rubyバージョンUP後 rails sできない

質問内容・実現したいこと

質問内容

herokuのデプロイの際にrubyのバージョンアップが必要になり

ruby 2.5.1 から ruby 3.1.0 に変更しrails s するもerrorになります。

実現したいこと

ローカルのrailsサーバーにつながりたい。

教えていただきたいこと

errorの解消方法またはヒント
errorの読み解き方
ここをこうした方がいいよなどご指摘をいただきたいです。

よろしくお願いします。

現状発生している問題・エラーメッセージ

$ rails s
/Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require': cannot load such file -- net/smtp (LoadError)
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:93:in `register'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:44:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:324:in `block in require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:291:in `load_dependency'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:324:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/mail-2.7.1/lib/mail.rb:9:in `<module:Mail>'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/mail-2.7.1/lib/mail.rb:3:in `<main>'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:105:in `register'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:324:in `block in require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:291:in `load_dependency'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:324:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/actionmailbox-6.0.4.4/lib/action_mailbox/mail_ext.rb:3:in `<main>'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/loaded_features_index.rb:105:in `register'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/bootsnap-1.9.4/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-6.0.4.4/lib/active_support/dependencies.rb:324:in `block in require'
        from /Users/mark_naito/.rbenv/versions/3.1.0/lib/ruby/gems/3.1.0/gems/activesupport-

行ったこと

bash
1#1 インストールできるrubyのバージョンを確認
2rbenv install --list
3
42.6.9
52.7.5
63.0.3
73.1.0
8jruby-9.3.2.0
9mruby-3.0.0
10rbx-5.0
11truffleruby-21.3.0
12truffleruby+graalvm-21.3.0
13
14Only latest stable releases for each Ruby implementation are shown.
15Use 'rbenv install --list-all / -L' to show all local versions.
16
17#2 リスト確認
18rbenv versions
19  system
20* 2.5.1 (set by /Users/mark_naito/.rbenv/version)
21  2.6.3
22  2.6.4
23  2.6.5
24  2.6.6
25
26#2 最新のrubyをインストール
27rbenv install 3.1.0
28Downloading openssl-1.1.1l.tar.gz...
29-> https://dqw8nmjcqpjn7.cloudfront.net/0b7a3e5e59c34827fe0c3a74b7ec8baef302b98fa80088d7f9153aa16fa76bd1
30Installing openssl-1.1.1l...
31Installed openssl-1.1.1l to /Users/mark_naito/.rbenv/versions/3.1.0
32
33Downloading ruby-3.1.0.tar.gz...
34-> https://cache.ruby-lang.org/pub/ruby/3.1/ruby-3.1.0.tar.gz
35Installing ruby-3.1.0...
36ruby-build: using readline from homebrew
37Installed ruby-3.1.0 to /Users/mark_naito/.rbenv/versions/3.1.0
38
39#2 再度確認
40rbenv versions
41
42  system
43* 2.5.1 (set by /Users/mark_naito/.rbenv/version)
44  2.6.3
45  2.6.4
46  2.6.5
47  2.6.6
48  3.1.0
49
50#4 ruby 3.1.0を全体に採用
51mark_naito@MacBook-Pro ~ % rbenv global 3.1.0
52
53#5　バージョンを切り替えとで変更を反映             
54mark_naito@MacBook-Pro ~ % rbenv rehash
55
56#6　しっかり変更されているか確認
57mark_naito@MacBook-Pro ~ % ruby -v
58ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-darwin21]
59
60#7 gemfileと.ruby-versionsファイルのrubyバージョンを3.1.0に変更
61
62#８ ホームディレクトリで実装していたので
63mark_naito@MacBook-Pro ~ % bundle install
64Could not locate Gemfile
65
66#9 開発中のアプリに移動
67mark_naito@MacBook-Pro ~ % cd my_application 
68mark_naito@MacBook-Pro my_application % cd lets_hang_out 
69
70#10 ファイルと実際のバージョンが一致しない
71mark_naito@MacBook-Pro lets_hang_out % bundle install   
72Your Ruby version is 2.5.1, but your Gemfile specified 3.1.0
73
74#11 開発中のアプリに移動するもrubyのバージョンはそのまま
75mark_naito@MacBook-Pro lets_hang_out % ruby -v
76ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin20]
77
78#12 確認
79mark_naito@MacBook-Pro lets_hang_out % rbenv versions
80  system
81* 2.5.1 (set by /Users/mark_naito/my_application/lets_hang_out/.ruby-version)
82  2.6.3
83  2.6.4
84  2.6.5
85  2.6.6
86  3.1.0
87
88#13 rubyのバージョンを切り替える
89mark_naito@MacBook-Pro lets_hang_out % rbenv global 3.1.0
90
91#14 インストールしたrubyを使用できるようにする
92mark_naito@MacBook-Pro lets_hang_out % rbenv rehash
93
94#15 rubyのバージョンが切り替わっているか確認するも切り替わっていない。。
95mark_naito@MacBook-Pro lets_hang_out % ruby -v
96ruby 2.5.1p57 (2018-03-29 revision 63029) [x86_64-darwin20]
97
98#16 localでrubyのバージョンを切り替える
99mark_naito@MacBook-Pro lets_hang_out % rbenv local 3.1.0
100
101#17 確認
102mark_naito@MacBook-Pro lets_hang_out % ruby -v          
103ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-darwin21]
104
105#18 ruby2.5.1で生成されたGemfile.lookを一旦削除
106mark_naito@MacBook-Pro lets_hang_out % rm gemfile.lock
107
108#19  Gemfile.lockをRubyバージョン3.0.1で再生成
109mark_naito@MacBook-Pro lets_hang_out % bundle install
110Fetching gem metadata from https://rubygems.org/.........
111
112#20 再生成されたGemfile.lockに記載されているRUBY VERSIONと一致しているのを確認し一致
113ruby -v
114ruby 3.1.0p0 (2021-12-25 revision fb4df44d16) [x86_64-darwin21]

該当のソースコード

Gemfile

ruby
1source 'https://rubygems.org'
2git_source(:github) { |repo| "https://github.com/#{repo}.git" }
3
4ruby '3.1.0'
5
6# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
7gem 'rails', '~> 6.0.4'
8# Use postgresql as the database for Active Record
9gem 'pg', '>= 0.18', '< 2.0'
10# Use Puma as the app server
11gem 'puma', '~> 4.1'
12# Use SCSS for stylesheets
13gem 'sass-rails', '>= 6'
14# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
15gem 'webpacker', '~> 4.0'
16# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
17gem 'turbolinks', '~> 5'
18# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
19gem 'jbuilder', '~> 2.7'
20# Use Redis adapter to run Action Cable in production
21# gem 'redis', '~> 4.0'
22# Use Active Model has_secure_password
23# gem 'bcrypt', '~> 3.1.7'
24
25# Use Active Storage variant
26# gem 'image_processing', '~> 1.2'
27
28# Reduces boot times through caching; required in config/boot.rb
29gem 'bootsnap', '>= 1.4.2', require: false
30
31group :development, :test do
32  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
33  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
34
35  # test
36  gem 'factory_bot_rails'
37  gem 'rspec-rails'
38end
39
40group :development do
41  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
42  gem 'web-console', '>= 3.3.0'
43  gem 'listen', '~> 3.2'
44  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
45  gem 'spring'
46  gem 'spring-watcher-listen', '~> 2.0.0'
47end
48
49# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
50gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
51
52# Assets
53gem 'bootstrap-sass'
54gem 'font-awesome-rails'
55gem 'jquery-rails'
56
57# Code analyze
58gem 'rails_best_practices'
59gem 'rubocop'
60
61# Debugger
62gem 'better_errors'
63gem 'binding_of_caller'