ruby-on-rails - Controller 不继承 before_filter

Question

所以我有 ApplicationController.rb:

class ApplicationController < ActionController::Base
  protect_from_forgery

  def decode_email
    params[:email] = URI::decode(params[:email])
  end
end

然后是 UsersController.rb:

class UsersController < ApplicationController
  before_filter :decode_email, only: [:show]

  def show
    #blah blah
  end
end

现在点击显示操作结果:

undefined local variable or method 'decode_email' for #<UsersController:0x007fb5f216a710>

为什么不继承该方法，以便将其正确用作 before_filter？

Answer 1

class ApplicationController < ActionController::Base
  protect_from_forgery

  private
    def decode_email
      params[:email] = URI::decode(params[:email])
    end
end

为我工作