是否可以为类之间的@ManyToOne关系定义多个@EmbeddedId复合键？例如：
实体1
@Entity
@AttributeOverrides({ @AttributeOverride(name="pk.method", column=@Column(name = "http_method", nullable = false)) })
@AssociationOverrides({ @AssociationOverride(name = "pk.operation", joinColumns = @JoinColumn(name = "id_operation", nullable = false)) })
public class Action {
@EmbeddedId
private ActionId pk = new ActionId();
}
@Embeddable
private class ActionId implements Serializable {
@ManyToOne private Operation operation;
private HttpMethod method;
}
实体2：
@Entity
@AssociationOverrides
// Need to override the embedded if attributes of the Action entity inside the UserActionId class
public class UserAction {
@EmbeddedId private UserActionId pk = new UserActionId();
}
@Embeddable
private class UserActionId implements Serializable {
// How to provide a @JoinColumn for the Action.pk composite key (action.pk.authURL) and @Column for (action.pk.httpMethod)
@ManyToOne private Action action;
@ManyToOne private User user;
}
这可能吗？我已经尝试过，但仍然遇到Hibernate错误，说FK必须与ActionId pk具有相同的列数。