在JPQL查询中列出

Question

我有一个Category类，看起来像这样：

@Entity  
@Table(name = "categories")
public class Category implements Serializable {

   // other attributes

  @ManyToMany
  @JoinTable(name = "articlecat",
             joinColumns = {@JoinColumn(name = "categoryId")},
             inverseJoinColumns = {@JoinColumn(name = "articleId")})
  private List<Article> articleList;

 // other methods
 }

如何使用单个Categories查询Article，如下所示：

SELECT c FROM Category c WHERE c.articleList contains :article

Answer 1

您可以使用MEMBER OF（OF是可选的）。

SELECT c FROM Category c WHERE :article MEMBER OF c.articleList