title: Update object in form view without any fields in Django
body: <p>I want to create a <code>view</code> having a form, But the form should not show any fields.</p>
  
  <p>In the <code>view</code> I has to be able to confirm/accept the object and thus change the status field of the object.</p>
  
  <p>I guess I can make a simple view inheriting from FormView without creating any input fields, find the object in the dispatch method, and change the status field in the form_valid method.</p>
  
  <p>But I wondered if it's better to use <code>UpdateView</code> since it has already implemented <code>get_object</code>, etc.</p>
  
  <p>I have to use this approach many times, so I want to do it right the first time.</p>