Ruby on rails – 运行rails s命令时出错

我从http://railsinstaller.org/在我的Win7机器上安装了Rails安装程序。 我已经拥有了Ruby 1.9.2-p290。 通过安装程序安装ROR后，我下载rails以启动服务器，我收到以下错误。 有人能帮我理解这个错误的原因吗？

C:\Sites\ridemo>rails s => Booting WEBrick => Rails 3.1.0.rc6 application starting in development on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server Exiting C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/actionpack-3.1.0.rc6/lib/sp rockets/railtie.rb:21:in `block (2 levels) in ': undefined method `static_root=' for # (NoMethodError) from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/sprockets-2.0. 0/lib/sprockets/environment.rb:55:in `initialize' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/actionpack-3.1 .0.rc6/lib/sprockets/railtie.rb:20:in `new' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/actionpack-3.1 .0.rc6/lib/sprockets/railtie.rb:20:in `block in ' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/initializable.rb:25:in `instance_exec' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/initializable.rb:25:in `run' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/initializable.rb:50:in `block in run_initializers' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/initializable.rb:49:in `each' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/initializable.rb:49:in `run_initializers' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/application.rb:92:in `initialize!' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/railtie/configurable.rb:30:in `method_missing' from C:/Sites/ridemo/config/environment.rb:5:in `' from C:/Sites/ridemo/config.ru:4:in `require' from C:/Sites/ridemo/config.ru:4:in `block in ' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/builder.rb:51:in `instance_eval' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/builder.rb:51:in `initialize' from C:/Sites/ridemo/config.ru:1:in `new' from C:/Sites/ridemo/config.ru:1:in `' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/builder.rb:40:in `eval' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/builder.rb:40:in `parse_file' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/server.rb:200:in `app' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/commands/server.rb:46:in `app' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/server.rb:301:in `wrapped_app' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-1.3.2/lib /rack/server.rb:252:in `start' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/commands/server.rb:70:in `start' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/commands.rb:54:in `block in ' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/commands.rb:49:in `tap' from C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.0 .rc6/lib/rails/commands.rb:49:in `' from script/rails:6:in `require' from script/rails:6:in `' 

Answer 1

RailsInstaller现在支持Rails 3.1，但对以前的RC版本没有任何承诺。 就像@Fabio所说，尝试更新到最新的Rails版本（在你的Gemfile中更改它）。 此外，如果您已经安装了ruby版本，请确保通过检查系统环境路径变量来使用RailsInstaller版本。 Ruby的唯一途径应该是：

 C:\RailsInstaller\Ruby1.9.2\bin; 

Answer 2

需要运行以下内容并解决了问题： –

 gem install rails -v=3.1.0.rc8 

来自（https://github.com/sstephenson/sprockets/issues/172）