标题里差不多。我和其他人一起做一个项目，然后将 git repo 克隆到我的计算机上，添加了一个新控制器，然后想得更好，于是跑了：
rails destroy controller requests
（requests 是控制器的名称），只是得到这个无穷无尽的错误信息：
/Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:181:in `default_controller_and_action': missing :controller (ArgumentError)
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:78:in `normalize_options!'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:61:in `initialize'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1304:in `new'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1304:in `add_route'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1284:in `decomposed_match'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `block in match'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `each'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:1270:in `match'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:507:in `map_method'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/mapper.rb:469:in `get'
from /Users/sashafklein/rails_projects/meatup/config/routes.rb:3:in `block in <top (required)>'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `instance_exec'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:282:in `eval_block'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/actionpack-3.2.8/lib/action_dispatch/routing/route_set.rb:260:in `draw'
from /Users/sashafklein/rails_projects/meatup/config/routes.rb:1:in `<top (required)>'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `load'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `block in load'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:236:in `load_dependency'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/dependencies.rb:245:in `load'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `each'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `call'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/activesupport-3.2.8/lib/active_support/file_update_checker.rb:78:in `execute'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:27:in `updater'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application/finisher.rb:66:in `block in <module:Finisher>'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/initializable.rb:30:in `run'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `each'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application.rb:136:in `initialize!'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/sashafklein/rails_projects/meatup/config/environment.rb:5:in `<top (required)>'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application.rb:103:in `require'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/application.rb:103:in `require_environment!'
from /Users/sashafklein/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.8/lib/rails/commands.rb:25:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
它以前工作过，所以发生了什么？我可能需要重新安装被覆盖的东西吗？
另外，有什么想法为什么在粘贴我正在学习的rails教程的所有内容时出错？我不记得该文本在我的文件中的任何位置？
谢谢