class FriendGroup(models.Model):
    name = models.CharField(max_length=100)
    friends = models.ManyToManyField(User)
    admin = models.ForeignKey(User, on_delete=models.CASCADE, related_name="admin_model")


class Collection(models.Model):
    name = models.CharField(max_length=100, default="")
    admin = models.ForeignKey(User, on_delete=models.CASCADE)
    group = models.ForeignKey(FriendGroup, on_delete=models.CASCADE)