{"title":"Django 3.0.2 release notes","version":"dev","locale":"en","docname":"releases/3.0.2","url":"/en/dev/releases/3.0.2/","canonical":"https://djangodocs.dev/en/dev/releases/3.0.2/","summary":"Django 3.0.2 fixes several bugs in 3.0.1. Fixed a regression in Django 3.0 that didn’t include columns referenced by a Subquery() in the GROUP BY clause…","html":"<h1>Django 3.0.2 release notes<a class=\"heading-anchor\" href=\"#django-3-0-2-release-notes\"><span class=\"visually-hidden\">Link to this heading</span><span aria-hidden=\"true\">#</span></a></h1>\n<p><em>January 2, 2020</em></p>\n<p>Django 3.0.2 fixes several bugs in 3.0.1.</p>\n<section id=\"bugfixes\">\n<h2>Bugfixes<a class=\"heading-anchor\" href=\"#bugfixes\"><span class=\"visually-hidden\">Link to this heading</span><span aria-hidden=\"true\">#</span></a></h2>\n<ul class=\"simple\">\n<li><p>Fixed a regression in Django 3.0 that didn’t include columns referenced by a\n<code class=\"docutils literal notranslate\">Subquery()</code> in the <code class=\"docutils literal notranslate\">GROUP BY</code> clause (<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/31094\">#31094</a>).</p></li>\n<li><p>Fixed a regression in Django 3.0 where <code class=\"docutils literal notranslate\">QuerySet.exists()</code> crashed if a\nqueryset contained an aggregation over a <code class=\"docutils literal notranslate\">Subquery()</code> (<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/31109\">#31109</a>).</p></li>\n<li><p>Fixed a regression in Django 3.0 that caused a migration crash on PostgreSQL\n10+ when adding a foreign key and changing data in the same migration\n(<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/31106\">#31106</a>).</p></li>\n<li><p>Fixed a regression in Django 3.0 where loading fixtures crashed for models\ndefining a <a class=\"reference internal\" href=\"/en/dev/ref/models/fields/#django.db.models.Field.default\" title=\"django.db.models.Field.default\"><code class=\"xref py py-attr docutils literal notranslate\">default</code></a> for the primary key\n(<a class=\"extlink-ticket reference external\" href=\"https://code.djangoproject.com/ticket/31071\">#31071</a>).</p></li>\n</ul>\n</section>","rootId":"django-3-0-2-release-notes","toc":[{"title":"Bugfixes","anchor":"bugfixes","children":[]}],"breadcrumbs":[{"docname":"releases/index","title":"Release notes","url":"/en/dev/releases/"}],"prev":{"docname":"releases/3.0.3","title":"Django 3.0.3 release notes","url":"/en/dev/releases/3.0.3/"},"next":{"docname":"releases/3.0.1","title":"Django 3.0.1 release notes","url":"/en/dev/releases/3.0.1/"},"formats":{"html":"/en/dev/releases/3.0.2/","markdown":"/en/dev/releases/3.0.2.md","json":"/en/dev/releases/3.0.2.json"},"source":"https://github.com/django/django/blob/main/docs/releases/3.0.2.txt","official":"https://docs.djangoproject.com/en/dev/releases/3.0.2/","inVersions":["dev","6.1","6.0","5.2","5.1","5.0","4.2","4.1","4.0","3.2","3.1","3.0"],"inLocales":["en"]}