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<div class="section" id="formsets">
<h1>Formsets<a class="headerlink" href="#formsets" title="Permalink to this headline">ΒΆ</a></h1>
<div class="versionadded">
<p><span class="versionmodified">New in version 1.0.</span></p>
</div>
<p>Polymorphic models can be used in formsets.</p>
<p>The implementation is almost identical to the regular Django formsets.
As extra parameter, the factory needs to know how to display the child models.
Provide a list of <a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.PolymorphicFormSetChild" title="polymorphic.formsets.PolymorphicFormSetChild"><code class="xref py py-class docutils literal"><span class="pre">PolymorphicFormSetChild</span></code></a> objects for this.</p>
<div class="highlight-python"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">polymorphic.formsets</span> <span class="kn">import</span> <span class="n">polymorphic_modelformset_factory</span><span class="p">,</span> <span class="n">PolymorphicFormSetChild</span>
<span class="n">ModelAFormSet</span> <span class="o">=</span> <span class="n">polymorphic_modelformset_factory</span><span class="p">(</span><span class="n">ModelA</span><span class="p">,</span> <span class="n">formset_children</span><span class="o">=</span><span class="p">(</span>
<span class="n">PolymorphicFormSetChild</span><span class="p">(</span><span class="n">ModelB</span><span class="p">),</span>
<span class="n">PolymorphicFormSetChild</span><span class="p">(</span><span class="n">ModelC</span><span class="p">),</span>
<span class="p">))</span>
</pre></div>
</div>
<p>The formset can be used just like all other formsets:</p>
<div class="highlight-python"><div class="highlight"><pre><span></span><span class="k">if</span> <span class="n">request</span><span class="o">.</span><span class="n">method</span> <span class="o">==</span> <span class="s2">"POST"</span><span class="p">:</span>
<span class="n">formset</span> <span class="o">=</span> <span class="n">ModelAFormSet</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span> <span class="n">request</span><span class="o">.</span><span class="n">FILES</span><span class="p">,</span> <span class="n">queryset</span><span class="o">=</span><span class="n">ModelA</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="k">if</span> <span class="n">formset</span><span class="o">.</span><span class="n">is_valid</span><span class="p">():</span>
<span class="n">formset</span><span class="o">.</span><span class="n">save</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">formset</span> <span class="o">=</span> <span class="n">ModelAFormSet</span><span class="p">(</span><span class="n">queryset</span><span class="o">=</span><span class="n">ModelA</span><span class="o">.</span><span class="n">objects</span><span class="o">.</span><span class="n">all</span><span class="p">())</span>
</pre></div>
</div>
<p>Like standard Django formsets, there are 3 factory methods available:</p>
<ul class="simple">
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.polymorphic_modelformset_factory" title="polymorphic.formsets.polymorphic_modelformset_factory"><code class="xref py py-func docutils literal"><span class="pre">polymorphic_modelformset_factory()</span></code></a> - create a regular model formset.</li>
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.polymorphic_inlineformset_factory" title="polymorphic.formsets.polymorphic_inlineformset_factory"><code class="xref py py-func docutils literal"><span class="pre">polymorphic_inlineformset_factory()</span></code></a> - create a inline model formset.</li>
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.generic_polymorphic_inlineformset_factory" title="polymorphic.formsets.generic_polymorphic_inlineformset_factory"><code class="xref py py-func docutils literal"><span class="pre">generic_polymorphic_inlineformset_factory()</span></code></a> - create an inline formset for a generic foreign key.</li>
</ul>
<p>Each one uses a different base class:</p>
<ul class="simple">
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.BasePolymorphicModelFormSet" title="polymorphic.formsets.BasePolymorphicModelFormSet"><code class="xref py py-class docutils literal"><span class="pre">BasePolymorphicModelFormSet</span></code></a></li>
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.BasePolymorphicInlineFormSet" title="polymorphic.formsets.BasePolymorphicInlineFormSet"><code class="xref py py-class docutils literal"><span class="pre">BasePolymorphicInlineFormSet</span></code></a></li>
<li><a class="reference internal" href="api/polymorphic.formsets.html#polymorphic.formsets.BaseGenericPolymorphicInlineFormSet" title="polymorphic.formsets.BaseGenericPolymorphicInlineFormSet"><code class="xref py py-class docutils literal"><span class="pre">BaseGenericPolymorphicInlineFormSet</span></code></a></li>
</ul>
<p>When needed, the base class can be overwritten and provided to the factory via the <code class="docutils literal"><span class="pre">formset</span></code> parameter.</p>
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