<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang=""> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Django 1.8.2 release notes — Django 1.8.19 documentation</title> <link rel="stylesheet" href="../_static/default.css" type="text/css" /> <link rel="stylesheet" href="../_static/pygments.css" type="text/css" /> <script type="text/javascript"> var DOCUMENTATION_OPTIONS = { URL_ROOT: '../', VERSION: '1.8.19', COLLAPSE_INDEX: false, FILE_SUFFIX: '.html', HAS_SOURCE: true }; </script> <script type="text/javascript" src="../_static/jquery.js"></script> <script type="text/javascript" src="../_static/underscore.js"></script> <script type="text/javascript" src="../_static/doctools.js"></script> <link rel="index" title="Index" href="../genindex.html" /> <link rel="search" title="Search" href="../search.html" /> <link rel="top" title="Django 1.8.19 documentation" href="../contents.html" /> <link rel="up" title="Release notes" href="index.html" /> <link rel="next" title="Django 1.8.1 release notes" href="1.8.1.html" /> <link rel="prev" title="Django 1.8.3 release notes" href="1.8.3.html" /> <script type="text/javascript" src="../templatebuiltins.js"></script> <script type="text/javascript"> (function($) { if (!django_template_builtins) { // templatebuiltins.js missing, do nothing. return; } $(document).ready(function() { // Hyperlink Django template tags and filters var base = "../ref/templates/builtins.html"; if (base == "#") { // Special case for builtins.html itself base = ""; } // Tags are keywords, class '.k' $("div.highlight\\-html\\+django span.k").each(function(i, elem) { var tagname = $(elem).text(); if ($.inArray(tagname, django_template_builtins.ttags) != -1) { var fragment = tagname.replace(/_/, '-'); $(elem).html("<a href='" + base + "#" + fragment + "'>" + tagname + "</a>"); } }); // Filters are functions, class '.nf' $("div.highlight\\-html\\+django span.nf").each(function(i, elem) { var filtername = $(elem).text(); if ($.inArray(filtername, django_template_builtins.tfilters) != -1) { var fragment = filtername.replace(/_/, '-'); $(elem).html("<a href='" + base + "#" + fragment + "'>" + filtername + "</a>"); } }); }); })(jQuery); </script> </head> <body role="document"> <div class="document"> <div id="custom-doc" class="yui-t6"> <div id="hd"> <h1><a href="../index.html">Django 1.8.19 documentation</a></h1> <div id="global-nav"> <a title="Home page" href="../index.html">Home</a> | <a title="Table of contents" href="../contents.html">Table of contents</a> | <a title="Global index" href="../genindex.html">Index</a> | <a title="Module index" href="../py-modindex.html">Modules</a> </div> <div class="nav"> « <a href="1.8.3.html" title="Django 1.8.3 release notes">previous</a> | <a href="index.html" title="Release notes" accesskey="U">up</a> | <a href="1.8.1.html" title="Django 1.8.1 release notes">next</a> »</div> </div> <div id="bd"> <div id="yui-main"> <div class="yui-b"> <div class="yui-g" id="releases-1.8.2"> <div class="section" id="s-django-1-8-2-release-notes"> <span id="django-1-8-2-release-notes"></span><h1>Django 1.8.2 release notes<a class="headerlink" href="#django-1-8-2-release-notes" title="Permalink to this headline">¶</a></h1> <p><em>May 20, 2015</em></p> <p>Django 1.8.2 fixes a security issue and several bugs in 1.8.1.</p> <div class="section" id="s-fixed-session-flushing-in-the-cached-db-backend"> <span id="fixed-session-flushing-in-the-cached-db-backend"></span><h2>Fixed session flushing in the <code class="docutils literal"><span class="pre">cached_db</span></code> backend<a class="headerlink" href="#fixed-session-flushing-in-the-cached-db-backend" title="Permalink to this headline">¶</a></h2> <p>A change to <code class="docutils literal"><span class="pre">session.flush()</span></code> in the <code class="docutils literal"><span class="pre">cached_db</span></code> session backend in Django 1.8 mistakenly sets the session key to an empty string rather than <code class="docutils literal"><span class="pre">None</span></code>. An empty string is treated as a valid session key and the session cookie is set accordingly. Any users with an empty string in their session cookie will use the same session store. <code class="docutils literal"><span class="pre">session.flush()</span></code> is called by <code class="docutils literal"><span class="pre">django.contrib.auth.logout()</span></code> and, more seriously, by <code class="docutils literal"><span class="pre">django.contrib.auth.login()</span></code> when a user switches accounts. If a user is logged in and logs in again to a different account (without logging out) the session is flushed to avoid reuse. After the session is flushed (and its session key becomes <code class="docutils literal"><span class="pre">''</span></code>) the account details are set on the session and the session is saved. Any users with an empty string in their session cookie will now be logged into that account.</p> </div> <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>Fixed check for template engine alias uniqueness (<a class="reference external" href="https://code.djangoproject.com/ticket/24685">#24685</a>).</li> <li>Fixed crash when reusing the same <code class="docutils literal"><span class="pre">Case</span></code> instance in a query (<a class="reference external" href="https://code.djangoproject.com/ticket/24752">#24752</a>).</li> <li>Corrected join promotion for <code class="docutils literal"><span class="pre">Case</span></code> expressions. For example, annotating a query with a <code class="docutils literal"><span class="pre">Case</span></code> expression could unexpectedly filter out results (<a class="reference external" href="https://code.djangoproject.com/ticket/24766">#24766</a>).</li> <li>Fixed negated <code class="docutils literal"><span class="pre">Q</span></code> objects in expressions. Cases like <code class="docutils literal"><span class="pre">Case(When(~Q(friends__age__lte=30)))</span></code> tried to generate a subquery which resulted in a crash (<a class="reference external" href="https://code.djangoproject.com/ticket/24705">#24705</a>).</li> <li>Fixed incorrect GROUP BY clause generation on MySQL when the query’s model has a self-referential foreign key (<a class="reference external" href="https://code.djangoproject.com/ticket/24748">#24748</a>).</li> <li>Implemented <code class="docutils literal"><span class="pre">ForeignKey.get_db_prep_value()</span></code> so that <code class="docutils literal"><span class="pre">ForeignKey</span></code>s pointing to <a class="reference internal" href="../ref/models/fields.html#django.db.models.UUIDField" title="django.db.models.UUIDField"><code class="xref py py-class docutils literal"><span class="pre">UUIDField</span></code></a> and inheritance on models with <code class="docutils literal"><span class="pre">UUIDField</span></code> primary keys work correctly (<a class="reference external" href="https://code.djangoproject.com/ticket/24698">#24698</a>, <a class="reference external" href="https://code.djangoproject.com/ticket/24712">#24712</a>).</li> <li>Fixed <code class="docutils literal"><span class="pre">isnull</span></code> lookup for <code class="docutils literal"><span class="pre">HStoreField</span></code> (<a class="reference external" href="https://code.djangoproject.com/ticket/24751">#24751</a>).</li> <li>Fixed a MySQL crash when a migration removes a combined index (unique_together or index_together) containing a foreign key (<a class="reference external" href="https://code.djangoproject.com/ticket/24757">#24757</a>).</li> <li>Fixed session cookie deletion when using <a class="reference internal" href="../ref/settings.html#std:setting-SESSION_COOKIE_DOMAIN"><code class="xref std std-setting docutils literal"><span class="pre">SESSION_COOKIE_DOMAIN</span></code></a> (<a class="reference external" href="https://code.djangoproject.com/ticket/24799">#24799</a>).</li> <li>On PostgreSQL, when no access is granted for the <code class="docutils literal"><span class="pre">postgres</span></code> database, Django now falls back to the default database when it normally requires a “no database” connection (<a class="reference external" href="https://code.djangoproject.com/ticket/24791">#24791</a>).</li> <li>Fixed display of <code class="docutils literal"><span class="pre">contrib.admin</span></code>’s <code class="docutils literal"><span class="pre">ForeignKey</span></code> widget when it’s used in a row with other fields (<a class="reference external" href="https://code.djangoproject.com/ticket/24784">#24784</a>).</li> </ul> </div> </div> </div> </div> </div> <div class="yui-b" id="sidebar"> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <h3><a href="../contents.html">Table Of Contents</a></h3> <ul> <li><a class="reference internal" href="#">Django 1.8.2 release notes</a><ul> <li><a class="reference internal" href="#fixed-session-flushing-in-the-cached-db-backend">Fixed session flushing in the <code class="docutils literal"><span class="pre">cached_db</span></code> backend</a></li> <li><a class="reference internal" href="#bugfixes">Bugfixes</a></li> </ul> </li> </ul> <h3>Browse</h3> <ul> <li>Prev: <a href="1.8.3.html">Django 1.8.3 release notes</a></li> <li>Next: <a href="1.8.1.html">Django 1.8.1 release notes</a></li> </ul> <h3>You are here:</h3> <ul> <li> <a href="../index.html">Django 1.8.19 documentation</a> <ul><li><a href="index.html">Release notes</a> <ul><li>Django 1.8.2 release notes</li></ul> </li></ul> </li> </ul> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="../_sources/releases/1.8.2.txt" rel="nofollow">Show Source</a></li> </ul> </div> <div id="searchbox" style="display: none" role="search"> <h3>Quick search</h3> <form class="search" action="../search.html" method="get"> <div><input type="text" name="q" /></div> <div><input type="submit" value="Go" /></div> <input type="hidden" name="check_keywords" value="yes" /> <input type="hidden" name="area" value="default" /> </form> </div> <script type="text/javascript">$('#searchbox').show(0);</script> </div> </div> <h3>Last update:</h3> <p class="topless">Mar 10, 2018</p> </div> </div> <div id="ft"> <div class="nav"> « <a href="1.8.3.html" title="Django 1.8.3 release notes">previous</a> | <a href="index.html" title="Release notes" accesskey="U">up</a> | <a href="1.8.1.html" title="Django 1.8.1 release notes">next</a> »</div> </div> </div> <div class="clearer"></div> </div> </body> </html>