小编Hed*_*hog的帖子

我想知道的是:当我删除类别时,可以删除所有相关文章,当我删除文章时,也可以删除它的相关类别.

我设置了映射关系@ManyToOne,@OneToMany(cascade = CascadeType.ALL, mappedBy = " category")就像下面的代码一样,但是当我进行单元测试时,出现了几个问题,它不起作用.这是我的代码:

@Entity
public class Article extends Model {
    @Id
    public Long id;     

    @Constraints.Required       
    public String title;

    @Constraints.Required
    @Lob
    @Basic(fetch = FetchType.LAZY)
    public String content;

    public boolean published = false;

    @Formats.DateTime(pattern="yyyy-MM-dd")
    public Date publishDate;

    @ManyToMany(cascade = CascadeType.REMOVE)
    @Column(nullable = true)
    public List<Tag> tags = new ArrayList<Tag>();

    @ManyToOne
    @Column(nullable = true)
    public Category category;

    public static Finder<Long, Article> finder = new Finder<Long, Article>(Long.class, Article.class);

    public Article(String title, String content, Tag[] tags) …