omniauth facebook 未初始化常量错误

Question

我正在关注 rails 投射视频 here，但是当我尝试运行我的服务器时，我收到一个错误 "uninitialized constant OmniAuth (NameError)"。当我删除此文件时，服务器启动并显示主页，除了 link 到 facebook 登录身份验证 returns 路由错误 "No route matches [GET] "/auth/facebook”当然。

我的问题类似于这个 stackoverlfow 问题 here 但我的问题处于开发模式。

所有代码都是一样的我不知道这是什么。请帮忙！

完整错误是

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 /initializers/omniauth.rb 在其文件夹中，我无法生成用户模型，我需要将其删除才能执行此操作吗？

我安装了最新版本的 omniauth-facebook gem 并且运行捆绑安装。

Answer 1

你的 gemfile 里有 omniauth 和 omniauth-facebook 吗？喜欢：

gem 'omniauth'
gem 'omniauth-facebook'

omniauth facebook 未初始化常量错误

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omn​​iauth facebook 未初始化常量错误

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omniauth facebook 未初始化常量错误