ruby-on-rails - Rails: AbstractController::Helpers::MissingHelperError - 缺少帮助程序文件 application_helper.rb_helper.rb

Question

找不到任何对我有帮助的资源!当我尝试“rails s”并转到应用程序的任何页面时；它向我显示此错误页面，说我缺少帮助程序文件。

我认为它在我的台式机上是本地的，因为我最近在笔记本电脑上对应用程序做了一些工作。我从笔记本电脑上推送，应用程序在 Heroku 上运行良好，并在该机器上本地运行，零问题。我添加了一项功能，可以使用 Carrierwave、Mini_Magick 和 Fog 将公司 Logo 图像上传到 Amazon S3。

到目前为止我尝试过的事情:我已经删除了该应用程序并将其克隆回这台机器。我尝试过 Brew 卸载/安装 imagemagick，并在克隆应用程序后完成了所有基础操作，例如捆绑安装、rake db:migrate。还是没有运气..

这是我在页面上收到的错误代码以及完整的跟踪:

AbstractController::Helpers::MissingHelperError in PagesController#dashboard
Missing helper file helpers//users/jamesfend/sites/feedbackz/app/helpers/application_helper.rb_helper.rb

Extracted source (around line #1):
1 class ApplicationController < ActionController::Base    
2 # Prevent CSRF attacks by raising an exception.
3 # For APIs, you may want to use :null_session instead.
4 protect_from_forgery with: :exception

完整跟踪

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 `map!'
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 `load'
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 `load'
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 `const_get'
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 `each'
activesupport (4.2.0) lib/active_support/inflector/methods.rb:259:in `inject'
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 `each'
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'
warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
warden (1.2.3) lib/warden/manager.rb:34:in `catch'
warden (1.2.3) lib/warden/manager.rb:34: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 `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'
actionpack (4.2.0) lib/action_dispatch/middleware/debug_exceptions.rb:17: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'
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/jamesfend/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
/Users/jamesfend/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
/Users/jamesfend/.rvm/rubies/ruby-2.2.0/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'

页面 Controller

class PagesController < ApplicationController

  def dashboard
    @title = 'Feedbackz by Amazio Labs'
    @header_title = 'Dashboard'
  end

  def billing
    @title = 'Billing & Plans - Feedbackz by Amazio Labs'
    @header_title = 'Billing & Plans'    
    @user = User.find(current_user.id)
  end

  def contact
    @title = 'Contact - Feedbackz by Amazio Labs'
    @header_title = 'Contact Us'    
  end

  def faq
    @title = 'FAQ - Feedbackz by Amazio Labs'
    @header_title = 'Frequently Asked Questions'    
  end

  def invoices
    @title = 'Invoices - Feedbackz by Amazio Labs'
    @header_title = 'Invoices'    
  end  

  def videos
    @title = 'Videos - Feedbackz by Amazio Labs'
    @header_title = 'Helpful Videos'    
  end

  def schedule
    @title = 'Schedule - Feedbackz by Amazio Labs'
    @header_title = 'Schedule of Pending Sends'    
  end

end

Answer 1

这对我有用:

cd ~
mv sites tmpsites
mv tmpsites sites

我也这样做了，但不确定是否需要:

cd /
sudo ln -s Users users

奇怪的是，我看不到小写的 users 符号链接(symbolic link)，但 ls/users 和 ls/Users 都可以工作。