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红宝石我开始创建一个应用程序迁移命令不工作导轨和sass导轨到gem 'rails', '~> 4.0.0'和gem 'sass-rails', '~> 4.0.0'。分贝：安装CommunityEngine，对Rails插件
然后我创建了一个新的application_config.rb并添加configatron.community_name = "appfog"
我删除Gemfile.lock的和运行bundle install --binstubs。它说旁边运行bin/rake community_engine:install:migrations。
最后当我运行bin/rake db:migrate，它给了我一堆错误
rake aborted!
NoMethodError: undefined method `configure' for #<Appfog::Application:0x007f9daa9a7f00>
/Users/sarthak/Desktop/Appfog/config/environments/development.rb:1:in `<top (required)>'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:591:in `block (2 levels) in <class:Engine>'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:590:in `each'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/engine.rb:590:in `block in <class:Engine>'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `each'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:44:in `tsort_each_child'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/Users/sarthak/Desktop/Appfog/config/environment.rb:5:in `<top (required)>'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/Library/Ruby/Gems/2.0.0/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/Library/Ruby/Gems/2.0.0/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)
请帮我找到我的错误。我已经检查了所有的论坛，但没有得到任何可能的解决方案。