在play框架中使用bean关系获取模型时的nullpointerException

Question

我需要将所有事件都连接到用户。

我创建了一个模型来处理这种关系：

@Entity
public class Affiliated extends Model{

@OneToMany
private Bruker bruker;
@OneToOne
private Event event;
@Column(nullable = false)
private Calendar alarmTime = null;

public enum Status{
    ATTENDING, MAYBE, NOT_ATTENDING, UNDECIDED
}

private Status status;

public Affiliated(){
    this.status=Status.UNDECIDED;
}

public static Finder<Event, Affiliated> find = new Model.Finder<Event, Affiliated> (
       Event.class, Affiliated.class
);

我试过这样做：

 public static Result getEvents(){
    if(Bruker.signedIn()) {
        List<models.Event> eventList = models.Event.find.where().eq("creator", Bruker.find.byId(session("User"))).findList();
        List<Affiliated> affiliatedList = models.Affiliated.find.where().eq("bruker", Bruker.find.byId(session("User"))).findList();
        for (Affiliated i : affiliatedList) {
            eventList.add(i.getEvent());
        }
        return Bruker.signedIn(ok(views.html.layoutHtml.render("MyEvents", views.html.Event.myEvents.render(eventList))));
    }
    return redirect(routes.Application.index().absoluteURL(request()));
}

但是当我尝试运行它时，它会为nullpointerException返回affiliatedList，即使返回空列表应该没有问题。

有关如何解决此错误的任何想法？

ps：＆＃34; bruker＆＃34;意味着＆＃34;用户＆＃34;用挪威语。