Hibernate 将主键休眠为外键

我想将引用另一个实体的列作为ID。我有

Currency

类和

AuditSystem

类

Currency

具有简单的字符串ID，

AuditSystem

的ID应该是

Currency

类型的对象。我在玩@IdClass，并使我的类实现了可序列化，但我不知道如何使它工作，因为我仍然会出错。 我相信这是一个微不足道的问题，但真的想不出什么

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "audit_system")
public class AuditSystem implements Serializable {

    @Id
    private Currency currency;
    private Float audit;
    private Timestamp created;
}

---

如何正确映射这些实体？

我的建议是，您仍然需要在AuditSystem中有自己的@Id字段。并在这两个实体之间创建关系。像这样的

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "audit_system")
public class AuditSystem implements Serializable {

    @Id
    private String code;

    @OneToOne
    @PrimaryKeyJoinColumn
    private Currency currency;

    private Float audit;
    private Timestamp created;
}


@Data
@NoArgsConstructor
@Entity
@Table(name = "currencies")
public class Currency implements Serializable {

    @Id
    private String code;

    @OneToOne(mappedBy="currency")
    private AuditSystem auditSystem;

    private String name;
    private String icon;
    private Timestamp created = Timestamp.from(Instant.now());
}

@当主键也是外键时，PrimaryKeyJoinColumn应该有帮助

---

审计系统和货币之间的关系是什么？多对一？@Mara一对一我已将@PrimaryKeyJoinColumn（name=“currency”，referencedColumnName=“code”）添加到AuditSystem，现在我从Hibernate获得SerializationException。

@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@Table(name = "audit_system")
public class AuditSystem implements Serializable {

    @Id
    private String code;

    @OneToOne
    @PrimaryKeyJoinColumn
    private Currency currency;

    private Float audit;
    private Timestamp created;
}


@Data
@NoArgsConstructor
@Entity
@Table(name = "currencies")
public class Currency implements Serializable {

    @Id
    private String code;

    @OneToOne(mappedBy="currency")
    private AuditSystem auditSystem;

    private String name;
    private String icon;
    private Timestamp created = Timestamp.from(Instant.now());
}