{"title":"Django 1.5.1 release notes","version":"dev","locale":"en","docname":"releases/1.5.1","url":"/en/dev/releases/1.5.1/","canonical":"https://djangodocs.dev/en/dev/releases/1.5.1/","summary":"This is Django 1.5.1, a bugfix release for Django 1.5. It’s completely backwards compatible with Django 1.5, but includes a handful of fixes.","html":"<h1>Django 1.5.1 release notes<a class=\"heading-anchor\" href=\"#django-1-5-1-release-notes\"><span class=\"visually-hidden\">Link to this heading</span><span aria-hidden=\"true\">#</span></a></h1>\n<p><em>March 28, 2013</em></p>\n<p>This is Django 1.5.1, a bugfix release for Django 1.5. It’s completely\nbackwards compatible with Django 1.5, but includes a handful of fixes.</p>\n<p>The biggest fix is for a memory leak introduced in Django 1.5. Under certain\ncircumstances, repeated iteration over querysets could leak memory - sometimes\nquite a bit of it. If you’d like more information, the details are in\n<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/19895\">our ticket tracker</a> (and in <a class=\"extlink-bpo reference external\" href=\"https://bugs.python.org/issue?&#64;action=redirect&amp;bpo=17468\">a related issue</a> in\nPython itself).</p>\n<p>If you’ve noticed memory problems under Django 1.5, upgrading to 1.5.1 should\nfix those issues.</p>\n<p>Django 1.5.1 also includes a couple smaller fixes:</p>\n<ul class=\"simple\">\n<li><p>Module-level warnings emitted during tests are no longer silently hidden\n(<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/18985\">#18985</a>).</p></li>\n<li><p>Prevented filtering on password hashes in the user admin (<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/20078\">#20078</a>).</p></li>\n</ul>","rootId":"django-1-5-1-release-notes","toc":[],"breadcrumbs":[{"docname":"releases/index","title":"Release notes","url":"/en/dev/releases/"}],"prev":{"docname":"releases/1.5.2","title":"Django 1.5.2 release notes","url":"/en/dev/releases/1.5.2/"},"next":{"docname":"releases/1.5","title":"Django 1.5 release notes","url":"/en/dev/releases/1.5/"},"formats":{"html":"/en/dev/releases/1.5.1/","markdown":"/en/dev/releases/1.5.1.md","json":"/en/dev/releases/1.5.1.json"},"source":"https://github.com/django/django/blob/main/docs/releases/1.5.1.txt","official":"https://docs.djangoproject.com/en/dev/releases/1.5.1/","inVersions":["dev","6.1","6.0","5.2","5.1","5.0","4.2","4.1","4.0","3.2","3.1","3.0","2.2","2.1","2.0","1.11","1.10","1.9","1.8"],"inLocales":["en"]}