Question

I am building a web application in Play! 1.2.5. I have a model class where one of the attributes is a Set collection of enums:

@Entity
@Table(name="AppUser")
public class User extends Model {

    ...

    @Column(name = "industry_id")
    @ElementCollection(targetClass = Industry.class)
    @CollectionTable(name = "Industry", joinColumns = @JoinColumn(name = "AppUser_id"))
    public Set<Industry> industries = new HashSet<Industry>();

}

The enum is:

public enum Industry {
    Industry1,
    Industry2
}

How exactly can I bind the industries collection to an edit template where the industries field is represented as a list of checkboxes, and their checking or unchecking adds them or removes them from the objects collection?

Thany you

Answer 1

You can bind your checkboxes like this

#{form @save()}
<input type="checkbox" value="Industry1" name="user.industries">Industry number 1
<input type="checkbox" value="Industry2" name="user.industries">Industry number 2
<input type="checkbox" value="Industry3" name="user.industries">Industry number 3
<input type="submit" value="Submit">
#{/form}

In my case it works on a model without JPA annotations but I guess it also work in your case