'rails console'命令在Rails 3.2.9中拋出錯誤

Question

我使用Rails 3.2.9與ruby 1.9.3（默認使用RVM）。 當我執行命令'rails console'/'rails c'時，從我的test_app的根目錄，顯示以下錯誤。

rails console
/home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/execjs-1.4.0/lib/execjs.rb:5:in `<module:ExecJS>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/execjs-1.4.0/lib/execjs.rb:4:in `<top (required)>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `<top (required)>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `each'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:66:in `block in require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `each'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler/runtime.rb:55:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327@global/gems/bundler-1.2.3/lib/bundler.rb:128:in `require'
    from /home/local/rajesh.co/Rajesh/blog/config/application.rb:7:in `<top (required)>'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.9/lib/rails/commands.rb:39:in `require'
    from /home/local/rajesh.co/.rvm/gems/ruby-1.9.3-p327/gems/railties-3.2.9/lib/rails/commands.rb:39:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

任何人都可以幫我解決這個問題嗎？

Answer 1

是的，我得到了我的問題的答案。

只需在應用程序文件夾的根目錄中打開文件“Gemfile”，然后在其中粘貼以下行。

gem 'execjs'

gem 'libv8'

gem 'therubyracer'

粘貼后，只需保存文件並在命令提示符下執行“bundle update”。

成功完成捆綁包更新后，您可以嘗試運行“rails c”或“rails console”來獲取rails控制台。 有用！！

謝謝。

Answer 2

嘗試安裝

gem 'therubyracer'

資源

HTH

Answer 3

安裝以下兩個：

gem 'execjs'
gem 'therubyracer'