I just cloned a repository I was working on from another computer. When I try to do a database migration by running 'rake db:migrate' I get the following error:
AbstractController::Helpers::MissingHelperError:
Missing helper file helpers//users/psmith/projects/clie/projectlion/app/helpers/application_helper.rb_helper.rb
I have already tried the top answer here: Rails: AbstractController::Helpers::MissingHelperError - Missing helper file application_helper.rb_helper.rb
It says to do the following in the terminal:
cd ~
mv projects projects1
mv projects1 projects
I have also tried:
sudo ln -s Users users
But this does not work for me. What should I do?
UPDATE:
Here is my stacktrace:
ps-MacBook-Pro:projectlion psmith$ rake db:migrate
rake aborted!
AbstractController::Helpers::MissingHelperError: Missing helper file helpers//users/psmith/projects/clie/projectlion/app/helpers/application_helper.rb_helper.rb
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:154:in `rescue in block in modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:151:in `block in modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:147:in `map!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:147:in `modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_controller/metal/helpers.rb:93:in `modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:111:in `helper'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_controller/railties/helpers.rb:17:in `inherited'
/Users/psmith/projects/clie/projectlion/app/controllers/application_controller.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:238:in `const_get'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:238:in `block in constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `each'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `inject'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/core_ext/string/inflections.rb:66:in `constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/devise-fea2b95c5fde/app/controllers/devise_controller.rb:2:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/devise-fea2b95c5fde/app/controllers/devise/sessions_controller.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:55:in `<module:Devise>'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:6:in `<module:ActiveAdmin>'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:5:in `<top (required)>'
/Users/psmith/projects/clie/projectlion/config/routes.rb:2:in `block in <top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `instance_exec'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `eval_block'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:315:in `draw'
/Users/psmith/projects/clie/projectlion/config/routes.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `block in load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `each'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `load_paths'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:16:in `reload!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:26:in `block in updater'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `call'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `execute'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:27:in `updater'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/finisher.rb:71:in `block in <module:Finisher>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `instance_exec'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `run'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:55:in `block in run_initializers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:54:in `run_initializers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:300:in `initialize!'
/Users/psmith/projects/clie/projectlion/config/environment.rb:5:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `block in require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:276:in `require_environment!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:379:in `block in run_tasks_blocks'
/Users/psmith/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
/Users/psmith/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'
LoadError: No such file to load -- /users/psmith/projects/clie/projectlion/app/helpers/application_helper.rb_helper
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:307:in `depend_on'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:225:in `require_dependency'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:152:in `block in modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:147:in `map!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:147:in `modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_controller/metal/helpers.rb:93:in `modules_for_helpers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/abstract_controller/helpers.rb:111:in `helper'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_controller/railties/helpers.rb:17:in `inherited'
/Users/psmith/projects/clie/projectlion/app/controllers/application_controller.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:238:in `const_get'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:238:in `block in constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `each'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `inject'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/inflector/methods.rb:236:in `constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/core_ext/string/inflections.rb:66:in `constantize'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/devise-fea2b95c5fde/app/controllers/devise_controller.rb:2:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/devise-fea2b95c5fde/app/controllers/devise/sessions_controller.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:443:in `block in load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:633:in `new_constants_in'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:442:in `load_file'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:342:in `require_or_load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:480:in `load_missing_constant'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:180:in `const_missing'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:55:in `<module:Devise>'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:6:in `<module:ActiveAdmin>'
/Users/psmith/.rvm/gems/ruby-2.2.0/bundler/gems/activeadmin-3f916d6bee73/lib/active_admin/devise.rb:5:in `<top (required)>'
/Users/psmith/projects/clie/projectlion/config/routes.rb:2:in `block in <top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `instance_exec'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:337:in `eval_block'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/actionpack-4.1.4/lib/action_dispatch/routing/route_set.rb:315:in `draw'
/Users/psmith/projects/clie/projectlion/config/routes.rb:1:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `block in load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:241:in `load'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `each'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:40:in `load_paths'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:16:in `reload!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:26:in `block in updater'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `call'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/file_update_checker.rb:75:in `execute'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:27:in `updater'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/routes_reloader.rb:7:in `execute_if_updated'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application/finisher.rb:71:in `block in <module:Finisher>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `instance_exec'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:30:in `run'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:55:in `block in run_initializers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/initializable.rb:54:in `run_initializers'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:300:in `initialize!'
/Users/psmith/projects/clie/projectlion/config/environment.rb:5:in `<top (required)>'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `block in require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:232:in `load_dependency'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/activesupport-4.1.4/lib/active_support/dependencies.rb:247:in `require'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:276:in `require_environment!'
/Users/psmith/.rvm/gems/ruby-2.2.0/gems/railties-4.1.4/lib/rails/application.rb:379:in `block in run_tasks_blocks'
/Users/psmith/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
/Users/psmith/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'
user5011892
I was having the same challenge and after reading all of the answers and finding no success. This is how I fixed the error:
Open Finder and checked the path to my code. My path was myMac/Code/my apps.
I changed the Code to code and that fixed the error.
Now my path is myMac/code/my apps.
I had the same problem starting yesterday, and I just fixed it. The error started for me after I installed the command line tools for Xcode 6.3, and reverting back to command line tools for Xcode 6.2 resolved the issue. Here's where you can download the DMG for the previous version: https://developer.apple.com/downloads/index.action
It seems to be some sort of conflict between Ruby 2.2.* and Xcode 6.3 command line tools - hopefully it'll get fixed properly soon!
Edmund Lee
I have this same issue. When I run rake test.
As suggested in this Strange error in rails - missing helper.
Try this in irb or pry:
pry(main)> File.expand_path('./')
You will get something like this => "/users/xxxx/Sites/xxxx"
Then run pwd in your terminal and compare the path difference.
You will get something like this /users/xxxx/sites/xxxx.
If this is the case, the above method you tried will work. It due to possible ruby 2.2.0 or rails core issue where it messes up and capitalize the site name. So in a case sensitive OS like linux or mac, it won't find the path.
But if this is not the case for you, just like me. I suggest you check what version of ruby you are using. I was using ruby 2.2.0, then switch 2.2.1. And rails 4.2.0.
Then I switch to ruby 2.1.5. rails version stays. Problem was solved. My guess is that was a problem with ruby?..
in my case i was using windows. Using Git shell, i kept getting this error while trying to install the gem administrate from thoughtbot. The command that kept giving me the error,"AbstractController::Helpers::MissingHelperError", was:
$ rails generate administrate:install
I did not rename my folder's to lowercase as many answers have suggested. I instead used the window's cmd. It worked perfectly.
来源：https://stackoverflow.com/questions/28837717/ruby-on-rails-abstractcontrollerhelpersmissinghelpererror-missing-helper-fi