如果 before_action 返回 false，如何执行操作 [英] how to execute an action if the before_action returns false

问题描述

我知道使用以下代码:

before_action :signed_in?, only: [:new]

如果 signed_in? 返回 true，则操作 new 将被执行，但如果我希望 new 操作在 signed_in? 返回 false 我该怎么办?我是否必须创建一个新方法，例如 not_signed_in??

the action new will be executed if the signed_in? returns true, but instead if I want the new action to be executed when signed_in? returns false what do I have to do? Do I have to create a new method called, for instance, not_signed_in??

这是我的signed_in?方法

def signed_in?
  !@current_user.nil?
end

推荐答案

before_action 并不像您想象的那样工作 - 如果回调返回 false，它不会阻止操作的执行.我会以稍微不同的方式解决您的问题，例如:

before_action doesn't work as you think - it doesn't prevent action to be executed if callback returns false. I would solve your problem in a little bit different manner, for example:

before_action :redirect_to_root, :if => :signed_in?, :only => :new

# ...
private
def redirect_to_root
  redirect_to root_path
end

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