ruby-on-rails - 无法启动 Rails 服务器，出现错误

Question

我是 Ruby on Rails 的新手。所以，我之前也出现过这个错误，我重新安装了rails和ruby并重新安装了它们，但我仍然得到它。错误是:

/home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:80:in `rescue in block (2 levels) in require': There was an error while trying to load the gem 'uglifier'. (Bundler::GemRequireError)
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `each'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:72:in `block in require'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `each'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler/runtime.rb:61:in `require'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/bundler-1.11.2/lib/bundler.rb:99:in `require'
    from /home/X/Documents/Appw/config/application.rb:7:in `<top (required)>'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:78:in `require'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:78:in `block in server'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/X/Documents/Appw/bin/rails:9:in `require'
    from /home/X/Documents/Appw/bin/rails:9:in `<top (required)>'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/client/rails.rb:28:in `load'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/client/rails.rb:28:in `call'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/client/command.rb:7:in `call'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/client.rb:28:in `run'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/bin/spring:51:in `<top (required)>'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/binstub.rb:11:in `load'
    from /home/X/.rvm/gems/ruby-2.2.1/gems/spring-1.6.1/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/X/Documents/Appw/bin/spring:13:in `require'
    from /home/X/Documents/Appw/bin/spring:13:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'

我尝试更新丑化器 gem，但没有任何反应。

Answer 1

看来你没有安装nodejs

sudo apt-get install nodejs

应该工作!!!