Hi all,
With the new aggregates in django 1.1, I wonder if there's an easy way to
aggregate over reverse relationships. As an example, assume a simplistic
representation of a set of teams:
class Team(models.Model):
name = models.CharField(max_length=100)
class Player(moedls.Model):
name = models.CharField(max_length=100)
team = models.ForeignKey(Team)
Now, I want to perform some operation on all the empty teams -- so I want to
do something like
Team.objects.annotate(num_players=Count('player_set')).filter(num_players__eq=0)
There may be some obvious way (which I'm currently missing) to solve the
specific problem of finding the empty teams without such aggregates; however,
they do make sense in general.
Is there a way?
Thanks,
Shai.
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