MissingSourceFile沒有這樣的文件來加載 - 串

我使用導軌安裝，當我加入application_helper.rb require 'string'，它顯示了以下錯誤，MissingSourceFile沒有這樣的文件來加載 - 串
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
app/helpers/application_helper.rb:1 
app/controllers/application.rb:4 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_without_new_constant_marking' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:202:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:94:in `require_or_load' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:60:in `depend_on' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:442:in `require_dependency' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:176:in `default_helper_module!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:191:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:191:in `inherited' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_without_new_constant_marking' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:202:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:94:in `require_or_load' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:60:in `depend_on' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:442:in `require_dependency' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:141:in `prepare_application' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:178:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:178:in `run_callbacks' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `run_callbacks' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:114:in `dispatch' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:76:in `process' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `synchronize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `process' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:159:in `process_client' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `process_client' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `initialize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `new' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `initialize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `new' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:282:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:128:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/command.rb:212:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:281 
E:/rails/INSTAN~1.0-W/ruby/bin/mongrel_rails:19:in `load' 
E:/rails/INSTAN~1.0-W/ruby/bin/mongrel_rails:19 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `gem_original_require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:496:in `require' 
app/helpers/application_helper.rb:1 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_without_new_constant_marking' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:202:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:94:in `require_or_load' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:60:in `depend_on' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:442:in `require_dependency' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:176:in `default_helper_module!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:191:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/helpers.rb:191:in `inherited' 
app/controllers/application.rb:4 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_without_new_constant_marking' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:203:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:342:in `new_constants_in' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:202:in `load_file' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:94:in `require_or_load' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:60:in `depend_on' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.rb:442:in `require_dependency' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:141:in `prepare_application' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:178:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:178:in `run_callbacks' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `send!' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:175:in `run_callbacks' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:114:in `dispatch' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in `dispatch_cgi' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:in `dispatch' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:76:in `process' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `synchronize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/rails.rb:74:in `process' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:159:in `process_client' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:158:in `process_client' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `initialize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `new' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:285:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `initialize' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `new' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel.rb:268:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:282:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `each' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/configurator.rb:281:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:128:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/command.rb:212:in `run' 
E:/rails/INSTAN~1.0-W/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:281 
E:/rails/INSTAN~1.0-W/ruby/bin/mongrel_rails:19:in `load' 
E:/rails/INSTAN~1.0-W/ruby/bin/mongrel_rails:19 
This error occurred while loading the following files: 
    string
來源
2011-03-07 juliet
'String'是ruby核心的一部分，已經在Rails中加載（和擴展）了。你不需要在任何地方需要它。你想達到什麼目的？ – idlefingers 2011-03-07 09:36:13
我想使用html_safe方法的字符串，但我得到這個錯誤未定義的方法'html_safe'爲＃<字符串：0x3e22f04> – juliet 2011-03-07 12:17:44
你到底想達到什麼目的？
在Ruby中沒有稱爲「字符串」的寶石或標準模塊（字符串是內置類，您不需要任何東西就可以使用它）。
它看起來像所有按設計工作。
來源
2011-03-07 09:37:25
我想使用字符串的html_safe方法 – juliet 2011-03-07 12:15:40
這就是你需要的Active Support。 – 2011-03-09 20:37:28
在ruby中沒有什麼要求'string'。爲了使用字符串，你可以直接使用它，而不用擔心錯誤。 Thanx
來源
2011-03-07 09:45:11 Bijendra
MissingSourceFile沒有這樣的文件來加載 - 串

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