title: Django Admin Custom Url Path
body: <p>Hi I would like to create a custom url in my django admin.</p>
  
  <p>The default URL when editing an object is.</p>
  
  <pre><code>http://localhost:8000/admin/cart/cart_id/change
  In my admin
  http://localhost:8000/admin/cart/1/change
  </code></pre>
  
  <p>I have a field called cart unique id. I want to create a custom url that behaves similar to the edit URL in django admin.</p>
  
  <pre><code>http://localhost:8000/admin/cart/uniq_id/change
  http://localhost:8000/admin/cart/H2KPAT/change
  </code></pre>
  
  <p>Is this implemation possible?</p>