试图让这个工作,但我遇到了麻烦.我按照以下说明操作：
https://www.railstutorial.org/book/beginning#cha-beginning
https://www.railstutorial.org/book/beginning#cha-beginning
我进入1.3.2并输入：
rails server -b $IP -p $PORT
这导致此错误而不是WEBrick运行：
/usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails/helpers.rb:11:in `<top (required)>': uninitialized constant Sass::Script (NameError) from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails.rb:8:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails.rb:8:in `<top (required)>' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass-rails.rb:1:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass-rails.rb:1:in `<top (required)>' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:76:in `require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:72:in `each' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:72:in `block in require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:61:in `each' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler/runtime.rb:61:in `require' from /usr/local/rvm/gems/ruby-2.1.5@global/gems/bundler-1.7.6/lib/bundler.rb:133:in `require' from /home/ubuntu/workspace/hello_app/config/application.rb:7:in `<top (required)>' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `require' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:78:in `block in server' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `require' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `<top (required)>' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/client.rb:26:in `run' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/bin/spring:48:in `<top (required)>' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load' from /usr/local/rvm/gems/ruby-2.1.5@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `require' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `<top (required)>' from bin/rails:3:in `load' from bin/rails:3:in `<main>'
这似乎只有在您使用指定的代码替换Gemfile代码才能获得Ruby gem的显式版本(下面的代码)时才会发生这种情况.
gem 'rails','4.2.0' gem 'sass-rails','5.0.1' gem 'uglifier','2.5.3' gem 'coffee-rails','4.1.0' gem 'jquery-rails','4.0.3' gem 'turbolinks','2.3.0' gem 'jbuilder','2.2.3' gem 'sdoc','0.4.0',group: :doc group :development,:test do gem 'sqlite3','1.3.9' gem 'byebug','3.4.0' gem 'web-console','2.0.0.beta3' gem 'spring','1.1.3' end