Grails difficultly in using Hibernate OneToMany model

问题

In my new project I am trying to use Hibernate model class, here one user domain class having OneToMany relation userProfile like

class User {
    //Some fields and getter setter

    //Problematic thing
    @javax.persistence.OneToMany(mappedBy = "User")
    private Set<UserProfile> userProfiles;

    //getter is like
    public Set<userProfile> getProfile() {
       // the logic
    }
    public void setProfile() {
       // the logic
    }

}

So when I try to access this field in grails criteria like

def criteria = User.createCriteria()
    List<User> userList = criteria.list() {
        userProfiles {
            eq("id",1 as long)
        }
    }

I getting the error like No signature of method: UserService.userProfiles(). I think it might be because of different getter and setter name, 'cause for remaining OneToMany fields the criteria is working fine.

Is there any possible and standard way to address this issue.

回答1:

This is a more common thing to do:

class User {
    static hasMany = [userProfiles: UserProfile]
}

Methods like getUserProfiles(), setUserProfiles(), addToUserProfiles(UserProfile p) etc. are automatically generated. See http://grails.org/doc/latest/ref/Domain%20Classes/hasMany.html.

Then you could do something like this:

def userList = User.withCriteria {
    userProfiles {
        idEq 1
    }
}

I hope that helps.

来源：https://stackoverflow.com/questions/25812376/grails-difficultly-in-using-hibernate-onetomany-model