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cannot load such file -- listen (LoadError)によってrails sできない!

Last updated at Posted at 2023-02-14

概要

rails sでサーバーを起動しようとしたのですが、できませんでした。
解決までの道のりをメモ的に記します。初心者向けですので、詳しい方で「もっと良い解決法がある」「その方法はダメだ」ということがあればご指摘ください。

起こったこと

ターミナル
ec2-user:~/environment/アプリ名 (main) $ rails s
=> Booting Puma
=> Rails 7.0.4 application starting in development 
=> Run `bin/rails server --help` for more startup options
Exiting
/home/ec2-user/.rvm/gems/ruby-3.1.2/gems/bootsnap-1.12.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:15:in `require': cannot load such file -- listen (LoadError)
~
~
~

解決法

「nulfasのブログ」様の【Rails】「Could not load the ‘listen’ gem. Add gem ‘listen’ to the development group of your Gemfile (LoadError)」 が出た時を参考にさせていただきました。

config.environment.development.rb

  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
  #↑コメントアウトする

end

これで解決しました!

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