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<h1 id="django-rest-framework-312">Django REST framework 3.12<a class="headerlink" href="#django-rest-framework-312" title="Permanent link">&para;</a></h1>
<p>REST framework 3.12 brings a handful of refinements to the OpenAPI schema
generation, plus support for Django's new database-agnostic <code>JSONField</code>,
and some improvements to the <code>SearchFilter</code> class.</p>
<h2 id="grouping-operations-with-tags">Grouping operations with tags.<a class="headerlink" href="#grouping-operations-with-tags" title="Permanent link">&para;</a></h2>
<p>Open API schemas will now automatically include tags, based on the first element
in the URL path.</p>
<p>For example...</p>
<table>
<thead>
<tr>
<th>Method</th>
<th>Path</th>
<th>Tags</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>GET</code>, <code>PUT</code>, <code>PATCH</code>, <code>DELETE</code></td>
<td><code>/users/{id}/</code></td>
<td><code>['users']</code></td>
</tr>
<tr>
<td><code>GET</code>, <code>POST</code></td>
<td><code>/users/</code></td>
<td><code>['users']</code></td>
</tr>
<tr>
<td><code>GET</code>, <code>PUT</code>, <code>PATCH</code>, <code>DELETE</code></td>
<td><code>/orders/{id}/</code></td>
<td><code>['orders']</code></td>
</tr>
<tr>
<td><code>GET</code>, <code>POST</code></td>
<td><code>/orders/</code></td>
<td><code>['orders']</code></td>
</tr>
</tbody>
</table>
<p>The tags used for a particular view may also be overridden...</p>
<div class="language-python highlight"><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">MyOrders</span><span class="p">(</span><span class="n">APIView</span><span class="p">):</span>
<span class="n">schema</span> <span class="o">=</span> <span class="n">AutoSchema</span><span class="p">(</span><span class="n">tags</span><span class="o">=</span><span class="p">[</span><span class="s2">&quot;users&quot;</span><span class="p">,</span> <span class="s2">&quot;orders&quot;</span><span class="p">])</span>
<span class="o">...</span>
</code></pre></div>
<p>See <a href="https://www.django-rest-framework.org/api-guide/schemas/#grouping-operations-with-tags">the schema documentation</a> for more information.</p>
<h2 id="customizing-the-operation-id">Customizing the operation ID.<a class="headerlink" href="#customizing-the-operation-id" title="Permanent link">&para;</a></h2>
<p>REST framework automatically determines operation IDs to use in OpenAPI
schemas. The latest version provides more control for overriding the behavior
used to generate the operation IDs.</p>
<p>See <a href="https://www.django-rest-framework.org/api-guide/schemas/#operationid">the schema documentation</a> for more information.</p>
<h2 id="support-for-openapi-components">Support for OpenAPI components.<a class="headerlink" href="#support-for-openapi-components" title="Permanent link">&para;</a></h2>
<p>In order to output more graceful OpenAPI schemes, REST framework 3.12 now
defines components in the schema, and then references them inside request
and response objects. This is in contrast with the previous approach, which
fully expanded the request and response bodies for each operation.</p>
<p>The names used for a component default to using the serializer class name, <a href="https://www.django-rest-framework.org/api-guide/schemas/#components">but
may be overridden if needed</a>...</p>
<div class="language-python highlight"><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">MyOrders</span><span class="p">(</span><span class="n">APIView</span><span class="p">):</span>
<span class="n">schema</span> <span class="o">=</span> <span class="n">AutoSchema</span><span class="p">(</span><span class="n">component_name</span><span class="o">=</span><span class="s2">&quot;OrderDetails&quot;</span><span class="p">)</span>
</code></pre></div>
<h2 id="more-public-api">More Public API<a class="headerlink" href="#more-public-api" title="Permanent link">&para;</a></h2>
<p>Many methods on the <code>AutoSchema</code> class have now been promoted to public API,
allowing you to more fully customize the schema generation. The following methods
are now available for overriding...</p>
<ul>
<li><code>get_path_parameters</code></li>
<li><code>get_pagination_parameters</code></li>
<li><code>get_filter_parameters</code></li>
<li><code>get_request_body</code></li>
<li><code>get_responses</code></li>
<li><code>get_serializer</code></li>
<li><code>get_paginator</code></li>
<li><code>map_serializer</code></li>
<li><code>map_field</code></li>
<li><code>map_choice_field</code></li>
<li><code>map_field_validators</code></li>
<li><code>allows_filters</code>.</li>
</ul>
<p>See <a href="https://www.django-rest-framework.org/api-guide/schemas/#per-view-customization">the schema docs</a>
for details on using custom <code>AutoSchema</code> subclasses.</p>
<h2 id="support-for-jsonfield">Support for JSONField.<a class="headerlink" href="#support-for-jsonfield" title="Permanent link">&para;</a></h2>
<p>Django 3.1 deprecated the existing <code>django.contrib.postgres.fields.JSONField</code>
in favor of a new database-agnositic <code>JSONField</code>.</p>
<p>REST framework 3.12 now supports this new model field, and <code>ModelSerializer</code>
classes will correctly map the model field.</p>
<h2 id="searchfilter-improvements">SearchFilter improvements<a class="headerlink" href="#searchfilter-improvements" title="Permanent link">&para;</a></h2>
<p>There are a couple of significant improvements to the <code>SearchFilter</code> class.</p>
<h3 id="nested-searches-against-jsonfield-and-hstorefield">Nested searches against JSONField and HStoreField<a class="headerlink" href="#nested-searches-against-jsonfield-and-hstorefield" title="Permanent link">&para;</a></h3>
<p>The class now supports nested search within <code>JSONField</code> and <code>HStoreField</code>, using
the double underscore notation for traversing which element of the field the
search should apply to.</p>
<div class="language-python highlight"><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">SitesSearchView</span><span class="p">(</span><span class="n">generics</span><span class="o">.</span><span class="n">ListAPIView</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An API view to return a list of archaeological sites, optionally filtered</span>
<span class="sd"> by a search against the site name or location. (Location searches are</span>
<span class="sd"> matched against the region and country names.)</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">queryset</span> <span class="o">=</span> <span class="n">Sites</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">all</span><span class="p">()</span>
<span class="n">serializer_class</span> <span class="o">=</span> <span class="n">SitesSerializer</span>
<span class="n">filter_backends</span> <span class="o">=</span> <span class="p">[</span><span class="n">filters</span><span class="o">.</span><span class="n">SearchFilter</span><span class="p">]</span>
<span class="n">search_fields</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;site_name&quot;</span><span class="p">,</span> <span class="s2">&quot;location__region&quot;</span><span class="p">,</span> <span class="s2">&quot;location__country&quot;</span><span class="p">]</span>
</code></pre></div>
<h3 id="searches-against-annotate-fields">Searches against annotate fields<a class="headerlink" href="#searches-against-annotate-fields" title="Permanent link">&para;</a></h3>
<p>Django allows querysets to create additional virtual fields, using the <code>.annotate</code>
method. We now support searching against annotate fields.</p>
<div class="language-python highlight"><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">PublisherSearchView</span><span class="p">(</span><span class="n">generics</span><span class="o">.</span><span class="n">ListAPIView</span><span class="p">):</span>
<span class="w"> </span><span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Search for publishers, optionally filtering the search against the average</span>
<span class="sd"> rating of all their books.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="n">queryset</span> <span class="o">=</span> <span class="n">Publisher</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">annotate</span><span class="p">(</span><span class="n">avg_rating</span><span class="o">=</span><span class="n">Avg</span><span class="p">(</span><span class="s2">&quot;book__rating&quot;</span><span class="p">))</span>
<span class="n">serializer_class</span> <span class="o">=</span> <span class="n">PublisherSerializer</span>
<span class="n">filter_backends</span> <span class="o">=</span> <span class="p">[</span><span class="n">filters</span><span class="o">.</span><span class="n">SearchFilter</span><span class="p">]</span>
<span class="n">search_fields</span> <span class="o">=</span> <span class="p">[</span><span class="s2">&quot;avg_rating&quot;</span><span class="p">]</span>
</code></pre></div>
<hr />
<h2 id="deprecations">Deprecations<a class="headerlink" href="#deprecations" title="Permanent link">&para;</a></h2>
<h3 id="serializersnullbooleanfield"><code>serializers.NullBooleanField</code><a class="headerlink" href="#serializersnullbooleanfield" title="Permanent link">&para;</a></h3>
<p><code>serializers.NullBooleanField</code> is now pending deprecation, and will be removed in 3.14.</p>
<p>Instead use <code>serializers.BooleanField</code> field and set <code>allow_null=True</code> which does the same thing.</p>
<hr />
<h2 id="funding">Funding<a class="headerlink" href="#funding" title="Permanent link">&para;</a></h2>
<p>REST framework is a <em>collaboratively funded project</em>. If you use
REST framework commercially we strongly encourage you to invest in its
continued development by <strong><a href="https://opencollective.com/django-rest-framework">signing up for a paid plan</a></strong>.</p>
<p><em>Every single sign-up helps us make REST framework long-term financially sustainable.</em></p>
<ul class="premium-promo promo">
<li><a href="https://getsentry.com/welcome/" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/sentry130.png)">Sentry</a></li>
<li><a href="https://getstream.io/try-the-api/?utm_source=drf&utm_medium=banner&utm_campaign=drf" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/stream-130.png)">Stream</a></li>
<li><a href="https://software.esg-usa.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/esg-new-logo.png)">ESG</a></li>
<li><a href="https://rollbar.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/rollbar2.png)">Rollbar</a></li>
<li><a href="https://cadre.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/cadre.png)">Cadre</a></li>
<li><a href="https://hubs.ly/H0f30Lf0" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/kloudless-plus-text.png)">Kloudless</a></li>
<li><a href="https://lightsonsoftware.com" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/lightson-dark.png)">Lights On Software</a></li>
<li><a href="https://retool.com/?utm_source=djangorest&utm_medium=sponsorship" style="background-image: url(https://fund-rest-framework.s3.amazonaws.com/retool-sidebar.png)">Retool</a></li>
</ul>
<div style="clear: both; padding-bottom: 20px;"></div>
<p><em>Many thanks to all our <a href="https://fund.django-rest-framework.org/topics/funding/#our-sponsors">wonderful sponsors</a>, and in particular to our premium backers, <a href="https://getsentry.com/welcome/">Sentry</a>, <a href="https://getstream.io/?utm_source=drf&amp;utm_medium=banner&amp;utm_campaign=drf">Stream</a>, <a href="https://software.esg-usa.com/">ESG</a>, <a href="https://rollbar.com/?utm_source=django&amp;utm_medium=sponsorship&amp;utm_campaign=freetrial">Rollbar</a>, <a href="https://cadre.com">Cadre</a>, <a href="https://hubs.ly/H0f30Lf0">Kloudless</a>, <a href="https://lightsonsoftware.com">Lights On Software</a>, and <a href="https://retool.com/?utm_source=djangorest&amp;utm_medium=sponsorship">Retool</a>.</em></p>
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