hibernate - @OneToOne 与 @JoinColumn 双向映射

Question

假设我有一个人

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;
}

获取时，我无法将人员和工作映射到其他实体。
我犯了什么错误？

Answer 1

您的代码应该是:

@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;
}  

(尝试从作业中删除重复的列“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;
}