hql-按列表的第一项排序

Question

So I have a requirement that would need me to order the results by the id of the first item of the list.

public class Order {
private int id;
private List<Item> items;
}

To get an order where the list items contains '1234', I can do something like this:

from Order o where o.items[0].id = 1234

Back to my requirement, I thought this would work but it didn't:

from Order o order by o.items[0].id 

Any ideas? Thanks!

Answer 1

I believe I tried that before; and I don't think it is possible to do it through a list. If you had another column that is Item, then you can do it like order by o.item.id or if you add Item table to the join then order that way.

Answer 2

如果你的意思是值的最低ID item也不会做这你想要什么？

select distinct o from Order o join o.items item order by item.id