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我正在使用本地安装的 Cloud9 和 Ruby on Rails 版本。我已经安装了“gumby-framework”和“modernizr-rails”gem，但是当我添加//= require modernizr到 applications.js 时它找不到它们。

当我运行$ bundle install它时，它会列出两个已安装的 gem。这$ gem env是返回的内容：

RubyGems Environment:
- RUBYGEMS VERSION: 2.4.6
- RUBY VERSION: 2.2.0 (2014-12-25 patchlevel 0) [x86_64-darwin14]
- INSTALLATION DIRECTORY: /Users/name/.rvm/gems/ruby-2.2.0
- RUBY EXECUTABLE: /Users/name/.rvm/rubies/ruby-2.2.0/bin/ruby
- EXECUTABLE DIRECTORY: /Users/name/.rvm/gems/ruby-2.2.0/bin
- SPEC CACHE DIRECTORY: /Users/name/.gem/specs
- SYSTEM CONFIGURATION DIRECTORY: /Users/name/.rvm/rubies/ruby-2.2.0/etc
- RUBYGEMS PLATFORMS:
 - ruby
 - x86_64-darwin-14
- GEM PATHS:
 - /Users/name/.rvm/gems/ruby-2.2.0
 - /Users/name/.rvm/gems/ruby-2.2.0@global
- GEM CONFIGURATION:
 - :update_sources => true
 - :verbose => true
 - :backtrace => false
 - :bulk_threshold => 1000
- REMOTE SOURCES:
 - https://rubygems.org/
- SHELL PATH:
 - /Users/name/.rvm/gems/ruby-2.2.0/bin
 - /Users/name/.rvm/gems/ruby-2.2.0@global/bin
 - /Users/name/.rvm/rubies/ruby-2.2.0/bin
 - /usr/local/bin
 - /usr/bin
 - /bin
 - /usr/sbin
 - /sbin
 - /usr/local/git/bin
 - /Users/name/.rvm/gems/ruby-2.2.0/bin
 - /Users/name/.rvm/gems/ruby-2.2.0@global/bin
 - /Users/name/.rvm/rubies/ruby-2.2.0/bin
 - /Users/name/.rvm/bin

我的项目的文件路径是'Users/name/c9sdk/quote_app'。我刚刚开始使用 Rails，所以我知道我必须遗漏一些明显的东西，非常感谢任何帮助。

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