(Quick Reference)

10.6 Applying Validation to Other Classes - Reference Documentation

Authors: Graeme Rocher, Peter Ledbrook, Marc Palmer, Jeff Brown, Luke Daley, Burt Beckwith, Lari Hotari

Version: 2.3.8

10.6 Applying Validation to Other Classes

Domain classes and command objects support validation by default. Other classes may be made validateable by defining the static constraints property in the class (as described above) and then telling the framework about them. It is important that the application register the validateable classes with the framework. Simply defining the constraints property is not sufficient.

The Validateable Annotation

Classes which define the static constraints property and are annotated with @Validateable can be made validateable by the framework. Consider this example:

// src/groovy/com/mycompany/myapp/User.groovy
package com.mycompany.myapp

import grails.validation.Validateable

@Validateable class User { ...

static constraints = { login size: 5..15, blank: false, unique: true password size: 5..15, blank: false email email: true, blank: false age min: 18 } }

Registering Validateable Classes

If a class is not marked with Validateable, it may still be made validateable by the framework. The steps required to do this are to define the static constraints property in the class (as described above) and then telling the framework about the class by assigning a value to the grails.validateable.classes property in Config.groovy@:

grails.validateable.classes = [com.mycompany.myapp.User, com.mycompany.dto.Account]