“未初始化的常量Sass :: Script（NameError）”
我首先要更改我的Gemfile（我删除了注释以使文本更短）：
source 'https://rubygems.org' gem 'rails', '4.2.0' gem 'sqlite3' gem 'sass-rails', '~> 5.0' gem 'uglifier', '>= 1.3.0' gem 'coffee-rails', '~> 4.1.0' gem 'jquery-rails' gem 'turbolinks' gem 'jbuilder', '~> 2.0' gem 'sdoc', '~> 0.4.0', group: :doc group :development, :test do gem 'byebug' gem 'web-console', '~> 2.0' gem 'spring' end 至：
source 'https://rubygems.org' 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
现在，当我尝试使用rails server -b $IP -p $PORT运行rails服务器时，我收到以下错误消息：
/usr/local/rvm/gems/ruby-2.1.5@rails4/gems/sass-rails-5.0.1/lib/sass/rails/helpers.rb:11:in `': 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 `' 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 `' 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 `' 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 `' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `require' from /home/ubuntu/workspace/hello_app/bin/rails:8:in `' 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 `' 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 `' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `require' from /home/ubuntu/workspace/hello_app/bin/spring:13:in `' from bin/rails:3:in `load' from bin/rails:3:in `'
我在更改Gemfile之前尝试运行服务器，但是它起作用，所以必须是因为新的更改。 另外我知道在错误中它说ruby-2.1.5 ，并且在我的Gemfile中我放了4.2.0但是我不知道如何更改它，或者如果这甚至是问题？ 我试图在源代码行下添加ruby '2.1.5' ，没有任何改变。 此外，我将'rails', '4.2.0'更改为2.1.5但是更新失败告诉我Could not find gem 'rails (= 2.1.5) ruby' in the gems available on this machine.
如上所述：
https://github.com/josh/sprockets-es6/issues/15
使用sass-rails v 5.0.2+ 。 这应该可以解决您的问题。 所以在gem文件中更改：
gem 'sass-rails', '5.0.3'
要么
gem 'sass-rails', '5.0.2'
更新：
由于链接现在已经关闭所以这个问题实际上是使用gem版本5.0.1所以只需运行：
bundle update sass-rails
最终将saas-rails gem更新为最新版本。 或者您可以按照上面的说明在gemfile中输入版本。
bundle update sass-rails在升级到Rails 4.2.2时对我有用。