RailsにVue.jsを導入する

Question

#つまずいている事
下記の記事を参考にWebpackerを使用してRailsにVue.jsを導入しました。
その後rails g controllerした際に下記の'yarn'と'ActiveRecord'に関するエラーが発生して躓いております。。

参考URL：https://qiita.com/jnchito/items/30ab14ebf29b945559f6

#環境
ruby 2.6.0p0
Rails 5.1.6.2
vue@2.6.10
yarn 1.15.2

#エラーログ

ユーザー:~/environment/vue.js-tutorial (master) $ rails g controller Home index
warning Skipping preferred cache folder "/home/ec2-user/.cache/yarn" because it is not writable.                                                            
warning Selected the next writable cache folder in the list, will be "/tmp/.yarn-cache-501".                                                                
/home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/connection_specification.rb:188:in `rescue in spec': Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError)
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/connection_specification.rb:185:in `spec'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:880:in `establish_connection'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_handling.rb:58:in `establish_connection'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/railtie.rb:124:in `block (2 levels) in <class:Railtie>'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:49:in `each'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/base.rb:326:in `<module:ActiveRecord>'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/base.rb:25:in `<top (required)>'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `require'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `block in require'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:258:in `load_dependency'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `require'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:356:in `active_record_configured?'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:273:in `disconnect_database'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:107:in `preload'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:153:in `serve'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:141:in `block in run'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `loop'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `run'
        from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application/boot.rb:19:in `<top (required)>'
        from /home/ec2-user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home/ec2-user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from -e:1:in `<main>'

#エラーへの対処
①エラーをググってみた
→効果的な解決策がヒットせず。
②ActiveRecordに関するエラーについて
→すでにSqlite3がインストール済みであることを確認。（Gemfileは以下。）

#Gemgile

source 'https://rubygems.org'

git_source(:github) do |repo_name|
  repo_name = "#{repo_name}/#{repo_name}" unless repo_name.include?("/")
  "https://github.com/#{repo_name}.git"
end


# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.1.6'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use Puma as the app server
gem 'puma', '~> 3.7'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'therubyracer', platforms: :ruby

# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# 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', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development


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]
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '~> 2.13'
  gem 'selenium-webdriver'
end

group :development do
  # Access an IRB console on exception pages or by using <%= console %> anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

gem 'webpacker', github: 'rails/webpacker'

#追記：bundle installの結果

piyota08:~/environment/vue.js-tutorial (master) $ bundle
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`.
Using rake 12.3.2
Using concurrent-ruby 1.1.5
Using i18n 1.6.0
Using minitest 5.11.3
Using thread_safe 0.3.6
Using tzinfo 1.2.5
Using activesupport 5.1.6.2
Using builder 3.2.3
Using erubi 1.8.0
Using mini_portile2 2.4.0
Using nokogiri 1.10.1
Using rails-dom-testing 2.0.3
Using crass 1.0.4
Using loofah 2.2.3
Using rails-html-sanitizer 1.0.4
Using actionview 5.1.6.2
Using rack 2.0.6
Using rack-test 1.1.0
Using actionpack 5.1.6.2
Using nio4r 2.3.1
Using websocket-extensions 0.1.3
Using websocket-driver 0.6.5
Using actioncable 5.1.6.2
Using globalid 0.4.2
Using activejob 5.1.6.2
Using mini_mime 1.0.1
Using mail 2.7.1
Using actionmailer 5.1.6.2
Using activemodel 5.1.6.2
Using arel 8.0.0
Using activerecord 5.1.6.2
Using public_suffix 3.0.3
Using addressable 2.6.0
Using bindex 0.5.0
Using bundler 1.17.2
Using byebug 11.0.1
Using xpath 3.2.0
Using capybara 2.18.0
Using ffi 1.10.0
Using childprocess 0.9.0
Using coffee-script-source 1.12.2
Using execjs 2.7.0
Using coffee-script 2.4.1
Using method_source 0.9.2
Using thor 0.20.3
Using railties 5.1.6.2
Using coffee-rails 4.2.2
Using multi_json 1.13.1
Using jbuilder 2.8.0
Using rb-fsevent 0.10.3
Using rb-inotify 0.10.0
Using ruby_dep 1.5.0
Using listen 3.1.5
Using puma 3.12.1
Using rack-proxy 0.6.5
Using sprockets 3.7.2
Using sprockets-rails 3.2.1
Using rails 5.1.6.2
Using rubyzip 1.2.2
Using sass-listen 4.0.0
Using sass 3.7.3
Using tilt 2.0.9
Using sass-rails 5.0.7
Using selenium-webdriver 3.141.0
Using spring 2.0.2
Using spring-watcher-listen 2.0.1
Using sqlite3 1.4.0
Using turbolinks-source 5.2.0
Using turbolinks 5.2.0
Using uglifier 4.1.20
Using web-console 3.7.0
Using webpacker 4.0.2 from https://github.com/rails/webpacker.git (at master@554221c)
Bundle complete! 17 Gemfile dependencies, 72 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.

#お願い
一人では解決が難しいため
どなたかアドバイスをよろしくお願いします。

以上です。

Comments

[ryochin]

現状で rails c が正常に実行できますか？ bundler は利用していますか？

[iyore888]

コメント頂きありがとうございます！
rails cを実行した所エラーとなりました。（下記のエラー抜粋。）
/home/ec2-user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/bundler/resolver.rb:287:in `block in verify_gemfile_dependencies_are_found!': Could not find gem 'sqlite3 (~> 1.3.13)' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound)

またbundlerは利用しています。
よろしくお願い致します。

[ryochin]

bundler を利用しているということですから、bundle exec rails c を実行すべきかと思います。いずれにしても bundle install を実行した結果もほしいところです。

[iyore888]

コメント頂き有難うございます！
本文にbundle installの結果を追記致しました。
bundle exec rails cというコマンドは調べてみて分からなかったのですが
rails cと何か違いがあるのでしょうか？

またbundle exec rails cの結果は文字数制限により下記に記載させて頂きます。
####
#追記：bundle exec rails cの結果
```
ユーザー:~/environment/vue.js-tutorial (master) $ bundle exec rails c
warning Skipping preferred cache folder "/home/ec2-user/.cache/yarn" because it is not writable.
warning Selected the next writable cache folder in the list, will be "/tmp/.yarn-cache-501".
/home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/connection_specification.rb:188:in `rescue in spec': Specified 'sqlite3' for database adapter, but the gem is not loaded. Add `gem 'sqlite3'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord). (Gem::LoadError)
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/connection_specification.rb:185:in `spec'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:880:in `establish_connection'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/connection_handling.rb:58:in `establish_connection'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/railtie.rb:124:in `block (2 levels) in <class:Railtie>'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:69:in `instance_eval'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:69:in `block in execute_hook'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:60:in `with_execution_control'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:65:in `execute_hook'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:50:in `block in run_load_hooks'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:49:in `each'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/lazy_load_hooks.rb:49:in `run_load_hooks'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/base.rb:326:in `<module:ActiveRecord>'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activerecord-5.1.6.2/lib/active_record/base.rb:25:in `<top (required)>'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `require'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `block in require'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:258:in `load_dependency'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/activesupport-5.1.6.2/lib/active_support/dependencies.rb:292:in `require'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:356:in `active_record_configured?'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:273:in `disconnect_database'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:107:in `preload'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:153:in `serve'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:141:in `block in run'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `loop'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application.rb:135:in `run'
from /home/ec2-user/.rvm/gems/ruby-2.6.0/gems/spring-2.0.2/lib/spring/application/boot.rb:19:in `<top (required)>'
from /home/ec2-user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/ec2-user/.rvm/rubies/ruby-2.6.0/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from -e:1:in `<main>'
####

[ryochin]

まず、bundler とは何か、何をするものかを理解してから Rails 開発を始めることをお勧めします。いずれにしても、sqlite3 gem が入っていないということですから、入れてみて下さい。

[iyore888]

コメント有難う御座います。
bundlerはパッケージの種類やバージョンを管理、gemのインストールの際に必要なものという認識です。
また上記に記載しているgemfileにはsqlite3は記載しておりbundleも成功するため
sqlite3のインストールはできているはずなのですがご指摘のように、
インストールするようにメッセージが出てしまいます。
この点について解決ができないためアドバイス頂けますと幸いです。

[ryochin]

では、一度 gem を入れ直すのはどうでしょう。また、次のようにプロジェクトごとに入れるほうがトラブルが少なくなります。

rm -f .bundle/config
rm -rf vendor/bundle
bundle install --path=vendor/bundle
bundle exec rails c

[iyore888]

アドバイスありがとうございます。
アンインストール→インストールしてみましたがやはり同じエラーに戻ってしまいました。
yarnを入れる前のlinuxbrewのインストール時の挙動も少しおかしかったような気もしていますので
一度最初からやり直して見ようと思います。
長らくお時間取らせてしまい申し訳ありませんでした。
ありがとうございます。

Answer 1

環境構築を最初からやり直すことにしました。
もし原因がわかったら追記致します。