GRAILS - Assigned id for domains

GRAILS - Assigned id for domains.md

If you have a Domain class with an assigned id (not the default autoincremented long), the id assignment must not be in the constructor, but in a different line.

That means, having this domain:

class State implements Serializable {
    String id
    static mapping = {
    	id column: 'id', generator: 'assigned'
    }
}

This line doesn't work:

def am = new State(id: 'AM', name: 'Amazonas').save()

But although they seem the same, these three do work:

def am = new State(name: 'Amazonas')
am.id = 'AM'
am.save()

Here are some explanations from the Grails team:

• http://stackoverflow.com/questions/7919634/my-own-id-in-gorm
• https://jira.grails.org/browse/GRAILS-1984

Stumbled upon this and just wanted to let anyone else who might do the same know that this was fixed with the bindable constraint.