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

Question

I have the following Model:

class Group(models.Model):
    member = models.ManyToManyField(Player, through=\'GroupMember\')
    name = models.CharField(max_l         


        

Answer 1

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)

Answer 2

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])

Answer 3

For me __in did not work. I ended up using the complex Q lookup 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))