@OneToOne与@JoinColumn的双向映射

Question

假设我有个人

class Person{
    @Id Integer id;

    @OneToOne
    @JoinColumn(name = "person_id")
    Job myJob;
}

和工作

class Job{
    @Id Integer id;
    Integer person_id;

    @OneToOne
    @PrimaryKeyJoinColumn(name = "person_id")
    Person currentWorker;
}

提取时，我无法将Person和Job映射到其他实体。
我在做什么错？

Answer 1

您的代码应为：

@Entity
public class Person implements Serializable {

    @Id Integer id;

    @OneToOne
    @JoinColumn(name = "id")
    Job myJob;
}

@Entity
public class Job implements Serializable {

    @Id Integer id;

    @OneToOne(mappedBy = "myJob")
    Person currentWorker;
}

（尝试从工作中删除重复的列’person_id’）

或其他共享主键的方法：

@Entity
public class Person {
    @Id Integer id;

    @OneToOne(cascade = CascadeType.ALL)
    @PrimaryKeyJoinColumn
    Job myJob;
}

@Entity
public class Job {
    @Id Integer id;
}