rendering of model
states and reduces memory usage when running <a class="reference internal" href="../ref/django-admin.html#django-admin-migrate"><code class="xref std std-djadmin docutils literal"><span class="pre">manage.py</span> <span class="pre">migrate</span></code></a> (although other changes in this release may negate any performance
benefits).</li>
</ul>
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<h3><a href="../contents.html">Table Of Contents</a></h3>
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<li><a class="reference internal" href="#">Django 1.8.1 release notes</a><ul>
<li><a class="reference internal" href="#bugfixes">Bugfixes</a></li>
<li><a class="reference internal" href="#optimizations">Optimizations</a></li>
</ul>
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