症状

Railsでアクションを編集して、「http://localhost:3000/api/v1/users/1 」を叩いたたところ、以下エラーが発生しました。翻訳すると「アクションが見つからない」と言われています。

ログは以下になります。

UsersController

AbstractController::ActionNotFound (The action 'show' could not be found for Api::V1::UsersController):

actionpack (6.0.3.7) lib/abstract_controller/base.rb:131:in `process'
actionview (6.0.3.7) lib/action_view/rendering.rb:39:in `process'
actionpack (6.0.3.7) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (6.0.3.7) lib/action_controller/metal.rb:254:in `dispatch'
actionpack (6.0.3.7) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (6.0.3.7) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.0.3.7) lib/action_dispatch/journey/router.rb:49:in `block in serve'
actionpack (6.0.3.7) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.0.3.7) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.0.3.7) lib/action_dispatch/routing/route_set.rb:834:in `call'
warden (1.2.9) lib/warden/manager.rb:36:in `block in call'
warden (1.2.9) lib/warden/manager.rb:34:in `catch'
warden (1.2.9) lib/warden/manager.rb:34:in `call'
rack (2.2.3) lib/rack/etag.rb:27:in `call'
rack (2.2.3) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.3) lib/rack/head.rb:12:in `call'
activerecord (6.0.3.7) lib/active_record/migration.rb:567:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.0.3.7) lib/active_support/callbacks.rb:101:in `run_callbacks'
actionpack (6.0.3.7) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/actionable_exceptions.rb:18:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/debug_exceptions.rb:32:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
railties (6.0.3.7) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.0.3.7) lib/rails/rack/logger.rb:26:in `block in call'
activesupport (6.0.3.7) lib/active_support/tagged_logging.rb:80:in `block in tagged'
activesupport (6.0.3.7) lib/active_support/tagged_logging.rb:28:in `tagged'
activesupport (6.0.3.7) lib/active_support/tagged_logging.rb:80:in `tagged'
railties (6.0.3.7) lib/rails/rack/logger.rb:26:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/request_id.rb:27:in `call'
rack (2.2.3) lib/rack/runtime.rb:22:in `call'
activesupport (6.0.3.7) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/executor.rb:14:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/static.rb:126:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.0.3.7) lib/action_dispatch/middleware/host_authorization.rb:82:in `call'
rack-cors (1.1.1) lib/rack/cors.rb:100:in `call'
railties (6.0.3.7) lib/rails/engine.rb:527:in `call'
puma (4.3.8) lib/puma/configuration.rb:228:in `call'
puma (4.3.8) lib/puma/server.rb:718:in `handle_request'
puma (4.3.8) lib/puma/server.rb:472:in `process_client'
puma (4.3.8) lib/puma/server.rb:328:in `block in run'
puma (4.3.8) lib/puma/thread_pool.rb:134:in `block in spawn_thread'

該当のコントローラーは以下になります。

UsersController

module Api
    module V1 
        class UsersController < ApplicationController
          def sho
            user = User.find_by(id: 1)
            render json: {
                        user: user
                    }, status: :ok
          end
        end
    end
end

解決方法

アクションの「show」の部分が「sho」になっていました。

UsersController

module Api
    module V1 
        class UsersController < ApplicationController
          def show
            user = User.find_by(id: 1)
            render json: {
                        user: user
                    }, status: :ok
          end
        end
    end
end

参考