Question

我的班级结构如下：

Product.java

@Entity
@Table(name = "products")
@Getter @Setter
public class Product extends BaseEntity {

    @Column(name = "name", nullable = false)
    protected @NotEmpty String name;

    @Column(name = "is_active")
    protected Boolean isActive = false;

    @Column(name = "price")
    protected @NotNull Integer price;

    @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL, mappedBy = "product")
    protected ProductDetails productDetails;
}

ProductDetails.java

@Entity
@Getter @Setter
public class ProductDetails extends BaseEntity {

    @Column(name = "description")
    protected String description;

    @Column(name = "cuisines")
    protected String cuisines;

    @OneToOne(fetch = FetchType.LAZY, optional = false)
    @JoinColumn(name = "product_id")
    protected Product product;
}

存储库同时为product和productDetails实现CrudReporitory。我的POST请求是：

{
    "isActive": true,
    "name": "product4",
    "price": 10,
    "productDetails" : {
        "description": "prod desc 4",
        "cuisines": "south, asian"
    }
}

发送上述请求后，插入产品（created_at，updated_at，is_active，名称，价格）值（？，？，？，？，？）并将其插入到product_details（created_at，updated_at，美食，说明，product_id）值（？，？，？，？，？）

被执行，但是在查询2的情况下product_id为null，这给我带来的错误为SQLIntegrityConstraintViolationException: Column 'product_id' cannot be null

我该如何解决？

在连接列中坚持嵌套实体NULL值

0 个答案: