How to filter model results for multiple values for a many to many field in django

I have the following Model:

class Group(models.Model):
member = models.ManyToManyField(Player, through='GroupMember')
name = models.CharField(max_length=20, unique=True)
join_password = models.CharField(max_length=20)
date_created = datetime.datetime.now()

def __unicode__(self):
return str(self.name)

class GroupMember(models.Model):
member = models.ForeignKey(Player)
group = models.ForeignKey(Group)
rating = models.IntegerField(default=1500)
played = models.IntegerField(default=0)
wins = models.IntegerField(default=0)
losses = models.IntegerField(default=0)
experience = models.IntegerField(default=0)
admin = models.BooleanField(default=0)

As you can see the group is made up of members who are players. What I would like to do is given two players I would like to be able to filter the groups that contain both of these players but I am unsure how to do this type of query.

The easiest solution for you will be:

p1 = Player.objects.get(id=1)
p2 = Player.objects.get(id=2)
groups = Group.objects.filter(member=p1).filter(member=p2)

Note that you can't use the __in filter like this because this will result in an OR and return groups that don't contain both players:

Group.objects.filter(member__in=[1, 2])

If your `Player` model looks like this:

class Player(models.Model):
name = models.CharField(max_length=200)

Then, you can execute this query:

Group.objects.filter(player__name__in=['Player1','Player2'])

Which roughly translates to _"find all groups that have players whose names match 'Player1' and 'Player2'"_

Or you can fetch the `player` objects individually:

p1 = Player.objects.get(name='Player1')
p2 = Player.objects.get(name='Player2')
groups = Group.objects.filter(player=p1).filter(player=p2)

For me `__in` did not work. I ended up using the [complex Q lookup][1]
which works perfectly and you can `or` filter conditions with. Use it like this:

from django.db.models import Q

p1 = Player.objects.get(name='Player1')
p2 = Player.objects.get(name='Player2')
querySet = Group.objects.filter(Q(member=p1) | Q(member=p2))

[1]:

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