Ticket #5335: form_error_append.diff

docs/newforms.txt

@@ -1387 +1387 @@
       "field" (called ``__all__``, which you can access via the
       ``non_field_errors()`` method if you need to.
 
+
+      Instead of raising an ValidationError inside ``Form.clean()``,
+      you can add an error message with
+      ``self.errors.append(fieldname, message)``. This way the error message
+      will be displayed near the given field.
+
 These methods are run in the order given above, one field at a time.  That is,
 for each field in the form (in the order they are declared in the form
 definition), the ``Field.clean()`` method (or it's override) is run, then

django/newforms/util.py

@@ -26 +26 @@
     def as_text(self):
         return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u'  * %s' % smart_unicode(i) for i in v])) for k, v in self.items()])
 
+    def append(self, name, message):
+        errorlist=self.get(name)
+        if errorlist==None:
+            errorlist=ErrorList()
+            self[name]=errorlist
+        errorlist.append(message)
+            
 class ErrorList(list, StrAndUnicode):
     """
     A collection of errors that knows how to display itself in various formats.