'Set group cache.'

def _get_group_cached_perms(self):

    if (not self.group):
        return {}
    perms = Permission.objects.filter(group=self.group)
    group_permissions = {}
    for perm in perms:
        group_permissions[(perm.object_id, perm.content_type_id, perm.codename, perm.approved)] = True
    return group_permissions
