Support BEFORE hooks

[maps82]

Hello!

I noticed that only the AFTER_* hooks of django-lifecycle are implemented.

Wouldn't it be useful to also support the BEFORE_* hooks?

E.g. I have an attachment file model. If an object get's deleted I'd like to use a BEFORE_DELETE hook to also delete the related file in the filesystem. With OperationType.DELETE this is not possible as the object is removed and I can't access it's fields in the hook anymore.

[github-actions]

Thanks for reporting this issue.

[maps82]

Sorry, I was wrong with my assumption. It's just the pk that is None. So no problem for my use case...

[jackton1]

Yeah correct, plan to support before and after decorators but for now only the pk would be set to None

https://github.com/tj-django/django-model-subscription#create-update-delete-operations

Using

@before_delete_subscription
def (..):
    ...


@after_delete_subscription
def (..):
    ...