title: Django filter on TimeField
body: <p>In my model I have a TimeField:</p>
  
  <pre><code>time = models.TimeField(db_index=True)
  </code></pre>
  
  <p>Now I have to filter by this value:
  for example I need to make something like: <code>time == "12:30"</code></p>
  
  <p>**** EDIT *****</p>
  
  <p>I need also to make something like: time is in a range : <code>from 12:15 to 12:15</code></p>
  
  <p>How can I make it?</p>