Question

我有两个表Users

CREATE TABLE `users` (
`id` BIGINT NOT NULL,
PRIMARY KEY (`id`))

和购物车

CREATE TABLE `carts` (
`id` BIGINT NOT NULL,
`user_id` BIGINT,
PRIMARY KEY (`id`))
ALTER TABLE `carts` ADD CONSTRAINT Cart_User_FK
FOREIGN KEY (`user_id`) REFERENCES `users` (`id`);

我为他们创建实体

@Entity
@Table(name = "users")
public class User{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "user")
    private Cart cart;
}

和

@Entity
@Table(name = "carts")
public class Cart{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;

    @OneToOne(cascade = CascadeType.ALL)
    @JoinColumn(name = "user_id")
    private User user;
}

我尝试将购物车实例设置为用户并保存用户

Cart cart = new Cart();
cartRepository.save(cart);
user.setCart(cart);
userRepository.save(user);

但休眠时不更新购物车表

从SimpleJpaRepository扩展的存储库

有人可以解释一下如何更新相关对象吗？

使用OneToOne关系进行休眠级联保存

0 个答案: