How do I extend the Django Group model?

Question

Is there a way to extend the built-in Django Group object to add additional attributes similar to the way you can extend a user object? With a user object, you can do the fo

Answer 1

For me worked solution based on:

https://docs.djangoproject.com/pl/1.11/topics/auth/customizing/#extending-user

Let me explain what I did with Groups extending default model with email alias:

First of all I created my own django application let name it

python manage.py startapp auth_custom

Code section:

In auth_custom/models.py I created object CustomGroup

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

class CustomGroup(models.Model):
        """
        Overwrites original Django Group.
        """
        def __str__(self):
            return "{}".format(self.group.name)

        group = models.OneToOneField('auth.Group', unique=True)
        email_alias = models.EmailField(max_length=70, blank=True, default="")

In auth_custom/admin.py:

from django.contrib.auth.admin import GroupAdmin as BaseGroupAdmin
from django.contrib.auth.models import Group


class GroupInline(admin.StackedInline):
    model = CustomGroup
    can_delete = False
    verbose_name_plural = 'custom groups'


class GroupAdmin(BaseGroupAdmin):
    inlines = (GroupInline, )


# Re-register GroupAdmin
admin.site.unregister(Group)
admin.site.register(Group, GroupAdmin)

After making migrations I have such result in Django Admin view.

Custom Group in Django Admin

In order to access this custom field you must type:

from django.contrib.auth.models import Group


    group = Group.objects.get(name="Admins")  # example name

    email_alias = group.customgroup.email_alias

If any mistakes please notify me, I'll correct this answere.