Explicitly try to get Movement_getPriceCalculationOperandDict, because...

Explicitly try to get Movement_getPriceCalculationOperandDict, because Movement is used as a base class.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@15376 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Movement.py

@@ -232,6 +232,11 @@ class Movement(XMLObject, Amount):
     if context is None:
       context = self
     method = context._getTypeBasedMethod('getPriceCalculationOperandDict')
+    if method is None:
+      # Try this, because when the context is an instance of a derived
+      # class of Movement, Movement_getPriceCalculationOperandDict is
+      # not searched.
+      method = getattr(context, 'Movement_getPriceCalculationOperandDict', None)
     if method is not None:
       operand_dict = method(**kw)
       if operand_dict is None: