[melbourne-pug] Django: Automatically creating default groups and assigning default permissions

[Mike Dewhirst]

On 6/09/2017 3:43 PM, Brian May wrote:
>
> Hello,
>
> Just wondering how to create groups automatically in Django and 
> automatically assign permissions?
>
> Sounds easy. I have created a database migration to do just this.
>
> The problem is under Django the permissions are not created until 
> after all the migrations are finished. So the resultant migration 
> works fine on my development box, but fails badly on new installs, 
> including tests.
>

Can you separate the process into separate migrations? Each can have a 
dependency on the one prior.

> Looking at slashdot, I see questions like 
> https://stackoverflow.com/questions/42743825/how-to-create-groups-and-assign-permission-during-project-setup-in-django which 
> recommend setting up a post_migrate signal handler. Unfortunately, 
> signal handlers in Django are unordered, there is no guarantee our 
> handler will be called after the one that creates the permissions.
>
> I could also have some sort of button in Django Admin that needs to be 
> manually pressed - would happen after permissions are created. Seems 
> to me though that doing significant changes to the database group 
> table from a HTTP request may not be ideal...
>
> Any other suggestions? I am somewhat surprised that this situation 
> doesn't seem to have any good answers.
>
> Regards
>
>
>
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