RecursionError possible with .only on RBAC assignment models

[AlanCoding]

Bug Summary

Steps to reproduce

Run bootstrap script.

Go into python manage.py shell_plus.

RoleUserAssignment.objects.only('object_id')

Expected behavior

Gives a list of object_ids, similar to the normal query

RoleUserAssignment.objects.all()

Actual Results

RecursionError: maximum recursion depth exceeded

Cycle is somehow related to:

File ~/repos/awx/testing/django-ansible-base/ansible_base/rbac/models.py:392, in AssignmentBase.__init__(self, *args, **kwargs)
    389 super().__init__(*args, **kwargs)
    391 # Cache fields from the associated object_role
--> 392 if self.object_role_id and not self.object_id:
    393     self.object_id = self.object_role.object_id
    394     self.content_type_id = self.object_role.content_type_id