[soc2009/model-validation] Added code param to ValidationError and use it to override validator's messages

git-svn-id: http://code.djangoproject.com/svn/django/branches/soc2009/model-validation@11035 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/exceptions.py

@@ -35,7 +35,7 @@ class FieldError(Exception):
 NON_FIELD_ERRORS = '__all__'
 class ValidationError(Exception):
     """An error while validating data."""
-    def __init__(self, message):
+    def __init__(self, message, code=None):
         import operator
         from django.utils.encoding import force_unicode
         """
@@ -49,11 +49,10 @@ class ValidationError(Exception):
         if isinstance(message, list):
             self.messages = [force_unicode(msg) for msg in message]
         else:
+            self.code = code
             message = force_unicode(message)
             self.messages = [message]
 
-
-
     def __str__(self):
         # This is needed because, without a __str__(), printing an exception
         # instance would result in this:

django/core/validators.py

@@ -20,7 +20,7 @@ email_re = re.compile(
 
 def validate_email(value):
     if not email_re.search(smart_unicode(value)):
-        raise ValidationError(_(u'Enter a valid e-mail address.'))
+        raise ValidationError(_(u'Enter a valid e-mail address.'), code='invalid')
 
 class ComplexValidator(object):
     def get_value(self, name, all_values, obj):

django/forms/fields.py

@@ -131,7 +131,10 @@ class Field(object):
                 try:
                     v(value)
                 except ValidationError, e:
-                    errors.extend(e.messages)
+                    if hasattr(e, 'code'):
+                        errors.append(self.error_messages.get(e.code, e.messages[0]))
+                    else:
+                        errors.extend(e.messages)
         if errors:
             raise ValidationError(errors)