Ruby on rails 行动可以'；找不到_Ruby On Rails_Ruby On Rails 4

Ruby on rails 行动可以'；找不到

ruby-on-rails ruby-on-rails-4

Ruby on rails 行动可以'；找不到,ruby-on-rails,ruby-on-rails-4,Ruby On Rails,Ruby On Rails 4,为模糊的标题道歉。我按照教程学习cloud9上的RoR。我已对控制器进行了第1章标题1.4中所列的更改 class ApplicationController < ActionController::Base # Prevent CSRF attacks by raising an exception. # For APIs, you may want to use :null_session instead. protect_from_forgery with: :excep

为模糊的标题道歉。我按照教程学习cloud9上的RoR。我已对控制器进行了第1章标题1.4中所列的更改

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception

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

但是当我重新启动服务器时，我发现了一个错误

Started GET "/" for 69.157.46.139 at 2015-12-03 21:20:46 +0000

AbstractController::ActionNotFound (The action 'hello' could not be found for ApplicationController):
  actionpack (4.2.2) lib/abstract_controller/base.rb:132:in `process'
  actionview (4.2.2) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call'
  activerecord (4.2.2) lib/active_record/migration.rb:378:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.2) 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 (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  railties (4.2.2) lib/rails/engine.rb:518:in `call'
  railties (4.2.2) lib/rails/application.rb:164: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'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'


  Rendered /usr/local/rvm/gems/ruby-2.2.1/gems/web-console-2.0.0.beta3/lib/action_dispatch/templates/rescues/unknown_action.html.erb within rescues/layout (9.6ms)


Started GET "/" for 69.157.46.139 at 2015-12-03 21:21:46 +0000

AbstractController::ActionNotFound (The action 'hello' could not be found for ApplicationController):
  actionpack (4.2.2) lib/abstract_controller/base.rb:132:in `process'
  actionview (4.2.2) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call'
  activerecord (4.2.2) lib/active_record/migration.rb:378:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.2) 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 (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  railties (4.2.2) lib/rails/engine.rb:518:in `call'
  railties (4.2.2) lib/rails/application.rb:164: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'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'


  Rendered /usr/local/rvm/gems/ruby-2.2.1/gems/web-console-2.0.0.beta3/lib/action_dispatch/templates/rescues/unknown_action.html.erb within rescues/layout (0.6ms)

我已经尝试了

root to:'application#hello'

，但仍然没有成功

应用程序控制器不用于定义操作。这是基本控制器，其他控制器可能应从中继承行为/属性。您应该创建另一个控制器并在那里定义hello

使用发电机

rails g控制器欢迎大家好

路由文件

root欢迎#你好

获取“你好”=>“欢迎”#你好”

app/controllers/welcome_controller.rb

class WelcomeController

谢谢大家。问题在于Cloud9IDE。在创建

hello

方法之后，我确实保存了

应用程序\u控制器

，但是IDE直到我明确单击

文件>保存

后才保存它。当我

cat application\u Controller.rb

时，我发现那里不存在

hello

方法。

在设置根之前，尝试在路由中添加

match”/“=>“application\hello”

。查看此操作是否有效如果在终端中执行

rake routes

，会发生什么情况？你能发布你得到的吗？ApplicationController在文件

app/controllers/application\u controller.rb中

对吗？@Saurabh在做

match”/“=>”application\35; hello”

时给了我一个错误，我不应该使用

match而不指定HTTP方法

Started GET "/" for 69.157.46.139 at 2015-12-03 21:20:46 +0000

AbstractController::ActionNotFound (The action 'hello' could not be found for ApplicationController):
  actionpack (4.2.2) lib/abstract_controller/base.rb:132:in `process'
  actionview (4.2.2) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call'
  activerecord (4.2.2) lib/active_record/migration.rb:378:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.2) 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 (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  railties (4.2.2) lib/rails/engine.rb:518:in `call'
  railties (4.2.2) lib/rails/application.rb:164: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'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'


  Rendered /usr/local/rvm/gems/ruby-2.2.1/gems/web-console-2.0.0.beta3/lib/action_dispatch/templates/rescues/unknown_action.html.erb within rescues/layout (9.6ms)


Started GET "/" for 69.157.46.139 at 2015-12-03 21:21:46 +0000

AbstractController::ActionNotFound (The action 'hello' could not be found for ApplicationController):
  actionpack (4.2.2) lib/abstract_controller/base.rb:132:in `process'
  actionview (4.2.2) lib/action_view/rendering.rb:30:in `process'
  actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each'
  actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call'
  rack (1.6.4) lib/rack/etag.rb:24:in `call'
  rack (1.6.4) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.4) lib/rack/head.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.4) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.4) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call'
  activerecord (4.2.2) lib/active_record/migration.rb:378:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call'
  activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks'
  activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
  web-console (2.0.0.beta3) lib/action_dispatch/debug_exceptions.rb:13:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.2) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.2) 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 (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call'
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
  railties (4.2.2) lib/rails/engine.rb:518:in `call'
  railties (4.2.2) lib/rails/application.rb:164: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'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  /usr/local/rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'


  Rendered /usr/local/rvm/gems/ruby-2.2.1/gems/web-console-2.0.0.beta3/lib/action_dispatch/templates/rescues/unknown_action.html.erb within rescues/layout (0.6ms)

class WelcomeController < ApplicationController
  def hello

  end
end