nicht initialisierte Konstante API :: V1 :: MusicController

Question

Es tut mir wirklich leid zu fragen, wenn es viele ähnliche Beiträge gibt, aber keine Nähte für mich arbeiten.

/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 

config/routes.rb:

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

Fehler:

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 block in 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 inject' 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:in block in serve' actionpack (5.1.2) lib/action_dispatch/journey/router.rb:33:in each' actionpack (5.1.2) 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:in call' actionpack (5.1.2) lib/action_dispatch/middleware/callbacks.rb:26:in block in call' 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 call' 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 tagged' 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:in call' activesupport (5.1.2) lib/active_support/cache/strategy/local_cache_middleware.rb:27:in call' actionpack (5.1.2) lib/action_dispatch/middleware/executor.rb:12:in call' actionpack (5.1.2) lib/action_dispatch/middleware/static.rb:125:in call' rack (2.0.3) lib/rack/sendfile.rb:111:in call' railties (5.1.2) lib/rails/engine.rb:522:in call' 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:in process_client' puma (3.9.1) lib/puma/server.rb:299:in block in run' puma (3.9.1) lib/puma/thread_pool.rb:120:in `block in spawn_thread'

Answer 1

Sie haben zwei Möglichkeiten : Um Ihre Ressourcen in den Plural zu ändern :musics (was empfohlen wird) oder um den Namen Ihres Controllers zu ändern d alle damit verbundenen Dateien (Routen, Verzeichnisse, Controller-Klasse) auf den singulären Weg.

Im Code, den Sie Sie Ihre resources Route im Plural Art und Weise angeben müssen zur Verfügung gestellt haben, deshalb Rails sagt es nicht die API::V1::MusicController nicht finden, weil der Controller MusicsController genannt wird, versuchen Sie einfach die fehlende s zum Hinzufügen Ihrer Route:

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