InlineModelAdmin and permissions on the instances shown in the in-line

[Jonas Vacek]

​https://docs.djangoproject.com/en/4.1/ref/contrib/admin/#django.contrib.admin.InlineModelAdmin.has_change_permission

As documented above, the has_{xyz}_permission() functions are referring to the parent obj.

As far as I can tell, there's no method currently available change the permissions on each instance inside of an inline.

to help visualise what I'm aiming for, here is a screenshot with an implemented work-around that overrrides the default form of the in-line

The work-around is not perfect, as it just changes the <input> attributes on the form, and changes will not be rejected in any way, but it gives the visual idea. The above is achieved with the following

class MyInlineForm(ModelForm):
    def __init__(self, *args, **kwargs):
        super(MyInlineForm, self).__init__(*args, **kwargs)
        instance = getattr(self, "instance", None)
        if (
            instance
            and instance.id
            and (instance.my_permission_function())
        ):
            for field in self.fields:
                self.fields[field].widget.attrs["readonly"] = True

[Carlton Gibson]

Implementing the backend for object-level permissions is out-of-scope for Django itself. (See #29918 and linked discussions and PRs)

Third-party packages allow for this: django-guardian, django-rules, and others.