升级后，当我尝试登录我的 Rails 应用程序时，我得到以下信息：
NameError in ApplicationsController#index
未初始化的常量 AssignmentsPresenter::OrderedHash
RAILS_ROOT：/Users/jasonbodak
应用程序跟踪 | 框架跟踪 | 全跟踪
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/activesupport-2.3.11/lib/active_support/dependencies.rb:131:in `const_missing'
/Users/jasonbodak/janova/janova/lib/assignments_presenter.rb:4:in `present'
/Users/jasonbodak/janova/janova/app/controllers/applications_controller.rb:12:in `index'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:1333:in `send'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:1333:in `perform_action_without_filters'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/filters.rb:617:in `call_filters'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/activesupport-2.3.11/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/activesupport-2.3.11/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/rescue.rb:160:in `perform_action_without_flash'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/flash.rb:151:in `perform_action'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:532:in `send'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:532:in `process_without_filters'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/filters.rb:606:in `process'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:391:in `process'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/base.rb:386:in `call'
/Users/jasonbodak/.rvm/gems/ree-1.8.7-2011.03@janova-local_app/gems/actionpack-2.3.11/lib/action_controller/routing/route_set.rb:438:in `call'
要求
参数：
None
显示会话转储响应
标题：
{"Content-Type"=>"",
"Cache-Control"=>"no-cache"}
这对任何人都意味着什么？谢谢。