treat as the property is None if parent delivery is missing.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35318 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/ParentDeliveryPropertyMovementGroup.py

@@ -68,8 +68,7 @@ class ParentDeliveryPropertyMovementGroup(PropertyMovementGroup):
   def _getParentDelivery(self, movement):
     # try to find local payment conditions from the upper level delivery
     rule = movement.getParentValue()
-    movement = rule.getParentValue()
-    delivery = movement.getDeliveryValue()
+    delivery = None
     while delivery is None and not(rule.isRootAppliedRule()):
       rule = movement.getParentValue()
       movement = rule.getParentValue()
@@ -77,6 +76,8 @@ class ParentDeliveryPropertyMovementGroup(PropertyMovementGroup):
     return delivery
 
   def _getProperty(self, document, property_id):
+    if document is None:
+      return None
     # XXX here we don't use Base.getProperty() but try to call accessor
     # directly to make acquired property
     # (eg. payment_condition_efficiency) working.