Ruby on Railsでアプリケーションを作成しています.RailsとRakeのバージョンを変更しました。 rails server
はもう動作しません:「初期化されていない定数SampleApp」のため、Ruby on Railsは「サーバを起動できません」
~/sample_app/config.ru:4:in `block in <main>': uninitialized constant SampleApp (NameError)
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in `instance_eval'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:46:in `initialize'
from /home/sara/Documents/M1/s8/web avancé/projet/sample_app/config.ru:1:in `new'
from /home/sara/Documents/M1/s8/web avancé/projet/sample_app/config.ru:1:in `<main>'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:in `eval'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/builder.rb:35:in `parse_file'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:162:in `app'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:253:in `wrapped_app'
from /var/lib/gems/1.9.1/gems/rack-1.2.8/lib/rack/server.rb:204:in `start'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands/server.rb:65:in `start'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:30:in `block in <top (required)>'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in `tap'
from /var/lib/gems/1.9.1/gems/railties-3.0.7/lib/rails/commands.rb:27:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
どのバージョンのレールを更新しましたか? – trh
http://stackoverflow.com/questions/11695705/ruby-on-rails-micheal-hartls-chapter-5-something-strange - 役立つ場合はこれを確認してください。 – dp7
config/application.rbのモジュール行を構文エラーの場合。 –