使用一对多双向时找不到实体未找到异常

Question

使用邮递员发布数据或运行程序时，遇到以下错误：

无法找到 id 为 1 的 com.example.entity.Product；嵌套异常是 javax.persistence.EntityNotFoundException: Unable to find com.example.entity.Product with id 1

下面是父类：

@Entity
public class Customer {
    @Id
    @GeneratedValue
    private Integer cust_Id;
    private String cust_name;
    private String city;

    @OneToMany(mappedBy = "customer")
    private List<Product> products;
}

Child class:
@Entity
public class Product {
    @Id
    private Integer pid;
    private String pname;

    @ManyToOne(fetch = FetchType.LAZY)
    @NotFound(action = NotFoundAction.IGNORE)
    @JoinColumn(name = "fk_cust_id")
    private Customer customer;
}

Answer 1

@NotFound(action=NotFoundAction.IGNORE) 导致 @ManyToOne(fetch = FetchType.LAZY) 字段的 EAGER 加载。 Refer here