Java JPA和EBean中的多对多

我试图在Play2中使用Ebian建立多对多关系，我遇到了一个问题，Ebian trows错误地说我的类未注册。 以下是我的映射类：

@Entity
public class Booking extends Model {
   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   private int id;
   //... other fields
}
@Entity
public class Store extends Model {
   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   private int id;
   //... other fields
}

@Embeddable
public class ComissionId {
   @ManyToOne(targetEntity = Booking.class, optional = false)
   @PrimaryKeyJoinColumn(name = "booking_id", referencedColumnName = "id")
   private Booking booking;

   @ManyToOne(targetEntity = Store.class, optional = false)
   @PrimaryKeyJoinColumn(name = "store_id", referencedColumnName = "id")
   private Store store;
}

@Entity
@AssociationOverrides({
    @AssociationOverride(name = "id.booking", joinColumns = @JoinColumn(name = "booking_id")),
    @AssociationOverride(name = "id.store", joinColumns = @JoinColumn(name = "store_id"))
 })
 public class StoreComission extends Model {
    @EmbeddedId
    private ComissionId id;
    @Column(nullable = false)
    private double value;
    @Column(nullable = false)
    private Date date;
}

错误：

java.lang.RuntimeException: 
  Error reading annotations for models.ids.ComissionId
  Caused by: java.lang.RuntimeException: 
  Error with association to [class models.Booking] from [models.ids.ComissionId.booking]. 
  Is class models.Booking registered?

---

在application.conf中，我放置了ebean.default=“models.*”这样所有这些类都应该注册，对吗？（我已尝试将ComissionId从package models.ids移动到models，但出现了相同的错误）

您出现此错误是因为ComissionId类中有@manytone注释。要使此代码正常工作，必须将这些关系移动到StoreCommission类。在ComissionId类中，您应该只留下标识符。在StoreCommission类中@ManyTone关系映射到与复合键中的字段相同的列。但它们的属性“insertable”和“updateable”设置为false，以防止列重复。
以下是针对上述场景更正的工作代码：

StoreCommission类别：

@Entity
public class StoreComission extends Model {

    public StoreComission() {
        id = new ComissionId();
    }

    @EmbeddedId
    private ComissionId id;

    @Column(nullable = false)
    public double value;

    @Column(nullable = false)
    public Date date;

    @ManyToOne
    @JoinColumn(name = "booking_id", insertable = false, updatable = false)
    private Booking booking;

    @ManyToOne
    @JoinColumn(name = "store_id", insertable = false, updatable = false)
    private Store store;

    public void setBooking(Booking aBooking) {
        booking = aBooking;
        id.booking_id = aBooking.id;
    }

    public Booking getBooking() {
        return booking;
    }

    public void setStore(Store aStore) {
        store = aStore;
        id.store_id = aStore.id;
    }

    public Store getStore() {
        return store;
    }
}

CommissionID类：

@Embeddable
public class ComissionId {

    public int booking_id;

    public int store_id;

    @Override
    public int hashCode() {
        return booking_id + store_id;
    }

    @Override
    public boolean equals(final Object obj) {
        return super.equals(obj);
    }
}