rails 服务器未在 rails 3.1.2 上启动答案

【问题标题】：rails server not starting on rails 3.1.2rails 服务器未在 rails 3.1.2 上启动
【发布时间】：2015-04-15 13:41:25
【问题描述】：

我在带有 rbenv 的 ubuntu 13.10 上使用带有 ruby 1.9.3 的 rails 3.2.1 我觉得一切都很好，但是当我尝试启动服务器时，它会给出一个错误，任何知道与此相关的任何人都请帮忙。非常需要。

=> Booting WEBrick
=> Rails 4.2.0 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server

Exiting
/home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require': cannot load such file -- uuid (LoadError)
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `block in require'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:274:in `require'
    from /home/ahmed/Insoshi-Rails-3/config/initializers/custom_requires.rb:17:in `<top (required)>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `block in load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:652:in `block in load_config_initializer'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-4.2.0/lib/active_support/notifications.rb:166:in `instrument'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:651:in `load_config_initializer'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:615:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/engine.rb:615:in `block in <class:Engine>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:150:in `block in tsort_each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:210:in `block (2 levels) in each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:219:in `each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:209:in `block in each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:44:in `tsort_each_child'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:203:in `each_strongly_connected_component_from'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:182:in `block in each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:180:in `each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:180:in `each_strongly_connected_component'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/tsort.rb:148:in `tsort_each'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/initializable.rb:54:in `run_initializers'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/application.rb:352:in `initialize!'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/railtie.rb:194:in `public_send'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/railtie.rb:194:in `method_missing'
    from /home/ahmed/Insoshi-Rails-3/config/environment.rb:5:in `<top (required)>'
    from /home/ahmed/Insoshi-Rails-3/config.ru:3:in `require'
    from /home/ahmed/Insoshi-Rails-3/config.ru:3:in `block in <main>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:55:in `instance_eval'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:55:in `initialize'
    from /home/ahmed/Insoshi-Rails-3/config.ru:in `new'
    from /home/ahmed/Insoshi-Rails-3/config.ru:in `<main>'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:49:in `eval'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:49:in `new_from_string'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/builder.rb:40:in `parse_file'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:299:in `build_app_and_options_from_config'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:208:in `app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:61:in `app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.6.0/lib/rack/server.rb:336:in `wrapped_app'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:139:in `log_to_stdout'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/server.rb:78:in `start'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /home/ahmed/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>

【问题讨论】：

使用 rvm 列表检查您的 rvm 版本。可能是它与您的应用程序的 rails 版本不兼容。
尝试升级/降级 gem 版本 gem install -v 1.4.2 类似的东西

标签： mysql ruby-on-rails localhost uuid ruby-1.9.3

【解决方案1】：

可能没有安装所有依赖项。如果你还没有使用 rvm 安装 ruby，你应该尝试使用它来安装你的 ruby 版本。

rvm install 1.9.3

或

rvm reinstall 1.9.3

请参考https://rvm.io/rvm/install 了解分步说明。

【讨论】：