Question

class ApplicationController < ActionController::Base
      before_action :test, only: [:index]

      def test
          ap 'test'
      end
    end

以上是在每一个索引动作之前运行的，无论是狗#index还是猫#index还是兔子#index。我应该如何让它在cat＃index和rabbits #index？

之前执行

我希望测试在许多控制器中的操作之前进行测试。

Answer 1

您可以跳过此方法：

class ApplicationController < ActionController::Base
  before_action :test, only: [:index]

  def test
    p 'test'
  end
end

class DogsController < ApplicationController
  skip_before_action :test
end

Answer 2

只需将您的呼叫转移到您希望其运行的控制器中。

class ApplicationController < ActionController::Base
  # nothing here!

  def test
    # ...
  end
end

class CatsController < ApplicationController
  before_action :test, only: [:index]
end

class RabbitsController < ApplicationController
  before_action :test, only: [:index]
end

Answer 3

其实很简单

在 application_controller 中创建 before_action 并检查 if: 传入的请求是针对相关的_controller。

class ApplicationController < ActionController::Base
  before_create :assign_setting, only: :create, if: :registration_controller?

  def registration_controller?
    params["controller"] == "registrations"
  end
 
  def assign_settings
    # your code
    puts "settings applied"
  end
end

特定控制器的before_action

3 个答案: