Ruby on rails 如何在Rails查询中找到nil的对立面_Ruby On Rails_Activerecord_Mongoid

Ruby on rails 如何在Rails查询中找到nil的对立面

ruby-on-rails activerecord

Ruby on rails 如何在Rails查询中找到nil的对立面,ruby-on-rails,activerecord,mongoid,Ruby On Rails,Activerecord,Mongoid,愉快地使用Mongoid和ActiveRecord如下： Task.where(project_id: params[:project_id], archived_at: nil) # find me the tasks for project_id that haven't been archived 但是，用什么简单的方式来表达相反的意思呢 # find me the tasks for project_id that have been archived # i.e. where arc

愉快地使用

Mongoid

和

ActiveRecord

如下：

Task.where(project_id: params[:project_id], archived_at: nil)
# find me the tasks for project_id that haven't been archived

但是，用什么简单的方式来表达相反的意思呢

# find me the tasks for project_id that have been archived
# i.e. where archived_at is not nil

无法找出或找出第一行代码的倒数。

我想这应该很简单：）

我想你应该用这个：

:archived_at.ne => nil

请看这里：