rails sの際にエラーが起きました
$ rails s
=> Booting Puma
=> Rails 6.0.0.rc1 application starting in development
=> Run `rails server --help` for more startup options
error Couldn't find an integrity file
error Found 1 errors.
========================================
Your Yarn packages are out of date!
Please run `yarn install --check-files` to update.
========================================
To disable this check, please change `check_yarn_integrity`
to `false` in your webpacker config file (config/webpacker.yml).
yarn check v1.17.3
info Visit https://yarnpkg.com/en/docs/cli/check for documentation about this command.
Exiting
ログ通りに
yarn install --check-files
を実行するとサーバーは起動できるものの
ブラウザでアプリを開いた時にcssライブラリたちが効いていない
事象に陥りました。
$ yarn upgrade
とすることで一発で解決できます