rails s -e testでlocalhost:3000を見るとエラーが出てしまいます。エラーを消したいです。

Question

rais s にオプションをつけ、「Yay! You’re on Rails!」を表示させたいのですが、consoleに次のようなエラーがでてしまいます。

rails s -e test

Puma caught this error: No route matches [GET] "/" (ActionController::RoutingError)
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/debug_exceptions.rb:65:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:38:in `call_app'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:26:in `block in call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:71:in `block in tagged'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:28:in `tagged'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-5.2.3/lib/active_support/tagged_logging.rb:71:in `tagged'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-5.2.3/lib/rails/rack/logger.rb:26:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/request_id.rb:27:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/method_override.rb:22:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/runtime.rb:22:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/activesupport-5.2.3/lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/executor.rb:14:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/actionpack-5.2.3/lib/action_dispatch/middleware/static.rb:127:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/rack-2.0.7/lib/rack/sendfile.rb:111:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-5.2.3/lib/rails/engine.rb:524:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/puma-3.12.1/lib/puma/configuration.rb:227:in `call'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:660:in `handle_request'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:474:in `process_client'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/puma-3.12.1/lib/puma/server.rb:334:in `block in run'
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/puma-3.12.1/lib/puma/thread_pool.rb:135:in `block in spawn_thread'

routes.rbはrails new から編集していません。

Rails.application.routes.draw do
  # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
end

こちらのページを参考に、最後のほう（++の箇所）に追加しました。
No route matches [GET] /assets | Railsトラブルシュート

Rails.application.configure do
  # Settings specified here will take precedence over those in config/application.rb.

  # Code is not reloaded between requests.
  config.cache_classes = true

  # Eager load code on boot. This eager loads most of Rails and
  # your application in memory, allowing both threaded web servers
  # and those relying on copy on write to perform better.
  # Rake tasks automatically ignore this option for performance.
  config.eager_load = true

  # Full error reports are disabled and caching is turned on.
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
  # config.require_master_key = true

  # Disable serving static files from the `/public` folder by default since
  # Apache or NGINX already handles this.
  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?

  # Compress JavaScripts and CSS.
  config.assets.js_compressor = :uglifier
  # config.assets.css_compressor = :sass

  # Do not fallback to assets pipeline if a precompiled asset is missed.
  config.assets.compile = false

  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb

  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
  # config.action_controller.asset_host = 'http://assets.example.com'

  # Specifies the header that your server uses for sending files.
  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX

  # Store uploaded files on the local file system (see config/storage.yml for options)
  config.active_storage.service = :local

  # Mount Action Cable outside main process or domain
  # config.action_cable.mount_path = nil
  # config.action_cable.url = 'wss://example.com/cable'
  # config.action_cable.allowed_request_origins = [ 'http://example.com', /http://example.*/ ]

  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
  # config.force_ssl = true

  # Use the lowest log level to ensure availability of diagnostic information
  # when problems arise.
  config.log_level = :debug

  # Prepend all log lines with the following tags.
  config.log_tags = [ :request_id ]

  # Use a different cache store in production.
  # config.cache_store = :mem_cache_store

  # Use a real queuing backend for Active Job (and separate queues per environment)
  # config.active_job.queue_adapter     = :resque
  # config.active_job.queue_name_prefix = "todo-slim_#{Rails.env}"

  config.action_mailer.perform_caching = false

  # Ignore bad email addresses and do not raise email delivery errors.
  # Set this to true and configure the email server for immediate delivery to raise delivery errors.
  # config.action_mailer.raise_delivery_errors = false

  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
  # the I18n.default_locale when a translation cannot be found).
  config.i18n.fallbacks = true

  # Send deprecation notices to registered listeners.
  config.active_support.deprecation = :notify

  # Use default logging formatter so that PID and timestamp are not suppressed.
  config.log_formatter = ::Logger::Formatter.new

  # Use a different logger for distributed setups.
  # require 'syslog/logger'
  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')

  if ENV["RAILS_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger    = ActiveSupport::TaggedLogging.new(logger)
  end

  # Do not dump schema after migrations.
  config.active_record.dump_schema_after_migration = false

  ++ config.public_file_server.enabled = true

end

Puma caught this error: No route matches [GET] "/" とあるので、/になにか設定するかページを用意しておく必要があるのかなと思うのですが、具体的にどうすればよいか探しても情報が出てきませんでした。
ヒントをいただけますようお願いいたします。

Comments

[siruku6]

rails s -e test は実行したことがないのでわからないのですが、 rails s や、rails s -e development ではいかがでしょうか？
それとも、 -e test でないとダメな理由があるのでしょうか？

[yoshipu]

ありがとうございます。

```
rails s -e development
```
ですと、うまくいきました。
ただ、理由は言えないのですが、-e test ではないといけないのです。

Answer 1

「Yay! You’re on Rails!」はdevelopment環境でのみ追加されるビルトインルートです。

他の環境で使いたいのならば、以下のようにrails/welcome#indexをroutes.rbに追加する必要があります。

Rails.application.routes.draw do
  root 'rails/welcome#index'
end

Comments

[yoshipu]

ありがとうございます！
うまくいきました。

[yoshipu]

ちなみに、'rails/welcome#index'は
/Users/hoge/.rbenv/versions/2.6.3/lib/ruby/gems/2.6.0/gems/railties-5.2.3/lib/rails/templates/rails/welcome/index.html.erb
にありました。