Rails服務器停止工作後（我相信）切換分支

Question

因此，我正在開發我的應用程序，一切都很好。所有的測試都通過了，應用程序工作得很好然後，我切換分支而不作任何更改，切換回來，並在嘗試再次運行「rails server」時出現此錯誤。這已經發生了幾次，我不知道爲什麼。

/Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require': no such file to load -- bcrypt_ext (LoadError) 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `block in require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `block in load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/bcrypt-ruby-3.0.1/lib/bcrypt.rb:12:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `block in require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `block in load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models/database_authenticatable.rb:2:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:60:in `const_get' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:60:in `block (2 levels) in devise' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:59:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:59:in `block in devise' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:86:in `devise_modules_hook!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/devise-1.4.9/lib/devise/models.rb:58:in `devise' 
    from /Users/beatjunkie84/Desktop/ProjectX/app/models/user.rb:16:in `<class:User>' 
    from /Users/beatjunkie84/Desktop/ProjectX/app/models/user.rb:13:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:454:in `load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:454:in `block in load_file' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:453:in `load_file' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:340:in `require_or_load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:491:in `load_missing_constant' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:183:in `block in const_missing' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:181:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:181:in `const_missing' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rake-0.9.2/lib/rake/ext/module.rb:36:in `const_missing' 
    from /Users/beatjunkie84/Desktop/ProjectX/app/admin/users.rb:1:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `block in load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `block in load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activeadmin-0.3.2/lib/active_admin/application.rb:132:in `block in load!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activeadmin-0.3.2/lib/active_admin/application.rb:132:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activeadmin-0.3.2/lib/active_admin/application.rb:132:in `load!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activeadmin-0.3.2/lib/active_admin/application.rb:155:in `routes' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activeadmin-0.3.2/lib/active_admin.rb:63:in `routes' 
    from /Users/beatjunkie84/Desktop/ProjectX/config/routes.rb:4:in `block in <top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/routing/route_set.rb:233:in `instance_exec' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/routing/route_set.rb:233:in `draw' 
    from /Users/beatjunkie84/Desktop/ProjectX/config/routes.rb:1:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `block in load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `block in load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:235:in `load' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:127:in `block in reload_routes!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:127:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:127:in `reload_routes!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:120:in `block in routes_reloader' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/file_update_checker.rb:32:in `call' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/file_update_checker.rb:32:in `execute_if_updated' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/railtie.rb:14:in `block (2 levels) in <class:Railtie>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/callbacks.rb:419:in `_run_prepare_callbacks' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/callbacks.rb:40:in `initialize' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:33:in `new' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:33:in `build' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:79:in `block in build' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:79:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:79:in `inject' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/actionpack-3.0.1/lib/action_dispatch/middleware/stack.rb:79:in `build' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:162:in `app' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application/finisher.rb:35:in `block in <module:Finisher>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/initializable.rb:25:in `instance_exec' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/initializable.rb:25:in `run' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/initializable.rb:50:in `block in run_initializers' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/initializable.rb:49:in `each' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/initializable.rb:49:in `run_initializers' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:134:in `initialize!' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/application.rb:77:in `method_missing' 
    from /Users/beatjunkie84/Desktop/ProjectX/config/environment.rb:5:in `<top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `block in require' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `block in load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:591:in `new_constants_in' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:225:in `load_dependency' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:239:in `require' 
    from /Users/beatjunkie84/Desktop/ProjectX/config.ru:3:in `block in <main>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/builder.rb:46:in `instance_eval' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/builder.rb:46:in `initialize' 
    from /Users/beatjunkie84/Desktop/ProjectX/config.ru:1:in `new' 
    from /Users/beatjunkie84/Desktop/ProjectX/config.ru:1:in `<main>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/builder.rb:35:in `eval' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/builder.rb:35:in `parse_file' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/server.rb:162:in `app' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/server.rb:253:in `wrapped_app' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/rack-1.2.4/lib/rack/server.rb:204:in `start' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/commands/server.rb:65:in `start' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/commands.rb:30:in `block in <top (required)>' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/commands.rb:27:in `tap' 
    from /Users/beatjunkie84/Desktop/ProjectX/bundler/ruby/1.9.1/gems/railties-3.0.1/lib/rails/commands.rb:27:in `<top (required)>' 
    from script/rails:6:in `require' 
    from script/rails:6:in `<main>' 

我想我已經修復了這個問題，至少4倍，而無需實際知道是什麼原因造成的或者我做了什麼來解決它......是什麼原因造成的？

下面是我解決這個問題的方法： 1）簽出我當前分支中最舊的提交（稱爲'paperclip'）。 2）捆綁安裝（安裝所有gem到bundler /出於某種原因） 3）Git add。和/或git存儲以檢出 後刪除我剛剛對未命名分支所做的更改。4）再次檢出初始分支（'paperclip'）並運行rails服務器。 5）它的工作原理。

我不知道什麼是造成這個或什麼修復它，因爲貌似我沒有做任何事情的任何情況下。請幫忙！

Answer 1

看起來像'bcrypt_ext'gem沒有安裝在您的服務器上！

確保在更新源代碼後運行bundle install，例如，開關支路，或拉動新的代碼修改..

Answer 2

不知道爲什麼，但這個工作：

cd [path to your gems folder]/gems/bcrypt-ruby-3.0.1/ext/mri 
ruby extconf.rb 
make 
sudo make install 

這裏找到：no such file to load -- bcrypt_ext (via devise)