Add a generic relation to any model that registers itself for ACLs.

This helps reference the ACLs of the model with using ContentType.

mayan/apps/acls/classes.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals, absolute_import
 import logging
 
 from django.apps import apps
+from django.contrib.contenttypes.fields import GenericRelation
 
 logger = logging.getLogger(__name__)
 
@@ -18,6 +19,12 @@ class ModelPermission(object):
         for permission in permissions:
             cls._registry[model].append(permission)
 
+        AccessControlList = apps.get_model(
+            app_label='acls', model_name='AccessControlList'
+        )
+
+        model.add_to_class('acls', GenericRelation(AccessControlList))
+
     @classmethod
     def get_for_instance(cls, instance):
         StoredPermission = apps.get_model(