Add a context object parameter for evaluating a tales expression.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@8381 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Accessor/Base.py

@@ -132,18 +132,25 @@ class Getter(Method):
       self._storage_id = storage_id
       self._is_tales_type = (property_type == 'tales')
 
-    def __call__(self, instance, *args, **kw):
+    def __call__(self, instance, object=None, *args, **kw):
       if len(args) > 0:
         default = args[0]
       else:
         default = self._default
-      value = getattr(aq_base(instance), self._storage_id, None) # No acquisition on properties
+      # No acquisition on properties
+      value = getattr(aq_base(instance), self._storage_id, None) 
       if value is not None:
         if self._is_tales_type and kw.get('evaluate', 1):
+          if object is not None:
+            return evaluateTales(object, value)
+          else:
             return evaluateTales(instance, value)
         else:
           return value
       if default is not None and self._is_tales_type and kw.get('evaluate', 1):
+        if object is not None:
+          return evaluateTales(object, default)
+        else:
           return evaluateTales(instance, default)
       return default