How do I create a custom validator with a custom error message in Grails?

Question

How do I create a custom validator in grails and make it pass a custom string back to the view and an error message?

I saw so many people getting stuck in the same p

Answer 1

The alternative to have custom validation is create custom constraint and wire it with Grails.

http://www.zorched.net/2008/01/25/build-a-custom-validator-in-grails-with-a-plugin/