How to check (in template) if user belongs to a group

Question

How to check in template whether user belongs to some group?

It is possible in a view which is generating the template but what if I want

Answer 1

Watch out that you'll get an exception if the group does not exist in the DB.

The custom template tag should be:

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

register = template.Library()

@register.filter(name='has_group')
def has_group(user, group_name):
    try:
        group =  Group.objects.get(name=group_name)
    except Group.DoesNotExist:
        return False

    return group in user.groups.all()

Your template:

{% if request.user|has_group:"mygroup" %} 
    
User belongs to my group 
{% else %}
    
User doesn't belong to mygroup
{% endif %}