爲什麼rails會迫使我使用bundle exec？

Question

我想用「回扣路線」

運行我的rake命令，但軌道生成以下錯誤

** Invoke routes (first_time) 
** Invoke environment (first_time) 
** Execute environment 
rake aborted! 
uninitialized constant ActiveAdmin 
/Users/aaalsubaie/Sites/Posnegs/config/initializers/active_admin.rb:1 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/engine.rb:588 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/engine.rb:587:in `each' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/engine.rb:587 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `instance_exec' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/initializable.rb:30:in `run' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/initializable.rb:55:in `run_initializers' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `each' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/initializable.rb:54:in `run_initializers' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:136:in `initialize!' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `send' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/Users/aaalsubaie/Sites/Posnegs/config/environment.rb:5 
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `gem_original_require' 
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:36:in `require' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:103:in `require_environment!' 
/Library/Ruby/Gems/1.8/gems/railties-3.2.3/lib/rails/application.rb:292:in `initialize_tasks' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `execute' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `invoke_with_call_chain' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:176:in `invoke_prerequisites' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `each' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `invoke_prerequisites' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:157:in `invoke_with_call_chain' 
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `top_level' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `run' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run' 
/Library/Ruby/Gems/1.8/gems/rake-0.9.2.2/bin/rake:33 
/usr/bin/rake:23:in `load' 
/usr/bin/rake:23 
Tasks: TOP => routes => environment 

奇怪的是，當我運行「捆綁高管耙路線」
它正常工作！我面對這個錯誤在我的開發/生產ENV寶石上的特定版本

Answer 1

依賴創造一個應用程序發現它需要一個不同的人之前寶石的錯誤版本可以加載一個雞和蛋的問題。 bundle exec有助於右腳下車。請參閱http://yehudakatz.com/2011/05/30/gem-versioning-and-bundler-doing-it-right/

Answer 2

如果您使用rvm，則可以使用bundle install --binstubs，然後您不必再執行bundle exec。詳細信息請參見this post。

不要忘記bin目錄添加到您的gitignore文件。