ruby-on-rails - ROR 中的路由错误

Question

我的首页有两个按钮

1. 注册
2. 登录

如果我点击我应该重定向到 new.html.erb 页面，但是当我点击注册按钮时我发现了以下错误。请帮我解决这个错误。

错误:

No route matches [POST] "/posts/new"

我的代码片段如下。

在posts/index.html.erb

<h1>Index page</h1>
<h1>Register Here</h1>
<hr />
<p>
<%= button_to "REGISTER",posts_new_path%>
</p>
<p>
<%= button_to "LOGIN" %>
</p>

在posts/new.html.erb

<h1>Register Here</h1>

在controller/posts_controller.rb

class PostsController < ApplicationController
    def index
    end

    def new
       @user=User.new
    end
end

在config/routes.rb

Rails.application.routes.draw do
   root "posts#index"
   get "posts/new" => "posts#new"
  #resources:posts
  # 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 'welcome#index'

  # 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

我正在使用 rails version-4

Answer 1

posts_new_path 未在您的应用程序中的任何位置定义。

我建议您看一下 Rails routing guide获得更深入的理解，但解决此问题的最快方法是将 routes.rb 文件更改为:

Rails.application.routes.draw do
  root "posts#index"
  get "posts/new" => "posts#new", as: new_post
  #resources:posts
end

在你看来:

<%= button_to "REGISTER",new_post_path%>

在路由中使用 as 方法创建一个命名路由，使用在末尾用 path 或 url 指定的短语，它可以然后在您的 View 中使用。

您可以使用短语 resources :posts，它会在您的应用程序中为 7 个 CRUD 操作公开许多命名路由。阅读指南，因为它可能对您有好处，具体取决于您的应用程序的结构。