我正在使用this tutorial to deploy my app to VPS。我在DigitalOcean上创建了Ubuntu Server。我已经完成了所有的步骤。但是在第11步我必须编写这段代码：
bundle exec cap production deploy
它给我一个错误：
rake aborted!
DEBUG [280721fe] LoadError: cannot load such file -- nokogiri
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/loofah-2.0.2/lib/loofah.rb:3:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/loofah-2.0.2/lib/loofah.rb:3:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/sanitize_helper.rb:3:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/sanitize_helper.rb:3:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/text_helper.rb:32:in `<module:TextHelper>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/text_helper.rb:29:in `<module:Helpers>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/text_helper.rb:6:in `<module:ActionView>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/text_helper.rb:4:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_tag_helper.rb:18:in `<module:FormTagHelper>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_tag_helper.rb:14:in `<module:Helpers>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_tag_helper.rb:8:in `<module:ActionView>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_tag_helper.rb:6:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_helper.rb:4:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers/form_helper.rb:4:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers.rb:50:in `<module:Helpers>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers.rb:4:in `<module:ActionView>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/actionview-4.2.0/lib/action_view/helpers.rb:3:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/legacy_asset_tag_helper.rb:7:in `<module:LegacyAssetTagHelper>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/legacy_asset_tag_helper.rb:6:in `<module:Rails>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/legacy_asset_tag_helper.rb:4:in `<module:Sprockets>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/legacy_asset_tag_helper.rb:3:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/helper.rb:54:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/helper.rb:54:in `<module:Helper>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/helper.rb:7:in `<module:Rails>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/helper.rb:6:in `<module:Sprockets>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/rails/helper.rb:5:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/railtie.rb:6:in `require'
DEBUG [280721fe] /var/www/newsapp/shared/bundle/ruby/2.2.0/gems/sprockets-rails-2.3.1/lib/sprockets/railtie.rb:6:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/releases/20150710090114/config/application.rb:10:in `require'
DEBUG [280721fe] /var/www/newsapp/releases/20150710090114/config/application.rb:10:in `<top (required)>'
DEBUG [280721fe] /var/www/newsapp/releases/20150710090114/Rakefile:4:in `require'
DEBUG [280721fe] /var/www/newsapp/releases/20150710090114/Rakefile:4:in `<top (required)>'
DEBUG [280721fe] (See full trace by running task with --trace)
Ubuntu无法加载nokogiri。当它试图运行rake assets:precompile命令时发生。
我在Windows 7上编写了这个项目并将其上传到我的BitBucket存储库。我认为Capistrano自己运行bundle install并更改Gemfile.lock。
在Windows 7 x64上运行的本地计算机使用Ruby 2.1.5。
在Ubuntu Server 14.04 x64上运行的我的VPS使用Ruby 2.2.0。
我需要做什么？
====更新====
我想是因为我在Windows上编写了这个应用并试图将其上传到Ubuntu，我的Gemfile.lock会有所不同。我删除了它并尝试将其上传到我的VPS，它说它无法运行我的应用，因为我没有Gemfile.lock。
====更新====
我重启了我的VPS。我听说Nokogiri与2.2 Verisons of Ruby有冲突所以我安装了2.1.6版本。它仍然在预编译时给出了这个错误。
====更新====
我发现我想要启动的Ubuntu 每个rake任务都会引发这个错误。
答案 0 :(得分：0)
我读到Nokogiri在最新版本的Ruby（2.2）上遇到了一些问题，你应该考虑在你的服务器上回滚到Ruby 2.1。
答案 1 :(得分：0)
我找到了解决方案，我认为这不好。
在我的Gemfile.lock我删除了所有-64x-mingw个字符串，只保留了我的宝石的名称和版本号。
在平台中，我只是写了ruby而不是mingw。
嗯......那很有用。
Heroku删除Windows Gemfile.lock并自动生成新的。是否有可能向capistrano发送那种命令？