Strange error in rails - missing helper

Question

I am not sure , but this might be associated with a crashed computer. After restarting (after the crash) I get a missing helper error where the helper name is wrong. Switching branches has no effect on the outcome.

The error is:

Missing helper file helpers//users/xxxx/sites/xxxx/app/helpers/accounts_helper.rb_helper.rb

Ive tried updating gems, uninstalled rails and reinstalled, checked helper names and anywhere helpers are included. Ive also reviewed git logs and checked recently changed code. No luck.

Stack Trace

Started GET "/" for 127.0.0.1 at 2015-01-09 17:53:57 -0700
  ActiveRecord::SchemaMigration Load (1.1ms)  SELECT "schema_migrations".* FROM "schema_migrations"

AbstractController::Helpers::MissingHelperError - Missing helper file helpers//users/xxxx/sites/xxxx/app/helpers/accounts_helper.rb_helper.rb:
  actionpack (4.2.0) lib/abstract_controller/helpers.rb:151:in `rescue in block in modules_for_helpers'
  actionpack (4.2.0) lib/abstract_controller/helpers.rb:148:in `block in modules_for_helpers'
  actionpack (4.2.0) lib/abstract_controller/helpers.rb:144:in `modules_for_helpers'
  actionpack (4.2.0) lib/action_controller/metal/helpers.rb:93:in `modules_for_helpers'
  actionpack (4.2.0) lib/abstract_controller/helpers.rb:108:in `helper'
  actionpack (4.2.0) lib/action_controller/railties/helpers.rb:17:in `inherited'
  app/controllers/application_controller.rb:1:in `<top (required)>'
  activesupport (4.2.0) lib/active_support/dependencies.rb:457:in `block in load_file'
  activesupport (4.2.0) lib/active_support/dependencies.rb:647:in `new_constants_in'
  activesupport (4.2.0) lib/active_support/dependencies.rb:456:in `load_file'
  activesupport (4.2.0) lib/active_support/dependencies.rb:354:in `require_or_load'
  activesupport (4.2.0) lib/active_support/dependencies.rb:494:in `load_missing_constant'
  activesupport (4.2.0) lib/active_support/dependencies.rb:184:in `const_missing'
  app/controllers/pages_controller.rb:1:in `<top (required)>'
  activesupport (4.2.0) lib/active_support/dependencies.rb:457:in `block in load_file'
  activesupport (4.2.0) lib/active_support/dependencies.rb:647:in `new_constants_in'
  activesupport (4.2.0) lib/active_support/dependencies.rb:456:in `load_file'
  activesupport (4.2.0) lib/active_support/dependencies.rb:354:in `require_or_load'
  activesupport (4.2.0) lib/active_support/dependencies.rb:494:in `load_missing_constant'
  activesupport (4.2.0) lib/active_support/dependencies.rb:184:in `const_missing'
  activesupport (4.2.0) lib/active_support/inflector/methods.rb:261:in `block in constantize'
  activesupport (4.2.0) lib/active_support/inflector/methods.rb:259:in `constantize'
  activesupport (4.2.0) lib/active_support/dependencies.rb:566:in `get'
  activesupport (4.2.0) lib/active_support/dependencies.rb:597:in `constantize'
  actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:69:in `controller_reference'
  actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:59:in `controller'
  actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:38:in `serve'
  actionpack (4.2.0) lib/action_dispatch/journey/router.rb:43:in `block in serve'
  actionpack (4.2.0) lib/action_dispatch/journey/router.rb:30:in `serve'
  actionpack (4.2.0) lib/action_dispatch/routing/route_set.rb:802:in `call'
  bullet (4.14.0) lib/bullet/rack.rb:10:in `call'
  meta_request (0.3.4) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
  meta_request (0.3.4) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
  rack (1.6.0) lib/rack/etag.rb:24:in `call'
  rack (1.6.0) lib/rack/conditionalget.rb:25:in `call'
  rack (1.6.0) lib/rack/head.rb:13:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/flash.rb:260:in `call'
  rack (1.6.0) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.6.0) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/cookies.rb:560:in `call'
  activerecord (4.2.0) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.2.0) lib/active_record/connection_adapters/abstract/connection_pool.rb:647:in `call'
  activerecord (4.2.0) lib/active_record/migration.rb:378:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.2.0) lib/active_support/callbacks.rb:88:in `_run_callbacks'
  activesupport (4.2.0) lib/active_support/callbacks.rb:734:in `_run_call_callbacks'
  activesupport (4.2.0) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (4.2.0) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/reloader.rb:73:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
  better_errors (2.1.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (2.1.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (2.1.0) lib/better_errors/middleware.rb:57:in `call'
  rack-contrib (1.2.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.3.4) lib/meta_request/middlewares/headers.rb:16:in `call'
  web-console (2.0.0) lib/action_dispatch/debug_exceptions.rb:18:in `middleware_call'
  web-console (2.0.0) lib/action_dispatch/debug_exceptions.rb:13:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.2.0) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.2.0) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.2.0) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.2.0) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.2.0) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.6.0) lib/rack/methodoverride.rb:22:in `call'
  rack (1.6.0) lib/rack/runtime.rb:18:in `call'
  activesupport (4.2.0) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
  rack (1.6.0) lib/rack/lock.rb:17:in `call'
  actionpack (4.2.0) lib/action_dispatch/middleware/static.rb:113:in `call'
  rack (1.6.0) lib/rack/sendfile.rb:113:in `call'
  rack-mini-profiler (0.9.2) lib/mini_profiler/profiler.rb:300:in `call'
  railties (4.2.0) lib/rails/engine.rb:518:in `call'
  railties (4.2.0) lib/rails/application.rb:164:in `call'
  rack (1.6.0) lib/rack/lock.rb:17:in `call'
  rack (1.6.0) lib/rack/content_length.rb:15:in `call'
  rack (1.6.0) lib/rack/handler/webrick.rb:89:in `service'
  /Users/Hank/.rvm/rubies/ruby-2.2.0-rc1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
  /Users/Hank/.rvm/rubies/ruby-2.2.0-rc1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
  /Users/Hank/.rvm/rubies/ruby-2.2.0-rc1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'

Answer 1

I'm running 2.2.0 and did as @Rob said and found that it was my the apps root directory that had the problem since it had a capitalized name. I'm also not keeping the app in the Sites directory but another sibling directory.

Answer 2

For me, the folder 'sites' only needed to be renamed, not the entire directory.

from my user root directory I did this...

mv sites sites1
mv sites1 sites

Answer 3

I got this error after creating a helpers directory for the first time.

The problem went away after running spring stop and trying again.

Answer 4

The problem seems to have been introduced in the latest version of ruby, ruby 2.2.0.

Try this experiment:

in rails console/or irb:

[1] pry(main)>File.expand_path ("./") 
=> "/users/xxxx/Sites/xxxx"

and in the terminal window:

]$ pwd
/users/xxxx/sites/xxxx

See the different case? If you get that, then deep in the bowels of active support a regex goes south. One fix is to remove the "sites" directory and recreate. It might also work to rename the sites directory using the finder, as rename it to "foobar" and then back to "sites".

hth.

(from this page in Japan) http://translate.google.com/translate?hl=en&sl=ja&u=http://d.hatena.ne.jp/jiikko/20150108&prev=search

And when I was debugging this with another person, it was enough to have a mixed case directory name in the path. We renamed it to 'farknerd' and then back the original, except all lower case, and it worked.

Answer 5

I had the same problem, apparently related to dropbox, but not case sensitive as others have suggested.

Following @Rob's answer, the output of [1] pry(main)>File.expand_path ("./") resulted in:

/Users/xxxx/dropbox/xxxx

and the output of ]$ pwd also resulted in:

/Users/xxxx/dropbox/xxxx

Following @Beengie's instructions, from my Users root directory, I did:

mv Dropbox Dropbox1
mv Dropbox1 Dropbox

This solves the problem for me -- until I reboot, at which point I have to perform the operation again. I'm still looking for a permanent fix.

Answer 6

I had the same problem, but NO user-created directories that had uppercase letter in them... only /Users.

I tried upgrading to ruby 2.2.1 - this did not fix it.

I very hesitantly fixed it by doing the same case-sensitive "fix" on my /Users directory:

cd /
sudo mv Users users1
sudo mv users1 users

I have yet to see if that breaks anything else....