我对 Ruby on Rails 还很陌生，我仍然在琢磨它是如何工作的。抱歉，如果这是一个简单的问题，但是：
当他们提到在我的 Gemfile 中启用“therubyracer”gem 时，我正在关注关于将我的 Rails 应用程序部署到 EC2 的教程。我一直无法让服务器在我的 Gemfile 中使用这个 gem，所以我删除了它，但它仍在寻找它并出错。
我的问题是为什么？它是否缓存在我需要清除的地方？我运行了“捆绑安装”和“捆绑更新”，它们都对我产生了影响。当我尝试启动“rails server”时也是如此
这是我从终端运行“rails server”时得到的输出。
/Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/spec_set.rb:90:in `block in materialize': Could not find therubyracer-0.10.1 in any of the sources (Bundler::GemNotFound)
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/spec_set.rb:83:in `map!'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/spec_set.rb:83:in `materialize'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/definition.rb:127:in `specs'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/bundler-1.1.5/lib/bundler/environment.rb:27:in `specs'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.3/lib/rubygems-bundler/noexec.rb:41:in `candidate?'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.3/lib/rubygems-bundler/noexec.rb:60:in `setup'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194@global/gems/rubygems-bundler-1.0.3/lib/rubygems-bundler/noexec.rb:75:in `<top (required)>'
from /Users/chris/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
from /Users/chris/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
from /Users/chris/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
from /Users/chris/.rvm/gems/ruby-1.9.3-p194/bin/ruby_noexec_wrapper:9:in `<main>'