How can I override the default error message in Grails?

Question

I have a Person object with a lastName field. The lastName field cannot be blank. When the user submits a form blank value in the lastName field, the error message that the user sees is:

Property [lastName] of class [com.example.Person] cannot be blank

This error message is lame. I want to customize it to something more user friendly, like "The Last Name field cannot be blank"

How do I do that?

Answer 1

See Chapter 7 of the docs: http://grails.org/doc/latest/

You would change grails-app/i18n/messages.properties and add

person.lastName.blank=The Last Name field cannot be blank

Answer 2

In Grails 3 you need to change in grails-app/i18n/messages.properties:

default.blank.message=The {0} field cannot be blank