Create groups and add permissions to them in migrations

Using Django
1

Hi all,

I’d like to automatically create groups and add custom permissions and some normal permission to them.

After a lot of googling I found a solution that seems ok to me, but I don’t know if it is a good practice.
I post the link of the page, If I can’t do that, let me know and I’ll remove it:

link

First question:
In that code when the migration runs, all permissions are created before django tries to do that. Is it ok?

Second question:
If I like (for example in two months) to add a new group and assign some permission to it, I have to create a new migration and when the migration runs, all permissions are created again (it will be tried to create all the permissions again). Is it ok?

Thanks in Advance,

supermario18b

2

the code that I’m worried about, that will be executed every time (every migration), is:

# Permissions have to be created before applying them
for app_config in apps.get_app_configs():
	app_config.models_module = True
	create_permissions(app_config, verbosity=0)
	app_config.models_module = None
3

I checked the code of the “create_permission” function and it will only be tried to add a permission if not present.

perms = [
        Permission(codename=codename, name=name, content_type=ct)
        for ct, (codename, name) in searched_perms
        if (ct.pk, codename) not in all_perms
    ]
    Permission.objects.using(using).bulk_create(perms)

I tested and it seems to work just fine. If someone else needs to automatically add groups and assign permission to them, this could be a way :slight_smile: