Custom django template filter to check if user is in allowed groups

custom_filter_user_in_group.py

from django import template
from django.contrib.auth import get_user_model
from django.contrib.auth.models import Group

register = template.Library()
User = get_user_model()

@register.filter(name="user_in_group")
def user_is_in_group(user: User, allowed_groups: str) -> bool:
    """
    'allowed_groups' should be a comma-separated string with no spaces.
    Return if user is in one of the allowed groups
    """
    allowed_groups = allowed_groups.split(",")
    groups = Group.objects.filter(name__in=allowed_groups)
    return user.groups.filter(id__in=groups.values_list("id", flat=True)).exists()

#   Usage in template:
# {% if user|user_in_group:"Group 1,Group 2" %}