Question

当有很多类似的帖子但没有接缝可供我使用时，我真的很遗憾。

/app/controllers/api/v1/musics_controller.rb：

class Api::V1::MusicsController < ApplicationController::API
  def index
    music = Music.order('created_at DESC');
    render json: {status: 'SUCCESS', message:'Loaded articles', data:music},status: :ok
  end
end

配置/ routes.rb中：

Rails.application.routes.draw do
  namespace 'api' do
    namespace 'v1' do
      resources :music
    end
  end 
end

错误：

activesupport（5.1.2）lib / active_support / inflector / methods.rb:271:in const_get' activesupport (5.1.2) lib/active_support/inflector/methods.rb:271:in阻止constantize' activesupport（5.1.2）lib / active_support / inflector / methods.rb：267：in each' activesupport (5.1.2) lib/active_support/inflector/methods.rb:267:in注入'activesupport （5.1.2）lib / active_support / inflector / methods.rb：267：in constantize' actionpack (5.1.2) lib/action_dispatch/http/request.rb:82:in controller_class'actionpack（5.1.2） lib / action_dispatch / routing / route_set.rb:43:in controller' actionpack (5.1.2) lib/action_dispatch/routing/route_set.rb:29:in serve' actionpack（5.1.2）lib / action_dispatch / journey / router.rb：46：在block in serve' actionpack (5.1.2) lib/action_dispatch/journey/router.rb:33:in每个'actionpack（5.1.2）中 lib / action_dispatch / journey / router.rb:33:in serve' actionpack (5.1.2) lib/action_dispatch/routing/route_set.rb:832:in call'rack（2.0.3） lib / rack / etag.rb:25:in call' rack (2.0.3) lib/rack/conditional_get.rb:25:in call'rack（2.0.3） lib / rack / head.rb:12:in call' rack (2.0.3) lib/rack/session/abstract/id.rb:232:in context'rack（2.0.3） lib / rack / session / abstract / id.rb:226:in call' actionpack (5.1.2) lib/action_dispatch/middleware/cookies.rb:613:in call'activerecord （5.1.2）lib / active_record / migration.rb：556：在call' actionpack (5.1.2) lib/action_dispatch/middleware/callbacks.rb:26:in块中调用'activesupport（5.1.2）lib / active_support / callbacks.rb:97:in run_callbacks' actionpack (5.1.2) lib/action_dispatch/middleware/callbacks.rb:24:in调用'actionpack （5.1.2）lib / action_dispatch / middleware / executor.rb：12：in call' actionpack (5.1.2) lib/action_dispatch/middleware/debug_exceptions.rb:59:in call' actionpack（5.1.2） lib / action_dispatch / middleware / show_exceptions.rb:31:in call' railties (5.1.2) lib/rails/rack/logger.rb:36:in call_app'railties （5.1.2）lib / rails / rack / logger.rb:24:in block in call' activesupport (5.1.2) lib/active_support/tagged_logging.rb:69:in block in tagged' activesupport（5.1.2）lib / active_support / tagged_logging.rb:26:in tagged' activesupport (5.1.2) lib/active_support/tagged_logging.rb:69:in标记为'railties（5.1.2） lib / rails / rack / logger.rb:24:in call' actionpack (5.1.2) lib/action_dispatch/middleware/remote_ip.rb:79:in call'actionpack （5.1.2）lib / action_dispatch / middleware / request_id.rb:25:in call' rack (2.0.3) lib/rack/method_override.rb:22:in call'rack（2.0.3） lib / rack / runtime.rb：22：在call' activesupport (5.1.2) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in中调用'actionpack（5.1.2） lib / action_dispatch / middleware / executor.rb：12：在call' actionpack (5.1.2) lib/action_dispatch/middleware/static.rb:125:in呼叫'机架中（2.0.3）lib / rack / sendfile.rb：111：在call' railties (5.1.2) lib/rails/engine.rb:522:in调用'puma（3.9.1） lib / puma / configuration.rb：224：in call' puma (3.9.1) lib/puma/server.rb:602:in handle_request'puma（3.9.1） lib / puma / server.rb：435：在process_client' puma (3.9.1) lib/puma/server.rb:299:in块中运行'puma（3.9.1） lib / puma / thread_pool.rb：120：在`spawn_thread中的块'

Answer 1

您有两种选择：将资源更改为复数方式:musics（建议使用）或将控制器名称和所有相关文件（路由，目录，控制器类）更改为单数方式。

在您提供的代码中，您需要以复数方式指定resources路由，这就是Rails说它找不到API::V1::MusicController的原因，因为您的控制器名为MusicsController，请尝试将缺少的s添加到您的路线中：

Rails.application.routes.draw do
  namespace 'api' do
    namespace 'v1' do
      resources :musics
    end
  end 
end

未初始化的常量API :: V1 :: MusicController

1 个答案: