Question

我有两个如下实体

public class Author{

   @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = 
      "author")
   @Fetch(FetchMode.SUBSELECT)
   private Set<Book> books;
}

public class Book{
    @ManyToOne
    @JoinColumn(name = "AUTHOR_ID_REF", nullable = false)
    private Author author;

    private String bookCategory;

    private String bookName
}

在此表中，我希望获取所有作者，除非Book表中有bookCategory ='Comic'AND bookName ='SuperKid'的作者行。如果bookCategory和bookName匹配，则我不应该得到作者。

感谢您的帮助。

Answer 1

您可以使用：

SELECT author FROM Author author
JOIN author.books book
WHERE book.bookCategory <> 'Comic' AND book.bookName <> 'SuperKid'

如何在HQL中为一对多映射创建查询

1 个答案: