Multiple domain class binding in Grails controller action

Question

Using grails 2.3.7. I am trying to use Grails controller action parameter binding. If I have this code:

class TestController {
    def test(MyClass1 myClass1) {
        log.debug(myClass1)
    }
}

myClass1 is correctly fetched from DB using http://locahost:8080/myapp/test/test/1. But now I want to pass two domain classes. I have tried this code:

class TestController {
    def test(@RequestParameter('obj1') MyClass1 myClass1, 
             @RequestParameter('obj2') MyClass2 myclass2) {

        log.debug(myClass1)
        log.debug(myClass2)
    }
}

And access using http://localhost:8080/myapp/test/test?obj1.id=1&obj2.id=3, nothing is fetched. Is this the right way to use data binding in controller actions? Or is this impossible?

Regards and thanks in advance.

Daniel Adenew Daniel Adenew · Accepted Answer · 2014-03-28T12:50:05

You can use this and one of in your controller :

// binds request parameters to a target object
    bindData(target, params)
    // exclude firstName and lastName
    bindData(target, params, [exclude: ['firstName', 'lastName']])

    // only use parameters starting with "author." e.g. author.email
    bindData(target, params, "author")
    bindData(target, params, [exclude: ['firstName', 'lastName']], "author")

    // using inclusive map
    bindData(target, params, [include: ['firstName', 'lastName']], "author")

def User bindUser(params)  {
        def User user = new User()
        def Human human = new Human() 

           bindData(user, params["user"])
           bindData(human, params["humna"])
         if(!human) 
         human.save(failOnError:true) 
         if(!user)
         user.save(failOnError:true)
        }
         //alloha~
    }

Multiple domain class binding in Grails controller action

1 Answers