顯示路由錯誤點擊軌道上的紅寶石鏈接時沒有路由匹配錯誤

Question

我試圖獲取10條最新文章的標題，這是博客應用程序在rails上使用ruby的一部分。我做到了。但是當談到路由時，我陷入了困境。

當我不喜歡

（此代碼是文章/指數的一部分）

<% @article_titles.each do |article_title|%> 
       <% if !article_title.nil? %> 
       <div style="margin-top:15px; margin-left:8px"> <%= link_to article_title.title, 
       article_path(article_title) %></div> 
      <% end %>  
      <% end %> 

它給了我路由錯誤

沒有路由匹配{：動作=> 「秀」， ：controller =>「articles」，：id =>＃}錯誤。

我嘗試另一種方式，如下圖所示： -

<% @article_titles.each do |article_title|%> 
       <% if !article_title.nil? %> 
       <div style="margin-top:15px; margin-left:8px"> <%= link_to article_title.title, 
       "/articles?id=#{article_title.id}" %></div> 
      <% end %>  
      <% end %> 

的routes.rb

match "articles/:id" => "articles#show" 

我沒有給出錯誤，只顯示在我的browserwith沒有行動發生的地址欄中("http://localhost:3000/articles?id=")。

耙路線：

 new_user_session GET /users/sign_in(.:format)       devise/sessions#new 
      user_session POST /users/sign_in(.:format)       devise/sessions#create 
    destroy_user_session DELETE /users/sign_out(.:format)       devise/sessions#destroy 
      user_password POST /users/password(.:format)       devise/passwords#create 
     new_user_password GET /users/password/new(.:format)      devise/passwords#new 
     edit_user_password GET /users/password/edit(.:format)     devise/passwords#edit 
         PUT /users/password(.:format)       devise/passwords#update 
cancel_user_registration GET /users/cancel(.:format)       devise/registrations#cancel 
     user_registration POST /users(.:format)         devise/registrations#create 
    new_user_registration GET /users/sign_up(.:format)       devise/registrations#new 
    edit_user_registration GET /users/edit(.:format)        devise/registrations#edit 
         PUT /users(.:format)         devise/registrations#update 
         DELETE /users(.:format)         devise/registrations#destroy 
        root  /            articles#index 
     dashboard_index GET /dashboard(.:format)        dashboard#index 
         POST /dashboard(.:format)        dashboard#create 
      new_dashboard GET /dashboard/new(.:format)       dashboard#new 
      edit_dashboard GET /dashboard/:id/edit(.:format)      dashboard#edit 
       dashboard GET /dashboard/:id(.:format)       dashboard#show 
         PUT /dashboard/:id(.:format)       dashboard#update 
         DELETE /dashboard/:id(.:format)       dashboard#destroy 
        tags GET /tags(.:format)         tags#index 
         POST /tags(.:format)         tags#create 
       new_tag GET /tags/new(.:format)        tags#new 
       edit_tag GET /tags/:id/edit(.:format)       tags#edit 
        tag GET /tags/:id(.:format)        tags#show 
         PUT /tags/:id(.:format)        tags#update 
         DELETE /tags/:id(.:format)        tags#destroy 
     article_comments GET /articles/:article_id/comments(.:format)   comments#index 
         POST /articles/:article_id/comments(.:format)   comments#create 
    new_article_comment GET /articles/:article_id/comments/new(.:format)  comments#new 
    edit_article_comment GET /articles/:article_id/comments/:id/edit(.:format) comments#edit 
     article_comment GET /articles/:article_id/comments/:id(.:format)  comments#show 
         PUT /articles/:article_id/comments/:id(.:format)  comments#update 
         DELETE /articles/:article_id/comments/:id(.:format)  comments#destroy 
           /articles/:article_id/articles/:id(.:format)  articles#show 
       articles GET /articles(.:format)        articles#index 
         POST /articles(.:format)        articles#create 
      new_article GET /articles/new(.:format)       articles#new 
      edit_article GET /articles/:id/edit(.:format)      articles#edit 
       article GET /articles/:id(.:format)       articles#show 
         PUT /articles/:id(.:format)       articles#update 
         DELETE /articles/:id(.:format)       articles#destroy 

articles_controller.rb

def index 
      @articles = Article.all(:order => "created_at DESC") 
     @article_titles = Article.select(:title).first(10) 
     end 
    def show 
     @article = Article.find(params[:id]) 

    end 

的routes.rb

Mau::Application.routes.draw do 
    devise_for :users 
    root :to => 'articles#index' 
    resources :dashboard 
    resources :tags 
    resources :articles do 
    resources :comments 
    match "articles/:id" => "articles#show" 
end 

調試日誌。

ActionController::RoutingError (No route matches [GET] "/assets/defaults.js"): 
    actionpack (3.2.11) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
    railties (3.2.11) lib/rails/rack/logger.rb:32:in `call_app' 
    railties (3.2.11) lib/rails/rack/logger.rb:16:in `block in call' 
    activesupport (3.2.11) lib/active_support/tagged_logging.rb:22:in `tagged' 
    railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
    rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
    rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
    activesupport (3.2.11) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
    rack (1.4.5) lib/rack/lock.rb:15:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/static.rb:62:in `call' 
    railties (3.2.11) lib/rails/engine.rb:479:in `call' 
    railties (3.2.11) lib/rails/application.rb:223:in `call' 
    rack (1.4.5) lib/rack/content_length.rb:14:in `call' 
    railties (3.2.11) lib/rails/rack/log_tailer.rb:17:in `call' 
    rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service' 
    c:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' 
    c:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' 
    c:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' 

我是否需要在文章的show action中添加一些內容？請建議我。

Answer 1

你的問題是，既然你選擇了@article_titles記錄不包含id屬性只有標題Article.select(:title)。一個更好的辦法來完成你想將在你的控制器是什麼：

@articles = Article.order("created_at DESC") 
@first_articles = @articles.limit(10) 

使用@first_articles你在哪裏使用@article_titles。

我也懷疑你是否需要@articles（你是否只顯示前10條記錄？）用代碼我建議它是一個ActiveRecord :: Relation，它不會被加載（命中數據庫），除非你實際上使用視圖中的變量，但是這是一個不同的主題SO質疑

Answer 2

刪除match "articles/:id" => "articles#show"，確保resources :articles存在，並article_path(@article)應該工作。

變化

Article.select(:title).first(10) 

通過

Article.select([:id, :title]).first(10) 

你總是需要選擇：ID與航線使用。

Answer 3

這可能會或不會解決你的問題，但是你錯過了年底end在你的路由阻塞：

Mau::Application.routes.draw do 
    devise_for :users 
    root :to => 'articles#index' 
    resources :dashboard 
    resources :tags 
    resources :articles do 
    resources :comments 
    match "articles/:id" => "articles#show" 
end 

應該

Mau::Application.routes.draw do 
    devise_for :users 
    root :to => 'articles#index' 
    resources :dashboard 
    resources :tags 
    resources :articles do 
    resources :comments 
    end 
end 

請注意，你不應該需要match路線你有，因爲它是resources :articles的一部分。

編輯

你也應該嘗試通過僅在ID是這樣的：

<% @article_titles.each do |article_title|%> 
    <% if !article_title.nil? %> 
     <div style="margin-top:15px; margin-left:8px"> 
      <%= link_to article_title.title, article_path(article_title.id) %> 
     </div> 
    <% end %>  
<% end %>