is there a simple way to get group names of a user in django

Question

I tried following Code with the help of the django.contrib.auth.User and django.contrib.auth.Group

for g in request.user.groups:
    l.append(g.name)

But that failed and I received following Error:

TypeError at /
'ManyRelatedManager' object is not iterable
Request Method: GET
Request URL:    http://localhost:8000/
Exception Type: TypeError
Exception Value:    
'ManyRelatedManager' object is not iterable
Exception Location: C:\p4\projects\...\users.py in permission, line 55

Thanks for any help!

score 135 · Accepted Answer · edited Jul 24 '19 at 18:25

135

You can get the groups of a user with request.user.groups.all(), which will return a QuerySet. And then you can turn that object into a list if you want.

for g in request.user.groups.all():
    l.append(g.name)

or with recent Django

l = request.user.groups.values_list('name',flat = True) # QuerySet Object
l_as_list = list(l)                                     # QuerySet to `list`

edited Jul 24 '19 at 18:25

Philippe Fanaro

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answered Feb 11 '10 at 16:31

MattH

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In the second case, a QuerySet is printed on print(). The first snippet will return the expected flat list. (django 2.1.7) – cslotty Mar 01 '19 at 09:47
1

Preferred second version works perfectly fine for me on Django 2.0.13. Here it is even better as a one liner: `l = list(request.user.groups.values_list('name', flat = True))` – Akaisteph7 Mar 23 '22 at 16:36

score 37 · Answer 2 · answered Dec 26 '16 at 09:55

37

This is better

if user.groups.filter(name='groupname').exists():
    # Action if existing

else:
    # Action if not existing

answered Dec 26 '16 at 09:55

Dean Christian Armada

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the fact that is shortest was is absurd – Alexander Kleinhans May 08 '19 at 15:44

score 13 · Answer 3 · edited Jun 13 '13 at 12:39

13

user.groups.all()[0].name == "groupname"

edited Jun 13 '13 at 12:39

alecxe

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answered Jun 13 '13 at 12:21

Kishor Pawar

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1

How is this relevant to the question? – Aaron May 12 '16 at 16:28
1

True, not relevant to the current question, but it has helped others to get the group with specific name. – Kishor Pawar May 13 '16 at 09:40

score 10 · Answer 4 · answered Feb 03 '18 at 00:39

This is probably tad bit too late (I just joined stackoverflow), but for anyone googling for this in early 2018, you can use the fact that django Groups object (by default) comes with the following fields (not exhaustive , just the important ones):

id, name, permissions, user (can have many users; ManyToMany)

Note that a group can consist of many users, and a user can be a member of many groups. So you can simply filter the django Groups model for the current user-session (make sure you have added the relevant groups and assigned the user to his/her group/s):

'''
This assumes you have set up django auth properly to manage user logins
'''
# import Group models
from django.contrib.auth.models import Group

# filter the Group model for current logged in user instance
query_set = Group.objects.filter(user = request.user)

# print to console for debug/checking
for g in query_set:
    # this should print all group names for the user
    print(g.name) # or id or whatever Group field that you want to display

is there a simple way to get group names of a user in django

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