add getRevision method, become some products monkey patch SimpleItem.Item with...

add getRevision method, become some products monkey patch SimpleItem.Item with another getRevision method



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@9343 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -3747,6 +3747,12 @@ Business Template is a set of definitions, such as skins, portal types and categ
           self.workflow_history[
                             'business_template_installation_workflow'] = None
 
+    def getRevision(self):
+      """returns the revision property.
+      This is a workaround for #461.
+      """
+      return self._baseGetRevision()
+
     def updateRevisionNumber(self):
         """Increment bt revision number.
         """