目前，我正在阅读 Michael Hartl 编写的 Ruby on Rails 教程第 3 章（http://ruby.railstutorial.org/chapters/static-pages#top），运行以下命令后收到错误消息：
rails generate rspec:install
这是我得到的错误：
Could not find addressable-2.2.8 in any of the sources
Run 'bundle install' to install missing gems.
如果我重新运行“捆绑安装”，这就是我得到的输出：
Using rake (0.9.2.2)
Using i18n (0.6.0)
Using multi_json (1.3.5)
Using activesupport (3.2.3)
Using builder (3.0.0)
Using activemodel (3.2.3)
Using erubis (2.7.0)
Using journey (1.0.3)
Using rack (1.4.1)
Using rack-cache (1.2)
Using rack-test (0.6.1)
Using hike (1.2.1)
Using tilt (1.3.3)
Using sprockets (2.1.3)
Using actionpack (3.2.3)
Using mime-types (1.18)
Using polyglot (0.3.3)
Using treetop (1.4.10)
Using mail (2.4.4)
Using actionmailer (3.2.3)
Using arel (3.0.2)
Using tzinfo (0.3.33)
Using activerecord (3.2.3)
Using activeresource (3.2.3)
Using addressable (2.2.8)
Using bundler (1.1.3)
Using nokogiri (1.5.2)
Using ffi (1.0.11)
Using childprocess (0.3.2)
Using libwebsocket (0.1.3)
Using rubyzip (0.9.8)
Using selenium-webdriver (2.21.2)
Using xpath (0.1.4)
Using capybara (1.1.2)
Using coffee-script-source (1.3.3)
Using execjs (1.3.2)
Using coffee-script (2.2.0)
Using rack-ssl (1.3.2)
Using json (1.7.3)
Using rdoc (3.12)
Using thor (0.14.6)
Using railties (3.2.3)
Using coffee-rails (3.2.2)
Using diff-lcs (1.1.3)
Using jquery-rails (2.0.0)
Using rails (3.2.3)
Using rspec-core (2.10.1)
Using rspec-expectations (2.10.0)
Using rspec-mocks (2.10.1)
Using rspec (2.10.0)
Using rspec-rails (2.10.0)
Using sass (3.1.18)
Using sass-rails (3.2.4)
Using sqlite3 (1.3.5)
Using uglifier (1.2.3)
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.
如果我输入“bundle show addressable”，我可以看到“addressable-2.2.8”的路径。
这就是我的 gemfile 的样子：
source 'https://rubygems.org'
gem 'rails', '3.2.3'
group :development, :test do
gem 'sqlite3', '1.3.5'
gem 'rspec-rails', '2.10.0'
gem 'addressable', '2.2.8'
end
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '3.2.4'
gem 'coffee-rails', '3.2.2'
gem 'uglifier', '1.2.3'
end
gem 'jquery-rails', '2.0.0'
group :test do
gem 'capybara', '1.1.2'
end
group :production do
gem 'pg', '0.12.2'
end
知道我使用的是 rbenv、rails 3.2.3 和 ruby 1.9.3p194 可能会有所帮助。
编辑：我觉得这可能与我使用 rbenv 的事实有关。我有一种感觉，rails 项目正在为这种特定的依赖项寻找错误的位置。有什么方法可以强制 Rails 应用程序在应用程序本身中存储依赖项/gems 并始终将它们加载到那里？