From 43c52d64e7027a547c44bbbe29866699f4c8a1c6 Mon Sep 17 00:00:00 2001
From: Roberto Rosario <Roberto.Rosario.Gonzalez@gmail.com>
Date: Tue, 3 Jan 2012 02:26:29 -0400
Subject: [PATCH] Add empty object_list support to the
 'filter_objects_by_access' manager method

---
 apps/acls/models.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/apps/acls/models.py b/apps/acls/models.py
index c39a37709e..bb9692a54b 100644
--- a/apps/acls/models.py
+++ b/apps/acls/models.py
@@ -274,6 +274,14 @@ class AccessEntryManager(models.Manager):
             if actor.is_superuser or actor.is_staff:
                 return object_list
         
+        try:
+            if object_list.count() == 0:
+                return object_list
+        except TypeError:
+            # object_list is not a queryset
+            if len(object_list) == 0:
+                return object_list
+        
         try:
             # Try to process as a QuerySet
             qs = object_list.filter(pk__in=[obj.pk for obj in self.get_allowed_class_objects(permission, actor, object_list[0])])