错误 运行 rails 服务器第一次
Error running rails server first time
我刚开始学习 rails，我目前正在学习 Lynda 课程 Ruby Rails 3 Essential Training with Kevin Skoglund。在我所达到的这一点上，我们正在尝试构建我们的第一个 Web 应用程序，我们被指示通过键入 rails server 创建我们的服务器，正如你所看到的那样。当我键入它时，出现整个加载错误混乱，我不知道如何修复它。
C:\Users\Bryan\Documents\Sites\simple_cms>rails s
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:29:in `require': cannot load such file -- nokogiri/nokogiri (LoadError)
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:29:in `rescue in <top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:25:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/sanitize_helper.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/sanitize_helper.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:32:in `<module:TextHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:29:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:6:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:4:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:18:in `<module:FormTagHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:14:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:8:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:6:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_helper.rb:4:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_helper.rb:4:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:50:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:4:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:7:in `<module:LegacyAssetTagHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:6:in `<module:Rails>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:4:in `<module:Sprockets>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:45:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:45:in `<module:Helper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:7:in `<module:Rails>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:6:in `<module:Sprockets>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:5:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/railtie.rb:6:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/railtie.rb:6:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails/railtie.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails/railtie.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails.rb:11:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails.rb:11:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-rails.rb:1:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-rails.rb:1:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
from C:/Users/Bryan/Documents/Sites/simple_cms/config/application.rb:7:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:78:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:78:in `block in server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `tap'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
C:\Users\Bryan\Documents\Sites\simple_cms>
确保您的 Gemfile 包含：
gem 'nokogiri'
然后 运行 bundle install 命令，尝试 运行 rails s 如果你仍然得到同样的错误重启你的机器以确保 gemset 更新。
如果问题仍然存在，请再次编辑您的 Gemfile 并输入：
gem 'nokogiri', :require => false
运行 bundle install 并尝试 运行 rails s.
编辑
刚刚注意到您是 Windows 用户并使用 ruby 2.2，其中 nokogiri 尚未为您的环境编译，抱歉：
https://github.com/sparklemotion/nokogiri/issues/1256
尝试将您的 ruby 降级到 2.0.0。
我刚开始学习 rails，我目前正在学习 Lynda 课程 Ruby Rails 3 Essential Training with Kevin Skoglund。在我所达到的这一点上，我们正在尝试构建我们的第一个 Web 应用程序，我们被指示通过键入 rails server 创建我们的服务器，正如你所看到的那样。当我键入它时，出现整个加载错误混乱，我不知道如何修复它。
C:\Users\Bryan\Documents\Sites\simple_cms>rails s
C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:29:in `require': cannot load such file -- nokogiri/nokogiri (LoadError)
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:29:in `rescue in <top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/nokogiri-1.6.6.2-x64-mingw32/lib/nokogiri.rb:25:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/loofah-2.0.3/lib/loofah.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/rails-html-sanitizer-1.0.2/lib/rails-html-sanitizer.rb:2:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/sanitize_helper.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/sanitize_helper.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:32:in `<module:TextHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:29:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:6:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/text_helper.rb:4:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:18:in `<module:FormTagHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:14:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:8:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_tag_helper.rb:6:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_helper.rb:4:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers/form_helper.rb:4:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:50:in `<module:Helpers>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:4:in `<module:ActionView>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/actionview-4.2.4/lib/action_view/helpers.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:7:in `<module:LegacyAssetTagHelper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:6:in `<module:Rails>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:4:in `<module:Sprockets>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/legacy_asset_tag_helper.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:45:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:45:in `<module:Helper>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:7:in `<module:Rails>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:6:in `<module:Sprockets>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/rails/helper.rb:5:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/railtie.rb:6:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sprockets-rails-2.3.3/lib/sprockets/railtie.rb:6:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails/railtie.rb:3:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails/railtie.rb:3:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails.rb:11:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass/rails.rb:11:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-rails.rb:1:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/sass-rails-5.0.4/lib/sass-rails.rb:1:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
from C:/Users/Bryan/Documents/Sites/simple_cms/config/application.rb:7:in `<top (required)>'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:78:in `require'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:78:in `block in server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `tap'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:75:in `server'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
C:\Users\Bryan\Documents\Sites\simple_cms>
确保您的 Gemfile 包含：
gem 'nokogiri'
然后 运行 bundle install 命令，尝试 运行 rails s 如果你仍然得到同样的错误重启你的机器以确保 gemset 更新。
如果问题仍然存在，请再次编辑您的 Gemfile 并输入：
gem 'nokogiri', :require => false
运行 bundle install 并尝试 运行 rails s.
编辑
刚刚注意到您是 Windows 用户并使用 ruby 2.2，其中 nokogiri 尚未为您的环境编译，抱歉： https://github.com/sparklemotion/nokogiri/issues/1256
尝试将您的 ruby 降级到 2.0.0。