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django-categories/docs/registering_models.html
Corey Oordt b2dec5416f Updated the documentation!
2010-12-18 14:49:45 -05:00

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<title>Registering Models &mdash; Django Categories v0.4.8 documentation</title>
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<p>Django Categories v0.4.8 documentation</p>
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<div id="title"><h1>Registering Models</h1></div>
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<li class="toctree-l1 current"><a class="current reference internal" href="">Registering Models</a><ul>
<li class="toctree-l2"><a class="reference internal" href="#registering-a-many-to-one-relationship">Registering a many-to-one relationship</a></li>
<li class="toctree-l2"><a class="reference internal" href="#registering-a-many-to-many-relationship">Registering a many-to-many relationship</a></li>
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<div class="section" id="registering-models">
<h1>Registering Models<a class="headerlink" href="#registering-models" title="Permalink to this headline"></a></h1>
<div class="section" id="registering-a-many-to-one-relationship">
<h2>Registering a many-to-one relationship<a class="headerlink" href="#registering-a-many-to-one-relationship" title="Permalink to this headline"></a></h2>
<p>To create a many-to-one relationship (foreign key) between a model and Django Categories, you register your model with the <tt class="docutils literal"><span class="pre">register_fk</span></tt> function.</p>
<dl class="function">
<dt id="register_fk">
<tt class="descname">register_fk</tt><big>(</big><em>model, field_name='category', extra_params={}]</em><big>)</big><a class="headerlink" href="#register_fk" title="Permalink to this definition"></a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>model</strong> &#8211; The Django Model to link to Django Categories</li>
<li><strong>field_name</strong> &#8211; Optional name for the field <strong>default:</strong> category</li>
<li><strong>extra_params</strong> &#8211; Optional dictionary of extra parameters passed to the <tt class="docutils literal"><span class="pre">ForeignKey</span></tt> class.</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<p>Example, in your <tt class="docutils literal"><span class="pre">models.py</span></tt>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">categories</span>
<span class="n">categories</span><span class="o">.</span><span class="n">register_fk</span><span class="p">(</span><span class="n">MyModel</span><span class="p">)</span>
</pre></div>
</div>
<p>If you want more than one field on a model you have to have some extra arguments:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">categories</span>
<span class="n">categories</span><span class="o">.</span><span class="n">register_fk</span><span class="p">(</span><span class="n">MyModel</span><span class="p">,</span> <span class="s">&#39;primary_category&#39;</span><span class="p">)</span>
<span class="n">categories</span><span class="o">.</span><span class="n">register_fk</span><span class="p">(</span><span class="n">MyModel</span><span class="p">,</span> <span class="s">&#39;secondary_category&#39;</span><span class="p">,</span> <span class="p">{</span><span class="s">&#39;related_name&#39;</span><span class="p">:</span><span class="s">&#39;mymodel_sec_cat&#39;</span><span class="p">})</span>
</pre></div>
</div>
<p>The <tt class="docutils literal"><span class="pre">extra_args</span></tt> allows you to specify the related_name of one of the fields so it doesn&#8217;t clash.</p>
</div>
<div class="section" id="registering-a-many-to-many-relationship">
<h2>Registering a many-to-many relationship<a class="headerlink" href="#registering-a-many-to-many-relationship" title="Permalink to this headline"></a></h2>
<p>To create a many-to-many relationship between a model and Django Categories, you register your model with the <tt class="docutils literal"><span class="pre">register_m2m</span></tt> function.</p>
<dl class="function">
<dt id="register_m2m">
<tt class="descname">register_m2m</tt><big>(</big><em>model, field_name='categories', extra_params={}]</em><big>)</big><a class="headerlink" href="#register_m2m" title="Permalink to this definition"></a></dt>
<dd><table class="docutils field-list" frame="void" rules="none">
<col class="field-name" />
<col class="field-body" />
<tbody valign="top">
<tr class="field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
<li><strong>model</strong> &#8211; The Django Model to link to Django Categories</li>
<li><strong>field_name</strong> &#8211; Optional name for the field <strong>default:</strong> categories</li>
<li><strong>extra_params</strong> &#8211; Optional dictionary of extra parameters passed to the <tt class="docutils literal"><span class="pre">ManyToManyField</span></tt> class.</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd></dl>
<p>Example, in your <tt class="docutils literal"><span class="pre">models.py</span></tt>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">categories</span>
<span class="n">categories</span><span class="o">.</span><span class="n">register_m2m</span><span class="p">(</span><span class="n">MyModel</span><span class="p">)</span>
</pre></div>
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Registering Models
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