Ruby on Rails教程，Michael Hartl第2章

Question

在toy_app练习https://www.railstutorial.org/book/toy_app中，我在将运行应用程序时显示的默认消息从通用名称更改为“出现问题：“欢迎乘坐，您正在将红宝石骑在铁轨上”改为“你好，世界！” 通过将页面路由到application_controller文件中的hello方法。 这就是我在controller / application_controller中的内容：

  Rails.application.routes.draw do
  # Prevent CSFR attacks by raising an exception.
  # For API's, you may want to use :null_session instead
  protect_from_forgery with: :exception

  def hello
    render text: "hello, world!"
  end

end

以及在locales / routes.rb中

    Rails.application.routes.draw do

  # The priority is based upon order of creation: first created -> highest priority.
  # See how all your routes lay out with "rake routes".

  # You can have the root of your site routed with "root"
  root 'application#hello'

  # Example of regular route:
  #   get 'products/:id' => 'catalog#view'

  # Example of named route that can be invoked with purchase_url(id: product.id)
  #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase

  # Example resource route (maps HTTP verbs to controller actions automatically):
  #   resources :products

  # Example resource route with options:
  #   resources :products do
  #     member do
  #       get 'short'
  #       post 'toggle'
  #     end
  #
  #     collection do
  #       get 'sold'
  #     end
  #   end

  # Example resource route with sub-resources:
  #   resources :products do
  #     resources :comments, :sales
  #     resource :seller
  #   end

  # Example resource route with more complex sub-resources:
  #   resources :products do
  #     resources :comments
  #     resources :sales do
  #       get 'recent', on: :collection
  #     end
  #   end

  # Example resource route with concerns:
  #   concern :toggleable do
  #     post 'toggle'
  #   end
  #   resources :posts, concerns: :toggleable
  #   resources :photos, concerns: :toggleable

  # Example resource route within a namespace:
  #   namespace :admin do
  #     # Directs /admin/products/* to Admin::ProductsController
  #     # (app/controllers/admin/products_controller.rb)
  #     resources :products
  #   end
end

Answer 1

在application_controller.rb ，将Rails.application.routes.draw do替换为class ApplicationController < ActionController::Base 。 看起来这行被无意中替换为routes.rb的第一行的routes.rb 。

假设您已定义了一个类似app/views/layouts/application.html.erb的模板，那么您应该会做得很好。

Answer 2

您只应将路由放入路由文件中。

您不想在其中放置方法。

尝试将方法存储在控件中