Playframework表单绑定请求illegalstateexception

Question

尝试绑定表单请求时，我得到此illegalStateException没有值。我认为它与我的联系人模型有一对多映射，我不知道如何处理bindfromquestion。任何例子都会有帮助。

谢谢， 添

我的模特是：

@Entity
public class Contact extends Model {

    @Id
    public long id;     
    public String firstName;
    public String lastName; 
    public String prefix;
    public String role;
    public String organization;
    public String website;
    public Date lastModDate;

    @OneToMany(mappedBy = "contact")
    public List<Address> address;

    @OneToMany(mappedBy = "contact")
    public List<Email> email;

    @OneToMany(mappedBy = "contact")
    public List<PhoneNumber> phoneNumber;

}

控制器：

public static Result save(){
    Form<Contact> boundForm = contactForm.bindFromRequest();
    Contact contact = boundForm.get();
    contact.save();

    return ok(String.format("Saved contact %s", "contact"));

}