the class needs to be unghosted for that method to return meaningful results

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42872 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/dynamic/lazy_class.py

@@ -131,6 +131,7 @@ class PortalTypeMetaClass(GhostBaseMetaClass):
 
     @see Products.ERP5Type.Base.Base._propertyMap
     """
+    cls.loadClass()
     property_list = []
     for klass in cls.mro():
       if klass.__module__ == 'erp5.accessor_holder':