Question

我确切地说这个表（省略字段无关紧要）：

ID  |   NAME   | PARENT_ID

添加两行后，它看起来很精确：

ID  |   NAME   | PARENT_ID
1      "ONE"       null
2      "TWO"         1

现在，当我删除第二行时，第一行也会被删除。我想只从父级到子级进行级联，所以当我删除ID为2的行时，它应该只删除这一行。如果我删除ID为1的行，则应删除这两行。有人可以帮助我实现这个目标吗？

这就是我的实体的样子：

@Entity
@Getter
@DynamicUpdate
@EqualsAndHashCode(of = "name")
@NoArgsConstructor
@EntityListeners({AuditingEntityListener.class})
class Category {

    @Id
    @GeneratedValue(generator = "ID_GENERATOR")
    private Long id;

    @OneToMany(fetch = FetchType.LAZY, mappedBy = "category", cascade = CascadeType.ALL)
    private Set<Product> products;

    @Setter
    @Accessors(chain = true)
    @Column(unique = true, length = 20, nullable = false)
    private String name;

    @ManyToOne(cascade = {CascadeType.ALL})
    @JoinColumn(name = "parent_category_id")
    @Setter
    @Accessors(chain = true)
    private Category parentCategory;

    @OneToMany(mappedBy = "parentCategory")
    private Set<Category> subCategories = new HashSet<>();

    @CreatedDate
    @Column(updatable = false)
    @Getter
    private Instant creationDate;

    @LastModifiedDate
    @Getter
    @Version
    private Instant lastModifiedDate;

    Category(String name, Category parentCategory){
        this.name = name;
        this.parentCategory = parentCategory;
    }
}

Hibernate自连接 - 防止从子级移除级联

0 个答案: