# A fix for an annoying bug

**URL:** <https://www.ruby-forum.com/t/a-fix-for-an-annoying-bug/91042>\
**Category:** Rails\
**Created:** [April 4, 2007, 1:04am UTC](https://www.ruby-forum.com/t/a-fix-for-an-annoying-bug/91042 "2007-04-04T01:04:16Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![rogerdpack](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/45deac/32.png) [@rogerdpack](https://www.ruby-forum.com/u/rogerdpack)\
**Post date:** [April 4, 2007, 1:04am UTC](https://www.ruby-forum.com/t/a-fix-for-an-annoying-bug/91042/1 "2007-04-04T01:04:16Z")

</div>

so…say you setup your models and they work well except on one certain  
page?

It replies with:

uninitialized constant UserBlendedCastController::Filter

What may be the problem is that if you use Dir.chdir then it may not  
longer be finding your app models. Good luck!

-Roger

Full stack trace for this very odd bug which would ideally be more  
verbosely reported:

RAILS\_ROOT: ./script/…/config/…  
Application Trace | Framework Trace | Full Trace

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active\_support/dependencies.rb:477:in  
`const_missing' #{RAILS_ROOT}/app/controllers/user_blended_cast_controller.rb:120:in`download’  
#{RAILS\_ROOT}/app/controllers/user\_blended\_cast\_controller.rb:102:in  
`download’

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active\_support/dependencies.rb:477:in  
`const_missing' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/associations/association_proxy.rb:123:in`each’  
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active\_record/associations/association\_proxy.rb:123:in  
`send' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/associations/association_proxy.rb:123:in`method\_missing’  
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active\_record/associations/has\_many\_association.rb:98:in  
`method_missing' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:in`send’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:1095:in  
`perform_action_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:in`call\_filter’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/filters.rb:634:in  
`call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:in`perform\_action\_without\_benchmark’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/benchmarking.rb:66:in  
`perform_action_without_rescue' c:/ruby/lib/ruby/1.8/benchmark.rb:293:in`measure’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/benchmarking.rb:66:in  
`perform_action_without_rescue' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:in`perform\_action’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:430:in  
`send' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in`process\_without\_filters’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/filters.rb:624:in  
`process_without_session_management_support' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in`process’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:330:in  
`process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in`dispatch’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb:113:in  
`handle_dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in`service’  
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in`run’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:95:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `each' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:82:in`start’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb:63:in  
`dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/webrick.rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in`require’  
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active\_support/dependencies.rb:342:in  
`new_constants_in' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in`require’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39  
c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
script/server:3

c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active\_support/dependencies.rb:477:in  
`const_missing' #{RAILS_ROOT}/app/controllers/user_blended_cast_controller.rb:120:in`download’  
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active\_record/associations/association\_proxy.rb:123:in  
`each' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/associations/association_proxy.rb:123:in`send’  
c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active\_record/associations/association\_proxy.rb:123:in  
`method_missing' c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/active_record/associations/has_many_association.rb:98:in`method\_missing’  
#{RAILS\_ROOT}/app/controllers/user\_blended\_cast\_controller.rb:102:in  
`download' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:1095:in`send’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:1095:in  
`perform_action_without_filters' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:632:in`call\_filter’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/filters.rb:634:in  
`call_filter' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/filters.rb:619:in`perform\_action\_without\_benchmark’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/benchmarking.rb:66:in  
`perform_action_without_rescue' c:/ruby/lib/ruby/1.8/benchmark.rb:293:in`measure’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/benchmarking.rb:66:in  
`perform_action_without_rescue' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/rescue.rb:83:in`perform\_action’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:430:in  
`send' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:430:in`process\_without\_filters’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/filters.rb:624:in  
`process_without_session_management_support' c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/session_management.rb:114:in`process’  
c:/ruby/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action\_controller/base.rb:330:in  
`process' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in`dispatch’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb:113:in  
`handle_dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick_server.rb:79:in`service’  
c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' c:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in`run’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' c:/ruby/lib/ruby/1.8/webrick/server.rb:95:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `each' c:/ruby/lib/ruby/1.8/webrick/server.rb:92:in`start’  
c:/ruby/lib/ruby/1.8/webrick/server.rb:23:in `start' c:/ruby/lib/ruby/1.8/webrick/server.rb:82:in`start’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb:63:in  
`dispatch' c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/webrick.rb:59 c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`require' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in`require’  
c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active\_support/dependencies.rb:342:in  
`new_constants_in' c:/ruby/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/active_support/dependencies.rb:495:in`require’  
c:/ruby/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb:39  
c:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' c:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’