如何使before_action在所有控制器和操作之外运行，除了一个？ [英] How do I make a before_action to run on all controllers and actions except one?

问题描述

我有一个rails 4.2.x应用程序，设计用于身份验证 - 我有几个控制器。

我想要设计者authenticate_user！在所有控制器和操作上运行的方法，除了主控制器索引操作。 （当然，authenticate_user！本身会注意设计出一些动作，例如登录）//

我可以确保每个控制器操作在application_controller.rb中运行before_action：

  class ApplicationController< ActionController :: Base 
 before_action：authenticate_user！ 
 ... 
 end 
  

我还可以限制一组特定的操作在所有控制器：

  class ApplicationController< ActionController :: Base 
 before_action：authenticate_user !,除了：[：index] 
 ... 
 end 
  

但是我没有看到如何使home / index成为一个例外。

当然，我可以手动向每个控制器添加 before_action：authenticate_user！，并向家庭控制器的索引动作。但是这不是很干，如果我添加了新的控制器，我需要记住将这个before_action添加到每个控件中。

解决方案

p>你要做的是设置autheticate_user！在所有这样的控制器上：

  class ApplicationController< ActionController :: Base 
 before_action：authenticate_user！ 
 ... 
 end 
  

然后在您的HomeController上执行此操作：

  class HomeController< ApplicationController 
 skip_before_action：authenticate_user !, only：[：index] 
 ... 
 end 
  

希望这将有助于您！

I have a rails 4.2.x app, with devise for authentication - I have several controllers.

I want the devise authenticate_user! method to be run on all controllers and actions except on the home controller index action. (Of course, authenticate_user! itself takes care that devise actions like login go through)

I can ensure that every controller action runs the before_action in application_controller.rb:

class ApplicationController < ActionController::Base
  before_action :authenticate_user!
  ...
end

I can also restrict a specific set of actions on all controllers:

class ApplicationController < ActionController::Base
  before_action :authenticate_user!, except: [:index]
  ...
end

But I don't see how to make just home/index to be an exception.

I could, of course, manually add before_action :authenticate_user! to every controller, and add an exception to the home controller for the index action. But this is not very dry, and if I add new controllers, I need to remember to add this before_action to each of them.

解决方案

What you have to do is to set autheticate_user! on all controllers like that :

class ApplicationController < ActionController::Base
  before_action :authenticate_user!
  ...
end

And then on your HomeController you do that :

class HomeController < ApplicationController
  skip_before_action :authenticate_user!, only: [:index]
  ...
end

Hope this will help you !

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