title: Polymorphism in Django
body: <p>I have the following models. How do I get access to the <strong>unicode</strong> of the inheriting tables (Team and Athete) from the Entity table? I'm trying to display a list of all the Entities that displays 'name' if Team and 'firstname' and 'lastname' if Athlete.</p>
  
  <pre><code>class Entity(models.Model):
    entity_type_list = (('T', 'Team'), ('A', 'Athlete'))
    type = models.CharField(max_length=2, choices=entity_type_list,default='P') 
    pictureurl = models.URLField('Picture Url', verify_exists=False, max_length=255, null=True, blank=True)
  
  
  class Team(Entity):
  
    name = models.CharField(max_length=100)
  
    def __unicode__(self):
      return self.name
  
  class Athlete(Entity):
  
    firstname = models.CharField(max_length=100)
    lastname = models.CharField(max_length=100)
  
    def __unicode__(self):
      return '%s %s' % (self.firstname, self.lastname)
  </code></pre>