该类未定义IdClass外键

Question

我正在使用productid作为电话表中的外键。我不知道在PhoneRepository的id部分写什么。因为给出错误

Product.java

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Product {

@Id  @GeneratedValue(strategy = GenerationType.IDENTITY)
private long productID;
...

phone.java

@Entity
@Data
@AllArgsConstructor
@NoArgsConstructor
@IdClass(Product.class)
public class Phone implements Serializable{


private static final long serialVersionUID = 1L;

@Id
@OneToOne
@JoinColumn(name = "productID")
private Product product;
...

PhoneRepository.Java

 @Repository
 public interface PhoneRepository extends CrudRepository<Phone, Product>{  //I tried Long

  }

错误

Caused by: java.lang.IllegalArgumentException: This class [class 
com.test.project.data.entity.prod.Phone] does not define an IdClass

Answer 1

删除Product上的@IDClass批注，因为您没有自定义id提供程序。

还可以从电话上的产品中删除@id并添加phoneID,如下所示：

@Id
private long phoneID;


@OneToOne
@JoinColumn(name = "productID", referencedColumnName = "productID")
private Product product;