title: how to use SearchFilter in django-rest-framework?
body: <p>I want to do a search function with django-rest-framework<br>
  this is what I done:<br>
  <strong>views.py:</strong><br>
  I add this  :</p>
  
  <pre><code>queryset = Site.objects.all()
  serializer_class = SiteSerializer
  filter_backends = (filters.SearchFilter,)
  search_fields = ('name',)  
  </code></pre>
  
  <p>But, when I visit <code>htttp:127.0.0.1/api/v3/vgroup/?search=bob</code> it give me this error :<br>
  <a href="https://i.stack.imgur.com/sdYu5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sdYu5.png" alt="enter image description here"></a></p>