allow to define a transformation on the production order line

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@3962 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/TransformationRule.py

@@ -269,8 +269,12 @@ class TransformationRule(Rule):
         production_order_line = production_order_movement
       else:
         production_order_line = production_order_movement.getParent()
-      transformation = production_order_line.getSpecialiseValue(
-                         portal_type=self.getPortalTransformationTypeList())
+      line_transformation = production_order_line.objectValues(portal_type=self.getPortalTransformationTypeList())
+      if len(line_transformation)==1:
+        transformation = line_transformation[0]
+      else:
+        transformation = production_order_line.getSpecialiseValue(
+                           portal_type=self.getPortalTransformationTypeList())
       # Generate the fake context 
       tmp_context = parent_movement.asContext(
                    context=parent_movement,