Ruby on rails：等价的rails查询得到这个 - ＆gt;

Question

如何在rails查询中从ruby获取此结果？

 select post_id, count(post_id)
 from comments
 group by post_id
 order by count(post_id) desc
 limit 5

Answer 1

积极的关系是惊人的。就是这样：

Comment.select("post_id, COUNT(post_id)").group("post_id").order("COUNT(post_id) DESC").limit(5).all

你应该更多地了解它，它真的很棒。