title: Django Admin, Show Aggregate Values From Related Model
body: <p>Is it possible, within a single Django admin model, to aggregate fields from related objects. </p>
  
  <p>For example, I have a Student Object that has a FK to a Test Object.  The test object has a "score" field. </p>
  
  <p>Can I aggregate the scores across all Student's Tests and place it in the admin display_list attribute?</p>