Rails教程：刪除方法不起作用

Question

我正在按照本教程的說明進行操作： http : //guides.rubyonrails.org/getting_started.html我在刪除文章時遇到了問題。 我已經按照本教程的建議編寫了代碼，並且出現了“銷毀”鏈接，但是當我單擊它時，並沒有要求我確認並刪除文章，而是向我顯示了該文章的頁面，即它的功能完全相同就像我點擊“顯示”時一樣 這是我的代碼中無法執行我想要的地方的地方：

<td><%= article.title %></td>
        <td><%= article.text %></td>
        <td><%= link_to 'Show', article_path(article) %></td>
        <td><%= link_to 'Edit', edit_article_path(article) %></td>
        <td><%= link_to 'Destroy', article_path(article),
          method: :delete,
          data: { confirm: 'Are you sure?' } %></td>

我將不勝感激！

ArticlesController內部的destroy方法：

def destroy
    @article = Article.find(params[:id])
    @article.destroy
    redirect_to articles_path, alert: "Article successfully deleted"
end

route.rb：

Rails.application.routes.draw do
    get 'welcome/index'
    resources :articles
    root 'welcome#index'
end

這是單擊“ Destroy鏈接后的日志（很抱歉，它很長，我不知道最重要的是什么）：

Started GET "/articles/1" for ::1 at 2016-05-23 14:22:16 +0300  
Processing by ArticlesController#show as HTML  
Parameters: {"id"=>"1"}  
Article Load (0.0ms)  SELECT  "articles".* FROM "articles" WHERE "articles"."id" = ? LIMIT 1  [["id", 1]]

Rendered articles/show.html.erb within layouts/application (1.0ms)  
Completed 200 OK in 136ms (Views: 92.3ms | ActiveRecord: 0.0ms)  

Started GET "/stylesheets/default.css" for ::1 at 2016-05-23 14:22:16 +0300  
ActionController::RoutingError (No route matches [GET] "/stylesheets/default.css"):

actionpack (4.2.6) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'  
web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'  
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'  
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'  
actionpack (4.2.6) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'  
railties (4.2.6) lib/rails/rack/logger.rb:38:in `call_app'  
railties (4.2.6) lib/rails/rack/logger.rb:20:in `block in call'  
activesupport (4.2.6) lib/active_support/tagged_logging.rb:68:in `block in tagged'  
activesupport (4.2.6) lib/active_support/tagged_logging.rb:26:in `tagged'  
activesupport (4.2.6) lib/active_support/tagged_logging.rb:68:in `tagged'  
railties (4.2.6) lib/rails/rack/logger.rb:20:in `call'  
actionpack (4.2.6) lib/action_dispatch/middleware/request_id.rb:21:in `call'  
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'  
rack (1.6.4) lib/rack/runtime.rb:18:in `call'  
activesupport (4.2.6)     lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'  
rack (1.6.4) lib/rack/lock.rb:17:in `call'  
actionpack (4.2.6) lib/action_dispatch/middleware/static.rb:120:in `call'  
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'  
railties (4.2.6) lib/rails/engine.rb:518:in `call'  
railties (4.2.6) lib/rails/application.rb:165:in `call'  
rack (1.6.4) lib/rack/lock.rb:17:in `call'  
rack (1.6.4) lib/rack/content_length.rb:15:in `call'  
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'  
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'  
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'  
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'  

Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (5.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/routes/_route.html.erb (3.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/routes/_table.html.erb (2.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (2.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/routing_error.html.erb within rescues/layout (2763.6ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_markup.html.erb (1.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (1.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (0.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/style.css.erb within layouts/inlined_string (0.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/console.js.erb within layouts/javascript (1896.9ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/main.js.erb within layouts/javascript (0.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/error_page.js.erb within layouts/javascript (1.0ms)  
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/index.html.erb (4376.6ms)  


Started GET "/javascripts/default.js" for ::1 at 2016-05-23 14:22:25 +0300

ActionController::RoutingError (No route matches [GET] "/javascripts/default.js"):
  actionpack (4.2.6) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
web-console (2.3.0) lib/web_console/middleware.rb:28:in `block in call'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `catch'
web-console (2.3.0) lib/web_console/middleware.rb:18:in `call'
actionpack (4.2.6) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.6) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.6) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.6) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.6) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.6) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.6) lib/rails/rack/logger.rb:20:in `call'
actionpack (4.2.6) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.4) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.4) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.6) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
actionpack (4.2.6) lib/action_dispatch/middleware/static.rb:120:in `call'
rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties (4.2.6) lib/rails/engine.rb:518:in `call'
railties (4.2.6) lib/rails/application.rb:165:in `call'
rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack (1.6.4) lib/rack/content_length.rb:15:in `call'
rack (1.6.4) lib/rack/handler/webrick.rb:88:in `service'
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'


Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (5.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/routes/_route.html.erb (3.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/routes/_table.html.erb (2.5ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (2.5ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/actionpack-4.2.6/lib/action_dispatch/middleware/templates/rescues/routing_error.html.erb within rescues/layout (2777.2ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_markup.html.erb (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_inner_console_markup.html.erb within layouts/inlined_string (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/_prompt_box_markup.html.erb within layouts/inlined_string (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/style.css.erb within layouts/inlined_string (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/console.js.erb within layouts/javascript (1912.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/main.js.erb within layouts/javascript (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/error_page.js.erb within layouts/javascript (1.0ms)
Rendered C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/web-console-2.3.0/lib/web_console/templates/index.html.erb (4408.9ms)

Answer 1

在您的控制器中，您應該具有如下的destroy方法：

def destroy
    @article = Article.find(params[:id])
    @article.destroy
    redirect_to articles_path, alert: "Article successfully deleted"
end

Answer 2

刪除鏈接依賴於Rails ujs 。 您的瀏覽器是否啟用了javascript？