Fix ReferenceField dbref = False

tests/test_dereference.py

@@ -1,7 +1,7 @@
 from __future__ import with_statement
 import unittest
 
-from bson import DBRef
+from bson import DBRef, ObjectId
 
 from mongoengine import *
 from mongoengine.connection import get_db
@@ -187,8 +187,8 @@ class FieldTest(unittest.TestCase):
         self.assertEqual(group.members, [user])
 
         raw_data = Group._get_collection().find_one()
-        self.assertTrue(isinstance(raw_data['author'], basestring))
-        self.assertTrue(isinstance(raw_data['members'][0], basestring))
+        self.assertTrue(isinstance(raw_data['author'], ObjectId))
+        self.assertTrue(isinstance(raw_data['members'][0], ObjectId))
 
     def test_recursive_reference(self):
         """Ensure that ReferenceFields can reference their own documents.