Tastypie: model and resource for Player

gistfile1.py

class Player(models.Model):
    name = models.CharField(primary_key=True, max_length=50)

    date_added = models.DateTimeField('date added', default=datetime.now())
    rating = models.IntegerField(default=1600)

    @property
    def wins(self): 
        return self.winner_games.all()

    @property
    def num_wins(self):    
        return self.winner_games.count()

    @property
    def losses(self): 
        return self.loser_games.all()

    @property
    def num_losses(self): 
        return self.loser_games.count()

    def __unicode__(self):
        return self.name



class PlayerResource(ModelResource):
    class Meta:
        queryset = Player.objects.all()
        resource_name = 'player'
        authorization = Authorization()