rails sができない

Question

前提・実現したいこと

progateでrailsの環境構築をやっています。
『5. ローカルでRailsサーバを立てる』のrails sでつまずきました。

発生している問題・エラーメッセージ

Could not find gem 'therubyracer' in any of the gem sources listed in your Gemfile.
Run bundle install to install missing gems.

該当のソースコード

ソースコード

試したこと

bundle installを実行しましたがエラーになります。

The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java.

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

An error occurred while installing libv8 (3.16.14.19), and Bundler
cannot continue.
Make sure that gem install libv8 -v '3.16.14.19' --source 'https://rubygems.org/' succeeds before bundling.

補足情報（FW/ツールのバージョンなど）

ruby 2.7.1
rails 5.2.4.3

Answer 1

ruby 2.7.1
rails 5.2.4.3

最新のrubyを使われていますが、よほどの理由がなければ、推奨版2.6.6をお勧めします。

RubyInstallers
WHICH VERSION TO DOWNLOAD?
If you don’t know what version to install and you’re getting started with Ruby, we recommend you use Ruby+Devkit 2.6.X (x64) installer.

ruby 2.6.6
Rails 5.2.4.3
で問題なくインストール、動作できています。

D:\Users\owner\Documents\ruby>bundle exec rails s

=> Booting Puma
=> Rails 5.2.4.3 application starting in development
=> Run `rails server -h` for more startup options
*** SIGUSR2 not implemented, signal based restart unavailable!
*** SIGUSR1 not implemented, signal based restart unavailable!
*** SIGHUP not implemented, signal based logs reopening unavailable!
Puma starting in single mode...
* Version 3.12.6 (ruby 2.6.6-p146), codename: Llamas in Pajamas
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Use Ctrl-C to stop

Comments

[00tamanegi00]

回答ありがとうございます。

データを全て消して
Ruby 2.6.6
rails 5.2.4.3
にしてrails sを実行しましたがエラーになります。

Traceback (most recent call last):
61: from bin/rails:3:in `<main>'
60: from bin/rails:3:in `load'
59: from /Users/yudai/sample_app/bin/spring:15:in `<top (required)>'
58: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
57: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
56: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `<top (required)>'
55: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/binstub.rb:11:in `load'
54: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/bin/spring:49:in `<top (required)>'
53: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client.rb:30:in `run'
52: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/command.rb:7:in `call'
51: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `call'
50: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/spring-2.1.0/lib/spring/client/rails.rb:28:in `load'
49: from /Users/yudai/sample_app/bin/rails:9:in `<top (required)>'
48: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `require'
47: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:257:in `load_dependency'
46: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `block in require'
45: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
44: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
43: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
42: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
41: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
40: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/commands.rb:18:in `<main>'
39: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/command.rb:46:in `invoke'
38: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/command/base.rb:69:in `perform'
37: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/thor-1.0.1/lib/thor.rb:392:in `dispatch'
36: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/thor-1.0.1/lib/thor/invocation.rb:127:in `invoke_command'
35: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/thor-1.0.1/lib/thor/command.rb:27:in `run'
34: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/commands/server/server_command.rb:142:in `perform'
33: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/commands/server/server_command.rb:142:in `tap'
32: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/railties-5.2.4.3/lib/rails/commands/server/server_command.rb:145:in `block in perform'
31: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `require'
30: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:257:in `load_dependency'
29: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `block in require'
28: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
27: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
26: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
25: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
24: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
23: from /Users/yudai/sample_app/config/application.rb:7:in `<main>'
22: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler.rb:114:in `require'
21: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler/runtime.rb:65:in `require'
20: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler/runtime.rb:65:in `each'
19: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler/runtime.rb:76:in `block in require'
18: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler/runtime.rb:76:in `each'
17: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/2.6.0/bundler/runtime.rb:81:in `block (2 levels) in require'
16: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
15: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
14: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
13: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
12: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
11: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/uglifier-4.2.0/lib/uglifier.rb:5:in `<main>'
10: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `require'
9: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:257:in `load_dependency'
8: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/activesupport-5.2.4.3/lib/active_support/dependencies.rb:291:in `block in require'
7: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:31:in `require'
6: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:22:in `require_with_bootsnap_lfi'
5: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/loaded_features_index.rb:92:in `register'
4: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `block in require_with_bootsnap_lfi'
3: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require'
2: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/execjs-2.7.0/lib/execjs.rb:4:in `<main>'
1: from /Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/execjs-2.7.0/lib/execjs.rb:5:in `<module:ExecJS>'
/Users/yudai/.rbenv/versions/2.6.6/lib/ruby/gems/2.6.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in `autodetect': Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)

[technocore]

あなたのバージョンでrailsは動作するので原因はインストール方法でしょう。
手順を見直してください。

[00tamanegi00]

node.jsをインストールしたら動作できました！
ありがとうございました。