resolveCategory has to used just for categories.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@10357 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/ObjectMessage.py

@@ -74,9 +74,7 @@ class ObjectMessage:
      if request is not None:
        for item in request:
          if item.meta_type ==  'ERP5 Site':
-           portal = item 
-           portal_categories = getToolByName(portal, 'portal_categories')
-           return portal_categories.resolveCategory(self.object_relative_url)
+           return item.restrictedTraverse(self.object_relative_url)
 
      return None