rails generate devise：インストールエラー1

Question

/home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb： 94：in rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. Gem Load Error is: Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. Backtrace for gem load error is: /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs/runtimes.rb:58:in自動検出 ' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs.rb:5:in <module:ExecJS>' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/execjs-2.7.0/lib/execjs.rb:4:in' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/uglifier-3.0.3/lib/uglifier.rb:5:in require' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/uglifier-3.0.3/lib/uglifier.rb:5:in ' /home/leto/（2レベル）in ' /home/lib/bundler/runtime.rb：91：require' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:91:inのブロック/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in each' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in必要なブロック ' /home /レト/ .rbe nv/versions/2.3.1/lib/ruby​​/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb：75：each' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:inで ' /home/leto/.rbenv/versionsが必要です。 /2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in require' /home/leto/rubyblog/config/application.rb:7:in ' /home/leto/.rbenv/versions/2.3.1/lib /ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:82:in require' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:82:in事前ロード ' /home/leto/.rbenv/versions/2.3.1/lib/ruby/ gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb：143：in serve' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:131:in実行ブロック ' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems /2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in loop' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:in run ' /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3。 0/gems/spring-2.0.0/lib/spring/application/boot.rb：19：<top (required)>' /home/leto/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:inで 'が必要です「 バンドラーエラーバックトレースrequire' -e:1:in /home/leto/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in：から （バンドラー:: GemRequireError） /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:90:in block (2 levels) in require' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in各 ' from/home /leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:86:in block in require' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:inそれぞれ ' /home/leto /.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/runtime.rb:75:in require' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler.rb:106:in/home/leto/ruby​​blogの ' が必要です。 /config/application.rb:7:in <top (required)>' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:82:in「/home/leto/.rbenv/versions/2.3.1/lib/ruby/geから が必要です。 /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/から ' 'を送信します。 2.3.0/gems/spring-2.0.0/lib/spring/application.rb：131：block in run' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application.rb:125:inループ ' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3。 0/gems/spring-2.0.0/lib/spring/application.rb：125：run' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-2.0.0/lib/spring/application/boot.rb:19:in ' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext require' from /home/leto/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in /kernel_require.rb:55:in '：1：-eから を `に' 必要

Answer 1

これは質問が、ちょうどエラー・スタックではありませんNode.jsのNode js download link

Answer 2

をインストールします。 nodejsとgem install uglifierをインストールしてください。エラースタックの正確な最初の行