<g:fieldError bean="${book}" field="title" />
fieldError
Purpose
Renders an error message for the given bean and field.
Examples
Description
Attributes
- 
bean(required) - The bean to check for errors - 
field(required) - The field of the bean or model reference to check - 
message(optional) -The object to resolve the message for. Objects must implement MessageSourceResolvable interface. - 
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.