Programmatically creating a group : Can't access permissions from migration

Question

After seeing this post, I tried to create my own group at project setup with this migration :

from django.db import migrations
from django.contrib.auth.model         


        

Answer 1

From this Django ticket, here's what worked for me in Django 3.0.4 and apparently will work in >=1.9:

from django.core.management.sql import emit_post_migrate_signal

def create_group(apps, schema_editor):
    # Ensure permissions and content types have been created.
    db_alias = schema_editor.connection.alias
    emit_post_migrate_signal(2, False, db_alias)
    # Now the content types and permissions should exist

    Permission = apps.get_model('auth', 'Permission')
    ...