title: permission_required decorator not working for me
body: <p>I can't figure out why the permission required decorator isn't working. I would like to allow access to a view only for staff members. I have tried</p>
  
  <pre><code>@permission_required('request.user.is_staff',login_url="../admin")
  def series_info(request):
    ...
  </code></pre>
  
  <p>and also </p>
  
  <pre><code>@permission_required('user.is_staff',login_url="../admin")
  def series_info(request):
    ...
  </code></pre>
  
  <p>As the superuser, I can access the view, but any users I create as staff can't access it and are redirected to the login url page. I tested the login_required decorator and that works fine.</p>