title: Django UpdateView without pk in url
body: <p>Is it possible eliminate <code>pk</code> from url related to <code>UpdateView</code>?</p>
  
  <p>For example, if I have </p>
  
  <pre><code>url(r'^myobj/update/(?P&lt;pk&gt;\d+)/$', views.UpdateMyObj.as_view(), name="update")
  </code></pre>
  
  <p>is there any way to write it like</p>
  
  <pre><code>url(r'^myobj/update/$', views.UpdateMyObj.as_view(), name="update")
  </code></pre>
  
  <p>and then send <code>pk</code> as a parameter in <code>POST</code> or <code>GET</code> request?</p>