omniauth facebook未初始化常量错误

我正在跟踪导演视频here，但是当我尝试运行我的服务器时，出现“未初始化的常量OmniAuth（NameError）”错误。当我删除这个文件时，服务器启动并显示主页，除了facebook登录认证链接返回一个路由错误“当然没有路由匹配[GET]”/ auth/facebook“omniauth facebook未初始化常量错误

我的问题与这stackoverlfow问题here但我的是发展模式。

所有的代码都是我wodnering这是什么。请帮助一样！

完整的错误是

C:/Sites/blog/config/initializers/omniauth.rb:1:in `<top (required)>': uninitialized constant OmniAuth (NameError) 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/engine.rb:652:in `block in load_config_initializer' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/activesupport-4.2.6/lib/active_support/notifications.rb:166:in `instrument' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/engine.rb:651:in `load_config_initializer' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/engine.rb:615:in `each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/engine.rb:615:in `block in <class:Engine>' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `instance_exec' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:30:in `run' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:55:in `block in run_initializers' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:226:in `block in tsort_each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:420:in `block (2 levels) in each_strongly_connected_component_from' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:429:in `each_strongly_connected_component_from' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:419:in `block in each_strongly_connected_component_from' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:44:in `each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:44:in `tsort_each_child' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:413:in `call' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:413:in `each_strongly_connected_component_from' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:347:in `block in each_strongly_connected_component' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `call' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:345:in `each_strongly_connected_component' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:224:in `tsort_each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/2.2.0/tsort.rb:203:in `tsort_each' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/initializable.rb:54:in `run_initializers' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/application.rb:352:in `initialize!' 
    from C:/Sites/blog/config/environment.rb:5:in `<top (required)>' 
    from C:/Sites/blog/config.ru:3:in `require' 
    from C:/Sites/blog/config.ru:3:in `block in <main>' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize' 
    from C:/Sites/blog/config.ru:in `new' 
    from C:/Sites/blog/config.ru:in `<main>' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:299:in `build_app_and_options_from_config' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:208:in `app' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/server.rb:61:in `app' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/rack-1.6.4/lib/rack/server.rb:336:in `wrapped_app' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/server.rb:139:in `log_to_stdout' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/server.rb:78:in `start' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:80:in `block in server' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `tap' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:75:in `server' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands/commands_tasks.rb:39:in `run_command!' 
    from C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/railties-4.2.6/lib/rails/commands.rb:17:in `<top (required)>' 
    from bin/rails:4:in `require' 
    from bin/rails:4:in `<main>'

此外，如果/初始化/ omniaut h.rb在其文件夹中我无法生成用户模型我需要将其删除以便执行此操作？

我安装了omniauth-facebook gem的最新版本，并运行了bundle install。

来源

2016-08-12 Lee Eather

'提供商：脸谱，ENV [ 'FACEBOOK_APP_ID']，ENV [ 'FACEBOOK_SECRET']'这条线应该是在你的'初始化/ devise.rb'文件，如果你正在使用的任何机会设计。也尝试添加更多细节 – Abhinay

不只是使用轨道转换示例和以下关于github上的文档omniauth和omniauth-facebook –

你的gemfile中有omniauth和omniauth-facebook吗？像：

gem 'omniauth' 
gem 'omniauth-facebook'

来源

2016-08-12 07:09:48 jethroo

是的，两个宝石都已安装。 –

这个答案其实是对的。这是我在cmd行缺乏理解，并把gem放在gemfile中。不只是通过cmd线安装。 –

omniauth facebook未初始化常量错误

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