在轨道4,5创建API - 未初始化的常量阿比:: V1 :: UsersController

Question

对于一个个人项目，我想这样创造的Rails 4

一个RESTful Web服务，我用rails-api，并添加创建了我的第一个项目以下代码：

的routes.rb在MyProject的>配置目录

MyProject::Application.routes.draw do 
    namespace :api, defaults: {format: 'json'} do 
     namespace :v1 do 
      resources :users 
     end 
    end 
end 

users_controll http://localhost:3000/api/v1/users/show我有这样的：MyProject的>应用程序>控制器> API> V1>用户目录

module Api 
    module V1 
     class UsersController < ApplicationController 
      def index 
      end 

      def create 
      end 

      def show 
      end 

      def update 
      end 

      def delete 
      end 
     end 
    end 
end 

当我开始使用命令行rails s铁轨服务器和去这个网址er.rb错误：

uninitialized constant Api::V1::UsersController

Rails.root: /Users/Jean/Development/MyProject

Application Trace | Framework Trace | Full Trace activesupport (4.0.4) lib/active_support/inflector/methods.rb:228:in const_get' activesupport (4.0.4) lib/active_support/inflector/methods.rb:228:in block in constantize' activesupport (4.0.4) lib/active_support/inflector/methods.rb:224:in each' activesupport (4.0.4) lib/active_support/inflector/methods.rb:224:in inject' activesupport (4.0.4) lib/active_support/inflector/methods.rb:224:in constantize' actionpack (4.0.4) lib/action_dispatch/routing/route_set.rb:76:in controller_reference' actionpack (4.0.4) lib/action_dispatch/routing/route_set.rb:66:in controller' actionpack (4.0.4) lib/action_dispatch/routing/route_set.rb:44:in call' actionpack (4.0.4) lib/action_dispatch/journey/router.rb:71:in block in call' actionpack (4.0.4) lib/action_dispatch/journey/router.rb:59:in each' actionpack (4.0.4) lib/action_dispatch/journey/router.rb:59:in call' actionpack (4.0.4) lib/action_dispatch/routing/route_set.rb:674:in call' rack (1.5.2) lib/rack/etag.rb:23:in call' rack (1.5.2) lib/rack/conditionalget.rb:25:in call' rack (1.5.2) lib/rack/head.rb:11:in call' actionpack (4.0.4) lib/action_dispatch/middleware/params_parser.rb:27:in call' activerecord (4.0.4) lib/active_record/query_cache.rb:36:in call' activerecord (4.0.4) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in call' activerecord (4.0.4) lib/active_record/migration.rb:373:in call' actionpack (4.0.4) lib/action_dispatch/middleware/callbacks.rb:29:in block in call' activesupport (4.0.4) lib/active_support/callbacks.rb:373:in _run__4323212420903942114__call__callbacks' activesupport (4.0.4) lib/active_support/callbacks.rb:80:in run_callbacks' actionpack (4.0.4) lib/action_dispatch/middleware/callbacks.rb:27:in call' actionpack (4.0.4) lib/action_dispatch/middleware/reloader.rb:64:in call' actionpack (4.0.4) lib/action_dispatch/middleware/remote_ip.rb:76:in call' actionpack (4.0.4) lib/action_dispatch/middleware/debug_exceptions.rb:17:in call' actionpack (4.0.4) lib/action_dispatch/middleware/show_exceptions.rb:30:in call' railties (4.0.4) lib/rails/rack/logger.rb:38:in call_app' railties (4.0.4) lib/rails/rack/logger.rb:20:in block in call' activesupport (4.0.4) lib/active_support/tagged_logging.rb:68:in block in tagged' activesupport (4.0.4) lib/active_support/tagged_logging.rb:26:in tagged' activesupport (4.0.4) lib/active_support/tagged_logging.rb:68:in tagged' railties (4.0.4) lib/rails/rack/logger.rb:20:in call' actionpack (4.0.4) lib/action_dispatch/middleware/request_id.rb:21:in call' rack (1.5.2) lib/rack/runtime.rb:17:in call' activesupport (4.0.4) lib/active_support/cache/strategy/local_cache.rb:83:in call' rack (1.5.2) lib/rack/lock.rb:17:in call' actionpack (4.0.4) lib/action_dispatch/middleware/static.rb:64:in call' railties (4.0.4) lib/rails/engine.rb:511:in call' railties (4.0.4) lib/rails/application.rb:97:in call' rack (1.5.2) lib/rack/lock.rb:17:in call' rack (1.5.2) lib/rack/content_length.rb:14:in call' rack (1.5.2) lib/rack/handler/webrick.rb:60:in service' /Users/Jean/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/webrick/httpserver.rb:138:in service' /Users/Jean/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/webrick/httpserver.rb:94:in run' /Users/Jean/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/webrick/server.rb:295:in block in start_thread'

我发现很多帖子＃2使用相同的错误，但答案没有帮助我解决我的问题。

谢谢！

Answer 1

，如果你有这样的路径：

MyProject > app > controllers > api > v1 > users

控制器应class Api::V1::Users::UsersController 如果这样的：

MyProject > app > controllers > api > v1 > users_controller.rb

然后class Api::V1::UsersController

对于缩写名称API::V1::UsersController，而不是Api::V1::Users::UsersController使用变形器：

in config/initializers/inflections.rb

ActiveSupport::Inflector.inflections(:en) do |inflect| 
    inflect.acronym 'API' 
end