# Cache\_sweeper undefined for controllers

**URL:** <https://www.ruby-forum.com/t/cache-sweeper-undefined-for-controllers/155476>\
**Category:** Rails\
**Created:** [December 12, 2008, 7:12am UTC](https://www.ruby-forum.com/t/cache-sweeper-undefined-for-controllers/155476 "2008-12-12T07:12:40Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![spiceee](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/53a042/32.png) [@spiceee](https://www.ruby-forum.com/u/spiceee)\
**Post date:** [December 12, 2008, 7:12am UTC](https://www.ruby-forum.com/t/cache-sweeper-undefined-for-controllers/155476/1 "2008-12-12T07:12:40Z")

</div>

Any clues on why I’m getting cache\_sweeper undefined to any controller  
on Rails 2.1?

NoMethodError (undefined method `cache_sweeper' for CommentsController:Class): /app/controllers/comments_controller.rb:5 /vendor/rails/activesupport/lib/active_support/dependencies.rb:216:in`load\_without\_new\_constant\_marking’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:216:in  
`load_file' /vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in`new\_constants\_in’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:215:in  
`load_file' /vendor/rails/activesupport/lib/active_support/dependencies.rb:96:in`require\_or\_load’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:261:in  
`load_missing_constant' /vendor/rails/activesupport/lib/active_support/dependencies.rb:468:in`const\_missing\_not\_from\_s3\_library’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/aws-s3-0.5.1/lib/aws/s3/extensions.rb:174:in  
`const_missing' /vendor/rails/activesupport/lib/active_support/dependencies.rb:480:in`const\_missing’  
/vendor/rails/activesupport/lib/active\_support/inflector.rb:285:in  
`constantize' /vendor/rails/activesupport/lib/active_support/inflector.rb:284:in`each’  
/vendor/rails/activesupport/lib/active\_support/inflector.rb:284:in  
`constantize' /vendor/rails/activesupport/lib/active_support/core_ext/string/inflections.rb:143:in`constantize’  
/vendor/rails/actionpack/lib/action\_controller/routing/route\_set.rb:387:in  
`recognize' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:148:in`handle\_request’  
/vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:107:in  
`dispatch' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in`synchronize’  
/vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:104:in  
`dispatch' /vendor/rails/actionpack/lib/action_controller/dispatcher.rb:120:in`dispatch\_cgi’  
/vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:35:in  
`dispatch' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:76:in`process’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/…/lib/mongrel/rails.rb:74:in  
`synchronize' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/../lib/mongrel/rails.rb:74:in`process’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in  
`process_client' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in`each’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in  
`process_client' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`run’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`initialize' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in`new’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in  
`run' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in`initialize’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in  
`new' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in`run’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in  
`run' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in`each’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in  
`run' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in`run’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/lib/mongrel/command.rb:212:in  
`run' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281 /vendor/rails/activesupport/lib/active_support/dependencies.rb:503:in`load’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:503:in  
`load' /vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in`new\_constants\_in’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:503:in  
`load' /vendor/rails/railties/lib/commands/servers/mongrel.rb:64 /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`gem\_original\_require’  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`require' /vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in`require’  
/vendor/rails/activesupport/lib/active\_support/dependencies.rb:355:in  
`new_constants_in' /vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in`require’  
/vendor/rails/railties/lib/commands/server.rb:39  
/opt/ruby-enterprise-1.8.6-20080810/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in  
`gem_original_require' /opt/ruby-enterprise-1.8.6-20080810/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27:in`require’  
script/server:3

-Fabio.