hibernate - 单向一对多关系查询GORM grails

Question

Author{
 String name;
 List<Book> books
 static hasMany= [books: Book]
}

Book{
 int number_of_pages;
 String name;
}

我想查询和获取按number_of_pages排序的特定作者的前十本书

Answer 1

使用HQL，您可以执行以下操作:

    def query = "select book from Author author join author.books book where author=:author order by book.number_of_pages"
    def books = Author.executeQuery(query, [author: author], [max: 10])

注意:您应该将number_of_pages重命名为numberOfPages。