rails s を実行すると`require': cannot load such file -- haml (LoadError)こちらのエラーが表示されてしまう

Question

解決したいこと

'require': cannot load such file -- haml (LoadError)

このエラーを解決し、rails sでlocalhostが開けるようにしたい

実行したこと

エラーメッセージが「 cannot load such file -- haml 」なので、ファイルが存在しないのか、ファイルが存在しても見つけられないのかの切り分けを行うため、以下のコマンドでファイルが存在するかどうかを確認しました

find ~/.rbenv -type f | grep haml;    

上記もコマンドの実行結果になります

/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/haml-5.2.1.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/haml-5.2.0.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/html2haml-2.2.0.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/default/haml-5.2.2.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/haml-rails-2.0.1.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/specifications/haml-5.1.2.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/haml-5.2.2.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/haml-5.2.1.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/haml-5.2.0.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/html2haml-2.2.0.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/haml-5.1.2.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/cache/haml-rails-2.0.1.gem
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/doc/sinatra-2.0.8.1/ri/Sinatra/Helpers/Stream/Templates/haml-i.ri
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/doc/faker-2.16.0/ri/Faker/Quotes/Shakespeare/hamlet-c.ri
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/doc/faker-2.16.0/ri/Faker/Quotes/Shakespeare/hamlet_quote-c.ri
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/doc/sinatra-2.1.0/ri/Sinatra/Helpers/Stream/Templates/haml-i.ri
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/.yardopts
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/html2haml.gemspec
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/test/erb_test.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/test/html2haml_test.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/test/jruby/erb_test.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/test/jruby/html2haml_test.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/test/test_helper.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/bin/html2haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/README.md
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/Rakefile
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/.gitignore
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/Changelog.markdown
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/lib/html2haml.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/lib/html2haml/html/erb.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/lib/html2haml/exec.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/lib/html2haml/html.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/html2haml-2.2.0/lib/html2haml/version.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/test/fixtures/routes.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/test/test_helper.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/gemfiles/rails_5_1.gemfile
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/gemfiles/rails_5_2.gemfile
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/gemfiles/rails_6.beta2.gemfile
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/README.md
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/Rakefile
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/.gitignore
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/tasks/erb2haml.rake
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/haml-rails.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/mailer/mailer_generator.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/mailer/templates/view.text.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/mailer/templates/view.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/mailer/templates/layout.text.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/mailer/templates/layout.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/controller/controller_generator.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/controller/templates/view.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/scaffold_generator.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/templates/show.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/templates/index.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/templates/_form.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/templates/edit.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/generators/haml/scaffold/templates/new.html.haml
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/haml-rails/version.rb
/Users/inouekeitarou/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/haml-rails-2.0.1/lib/rails/generators/haml/application_layout/application_layout_generator.rb
/Users/inouekeitarou/.rbenv/shims/haml
/Users/inouekeitarou/.rbenv/shims/html2haml

 gem list bundler

こちらでbundleのインストールのリストを表示

bundler (default: 2.3.8, 2.2.17, 2.2.14, default: 2.2.13, 2.2.11, 2.2.3, 2.1.4, 1.17.3, default: 1.17.2, 1.15.0)
capistrano-bundler (2.0.1)

環境

rails -v
Rails 6.0.5

bundle -v
Bundler version 1.17.3

Gemfile.lock
BUNDLED WITH
1.17.3

macOS

どなたか教えていただけると幸いです
宜しくお願いいたします。

#Gemfileの追加

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.5'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 6.0.0'
# Use mysql as the database for Active Record
gem 'mysql2', '>= 0.5.3'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 4.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Active Storage variant
# gem 'image_processing', '~> 1.2'

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.2', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end

group :development do
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  gem 'webdrivers'
end

gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem "haml-rails", ">= 1.0", '<= 2.0.1'
gem "font-awesome-sass"
gem 'jquery-rails'
gem 'ancestry'
gem 'kaminari'

#ログイン機能
gem 'devise'

#日本語化
gem 'rails-i18n', '~> 6.0'
gem 'devise-i18n'

gem 'seed-fu'

# gem 'devise-bootstrap-views', '~>1.0'

Comments

[maisumakun]

Gemfileはどのように書いていますか？

[tyosu]

こちら追記させていただきました。
宜しくお願いいたします!

[maisumakun]

bundle installは行っていますか？

[tyosu]

行っています！
```
Bundle complete! 26 Gemfile dependencies, 99 gems now installed.
Gems in the group production were not installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.
```

Answer 1

/Users/inouekeitarou/.rbenv/versions/2.6.5

2.6.5を使われていますが、ruby2.6の最新は2.6.10です。
以下の条件で試すと問題なくrailsは起動します。
2.6.10を試してみてはいかがでしょう。

ruby 2.6.10p210 (2022-04-12 revision 67958) [arm64-darwin21]
Rails 6.0.5
Bundler version 1.17.2
MacOS Monterey (M1)

$ bundle exec rails s
=> Booting Puma
=> Rails 6.0.5 application starting in development 
=> Run `rails server --help` for more startup options
Puma starting in single mode...
* Version 4.3.12 (ruby 2.6.10-p210), codename: Mysterious Traveller
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://127.0.0.1:3000
* Listening on tcp://[::1]:3000
Use Ctrl-C to stop

Comments

[tyosu]

ありがとうございます。
できました！！