如何在新的dto查询中按计算列排序

Question

我有这个问题：

[{\"DatumPoruke\":\"2015-12-14T12:10:20.841Z\",\"Tekst\":\"posao 1\",\"FromUserid\":\"user\",\"ToUserid\":\"driver\",\"ChatId\":\"1\"},{\"DatumPoruke\":\"2015-12-14T12:10:24.077Z\",\"Tekst\":\"Prihvaceno\",\"FromUserid\":\"driver\",\"ToUserid\":\"user\",\"ChatId\":\"1\"}] 

哪个不起作用，因为hibernate会忽略em.createQuery("select new SomeDto(some.name, " + "(select max(other.weight) from Other other where other.someId = some.id) as otherWeight" + ") from Some some order by otherWeight") .getResultList(); 而只是生成as otherWeight。

这种as col_1_0_查询是否有办法获取列的别名？ 如果没有：我怎么能做这样的查询（将查询结果映射到DTO构造函数）？

Answer 1

您可以尝试以下查询，该查询也应该更快：

select new SomeDto(some.name, max(other.weight))
from Other other right outer join other.some some
group by some.id, some.name
order by max(other.weight)

如果您还没有Other到Some，则需要引入多对一（或一对一）关联。