Allow to customize error_message passed to the user

from ExternalValidator.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43238 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/Formulator/Errors.py

@@ -17,11 +17,14 @@ allow_class(FormValidationError)
 
 class ValidationError(Exception):
     
-    def __init__(self, error_key, field):
+    def __init__(self, error_key, field, error_text=None):
         Exception.__init__(self, error_key)
         self.error_key = error_key
         self.field_id = field.id
         self.field = field
+        if error_text is not None:
+          self.error_text = error_text
+        else:
           self.error_text = field.get_error_message(error_key)
 
 allow_class(ValidationError)