复合外键和主键的Hibernate / JPA映射

Question

我有3个实体，房屋，会员，宠物。 映射类为：

public class House {
    @EmbeddedId
    private HouseId houseId;
    // other fields
}

@Embeddable
public class HouseId {
    @Column(name = "district")
    private String district;
    
    @Column(name = "address_number")
    private String addressNumber;
}

public class Member {
    @MemberId
    private MemberId id;
    
    @OneToMany(mappedBy = "member")
    private List<Pet> pets;
    //other fields
}

@Embeddable
public class MemberId {
    private HouseId houseId;
    @Column(name = "member_id")
    private String memberId; 
}

public class Pet {
    @EmbeddedId
    private PetId id;
    
    @ManyToOne
    //put necessary annotations here
    private Member member;
}

@Embeddable
public class PetId {
    private HouseId houseId;
    @Column(name = "pet_id")
    private String petId;
}

总结：

• 宠物具有主键（区，address_number，pet_id）。
• 成员具有主键（区，address_number，member_id）。
• 宠物具有成员的外键（区，address_number，member_id）。 因此，如何在Pet类中放置必要的注释，以显示Pet与Member之间的关系。