Faster Way (thks to romain and jerome)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22720 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Extensions/InventoryBrain.py

@@ -298,13 +298,11 @@ class TrackingListBrain(InventoryListBrain):
     # the brain is accessed from the Shared.DC.ZRDB.Results.Results instance
     obj = self.getObject()
     if obj is not None:
-      movement_list = obj.getAggregateRelatedValueList()
-      for movement in movement_list:
+      movement = obj.portal_catalog.getObject(self.delivery_uid)
       date = movement.getStartDate() or movement.getStopDate()
       if date is not None:
         timezone = date.timezone()
         self.date = self.date.toZone(timezone)
-          break
 
 class DeliveryListBrain(InventoryListBrain):
   """