java - 使用 Hibernate 识别另一个实体中的实体的问题

Question

这是代码:

@Entity
@Table(name = "students")
public class BotUser {

    ...

    @Id
    @Column(name = "id", updatable = false)
    private int id;    

    @OneToOne
    private Equipment equipment;

    ...

}

@Entity
@Table(name = "students")
public class Equipment {

    ...

    @Id
    @Column(name = "id")
    private int id;

    ...

}

当Hibernate从PostrgeSQL表中获取设备数据时，他请求“equipment_id”字段，而不是“id”。如何解决这个问题？

Answer 1

我必须使用@JoinColumn注释。为了确保我添加了 CascadeType.ALL

@Entity
@Table(name = "students")
public class BotUser {

    ...   

    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "id")
    private Equipment equipment;

    ...

}

同样的问题:AnnotationException Referenced property not a (One|Many)ToOne