Rails路由错误：未初始化的常量UsersController

Question

我查看了整个堆栈溢出，我找不到我需要的答案。我得到以下错误：未初始化不断UsersController

users_controller.rb 
class UsersController < ApplicationController 
    def show 
     @user = User.find(params[:id]) 
    end 
end 

show.html.erb

请帮助。

uninitialized constant UsersController

Rails.root：/首页/ Ubuntu的/工作区

应用程序跟踪|框架跟踪|全面跟踪 路线

路由匹配优先从上到下

Helper HTTP Verb Path Controller#Action 
Path/Url   
new_user_session_path GET /users/sign_in(.:format) devise/sessions#new 
user_session_path POST /users/sign_in(.:format) devise/sessions#create 
destroy_user_session_path DELETE /users/sign_out(.:format) devise/sessions#destroy 
user_password_path POST /users/password(.:format) devise/passwords#create 
new_user_password_path GET /users/password/new(.:format) devise/passwords#new 
edit_user_password_path GET /users/password/edit(.:format) devise/passwords#edit 
PATCH /users/password(.:format) devise/passwords#update 
PUT /users/password(.:format) devise/passwords#update 
cancel_user_registration_path GET /users/cancel(.:format) users/registrations#cancel 
user_registration_path POST /users(.:format) users/registrations#create 
new_user_registration_path GET /users/sign_up(.:format) users/registrations#new 
edit_user_registration_path GET /users/edit(.:format) users/registrations#edit 
PATCH /users(.:format) users/registrations#update 
PUT /users(.:format) users/registrations#update 
DELETE /users(.:format) users/registrations#destroy 
user_profile_path POST /users/:user_id/profile(.:format) profiles#create 
new_user_profile_path GET /users/:user_id/profile/new(.:format) profiles#new 
edit_user_profile_path GET /users/:user_id/profile/edit(.:format) profiles#edit 
GET /users/:user_id/profile(.:format) profiles#show 
PATCH /users/:user_id/profile(.:format) profiles#update 
PUT /users/:user_id/profile(.:format) profiles#update 
DELETE /users/:user_id/profile(.:format) profiles#destroy 
users_path GET /users(.:format) users#index 
POST /users(.:format) users#create 
new_user_path GET /users/new(.:format) users#new 
edit_user_path GET /users/:id/edit(.:format) users#edit 
user_path GET /users/:id(.:format) users#show 
PATCH /users/:id(.:format) users#update 
PUT /users/:id(.:format) users#update 
DELETE /users/:id(.:format) users#destroy 
contacts_path GET /contacts(.:format) contacts#index 
POST /contacts(.:format) contacts#create 
new_contact_path GET /contacts/new(.:format) contacts#new 
edit_contact_path GET /contacts/:id/edit(.:format) contacts#edit 
contact_path GET /contacts/:id(.:format) contacts#show 
PATCH /contacts/:id(.:format) contacts#update 
PUT /contacts/:id(.:format) contacts#update 
DELETE /contacts/:id(.:format) contacts#destroy 
about_path GET /about(.:format) pages#about 
root_path GET/ pages#home 

请求

参数：

{ “ID”=> “5”} 切换会话转储 切换env dump 回应

标题：

无

这是唯一的错误消息，我流汗： 路由错误 uninitialized constant UsersController

activesupport (4.2.1) lib/active_support/inflector/methods.rb:261:in `const_get' 
activesupport (4.2.1) lib/active_support/inflector/methods.rb:261:in `block in constantize' 
activesupport (4.2.1) lib/active_support/inflector/methods.rb:259:in `each' 
activesupport (4.2.1) lib/active_support/inflector/methods.rb:259:in `inject' 
activesupport (4.2.1) lib/active_support/inflector/methods.rb:259:in `constantize' 
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:70:in `controller_reference' 
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:60:in `controller' 
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:39:in `serve' 
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:43:in `block in serve' 
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:in `each' 
actionpack (4.2.1) lib/action_dispatch/journey/router.rb:30:in `serve' 
actionpack (4.2.1) lib/action_dispatch/routing/route_set.rb:819:in `call' 
warden (1.2.3) lib/warden/manager.rb:35:in `block in call' 
warden (1.2.3) lib/warden/manager.rb:34:in `catch' 
warden (1.2.3) lib/warden/manager.rb:34: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 (4.2.1) lib/action_dispatch/middleware/params_parser.rb:27:in `call' 
actionpack (4.2.1) 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 (4.2.1) lib/action_dispatch/middleware/cookies.rb:560:in `call' 
activerecord (4.2.1) lib/active_record/query_cache.rb:36:in `call' 
activerecord (4.2.1) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call' 
activerecord (4.2.1) lib/active_record/migration.rb:378:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' 
activesupport (4.2.1) lib/active_support/callbacks.rb:88:in `call' 
activesupport (4.2.1) lib/active_support/callbacks.rb:88:in `_run_callbacks' 
activesupport (4.2.1) lib/active_support/callbacks.rb:776:in `_run_call_callbacks' 
activesupport (4.2.1) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (4.2.1) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/reloader.rb:73:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/remote_ip.rb:78:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' 
railties (4.2.1) lib/rails/rack/logger.rb:38:in `call_app' 
railties (4.2.1) lib/rails/rack/logger.rb:20:in `block in call' 
activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:in `block in tagged' 
activesupport (4.2.1) lib/active_support/tagged_logging.rb:26:in `tagged' 
activesupport (4.2.1) lib/active_support/tagged_logging.rb:68:in `tagged' 
railties (4.2.1) lib/rails/rack/logger.rb:20:in `call' 
actionpack (4.2.1) 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 (4.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' 
rack (1.6.4) lib/rack/lock.rb:17:in `call' 
actionpack (4.2.1) lib/action_dispatch/middleware/static.rb:113:in `call' 
rack (1.6.4) lib/rack/sendfile.rb:113:in `call' 
railties (4.2.1) lib/rails/engine.rb:518:in `call' 
railties (4.2.1) 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' 

Answer 1

更改您乐从名

users_controllers.rb

要

users_controller.rb

Rails使用文件名在您的应用程序中查找控制器。