Ruby on Rails中的单步批量删除

Question

如何从Rake任务发送这样的查询到数据库服务器而不删除"每个"循环中的逐个记录？

delete from data
where uuid in (
    select uuid
    from data
    group by uuid, raw, recdate
    having count(*)>1
);

Answer 1

ActiveRecord有delete_all适合您的方法.请注意,它不会调用destroy回调.http://api.rubyonrails.org/classes/ActiveRecord/Relation.html#method-i-delete_all