title: Polymorphic models like rails in Django?
body: <p>In <a href="http://rubyonrails.org/" rel="nofollow">rails</a>, I can declare a model <code>:polymorphic =&gt; true</code> and that would be enough to make the model be polymorphic.</p>
  
  <p>But how can I create a polymorphic model in <a href="http://djangoproject.com/" rel="nofollow">Django</a>?</p>
  
  <p>I know it's not simple as rails but I need a introduction for doing it in <strong>Django</strong>.</p>