Assiging Permissions not Designed for the Class

[iamMHZ]

There is a ValidationError in the BaseObjectPermission class that prevents assigning of permissions to an object that does not match the content type of the given permission.

def save(self, *args, **kwargs):
    content_type = get_content_type(self.content_object)
    if content_type != self.permission.content_type:
        raise ValidationError("Cannot persist permission not designed for "
                              "this class (permission's type is %r and object's type is %r)"
                              % (self.permission.content_type, content_type))

Also, there is an exception in the ObjectPermissionBackend class that checks the mentioned criteria.

if app_label != ctype.app_label:
    raise WrongAppError("Passed perm has app label of '%s' while "
                        "given obj has app label '%s' and given obj"
                        "content_type has app label '%s'" %
                        (app_label, obj._meta.app_label, ctype.app_label))
 

I know that it sounds awkward to assign the view_groups permission (which has the group content type ) to an instance of the School model to a user. But consider the following scenario:
I have an Education Academy that has some teachers and students and these teachers and students are members of some other Education Academies too. (M2M relation). I have other entities like Homework and Notification too.

So How can I say Teacher-A has permission to add Homework in School-A and Teacher-A can only Add Notifications in School-B? (we have the same thing for students too).
The Djagno/guardian of what I said is below:

from guardian.shortcuts import assign_perm

school_a = School.objects.create(name='School-A')
school_b = School.objects.create(name='School-B')
user_a = get_user_model().object.create(username='user_a')

school_a.teachers.add(user_a)
school_b.teachers.add(user_a)

assign_perm( 'add_homework',user_a, school_a)
assign_perm( 'add_notification', user_a, school_b)

# There we go,  user_a can call the API to add homework in School-A but can not add homework in School-B

What I am proposing is that the user is an entity that login to the system but that user can become a member of some other thing (like a teacher/student is a member of a school) and because of that membership has some permissions in that place(object).

Thank you in advance for any time and effort that you are putting into this issue.