Question

I have a fairly simple question about grails domain classes. I am not sure I know how to phrase it correctly since I can’t seem to find the answer on google.

I have a groovy domain class

class DomainObject {
    String name
    String email
}

and a java class that uses this domain object.

public class DomainUser {
    public void method() {
        DomainObject object = new DomainObject();
        object.getId();
    }
}

however I get an error on the line

object.getId();

with the message:

The method getId() is undefined for the type

How do I expose the id to the java class since it is auto generated by the grails application/hibernate?

Answer 1

Id field is generated at run-time and java does not know any thing about dynamic references.
Access that domain from service layer.
http://grails.org/doc/latest/guide/services.html#usingServicesFromJava

also google: “grails access service java”

first result is http://grails.1312388.n4.nabble.com/Question-How-do-I-reference-a-Grails-service-from-within-Java-class-td1462056.html

You can write some thing like this in your DomainService.groovy

class DomainService(){
    def persistAndGetNewDomain(){
       new Domain().save(flush:true)    
    }
}

Also you must add the id field to your domain class

class DomainObject {
    Long id
    String name
    String email
}