(Quick Reference)
                fieldError
Purpose
Renders an error message for the given bean and field.
Examples
<g:fieldError bean="${book}" field="title" />Description
Attributes
- bean(required) - The bean to check for errors
- field(required) - The field of the bean or model reference to checkreferes to field of defined bean
- message(optional) -The object to resolve the message for. Objects must implement org.springframework.context.MessageSourceResolvable.
- encodeAs(optional) - The name of a codec to apply, i.e. HTML, JavaScript, URL etc.
- locale(optional) -  override locale to use instead of the one detected.
Source