我有一个rails应用程序使用Mongoid 3运行在Heroku.我刚刚更新它使用Unicorn.当我尝试部署到Heroku我得到以下错误：
@H_404_2@Running: rake assets:precompile
rake aborted!
undefined method `match' for nil:NilClass
/tmp/build_3nnbzpfmnjpns/vendor/bundle/ruby/1.9.1/gems/mongoid-3.0.21/lib/mongoid/sessions/mongo_uri.rb:49:in `initialize'
完整的堆栈跟踪可以在http://pastebin.com/8YcJHEmS找到
但是,如果我从我的Gemfile中删除Unicorn,则资产编译成功.查看Mongoid代码,我可以看到,当mongoid.yml文件被解析时,会发生错误,但是我无法弄清楚Unicorn为什么会导致失败.
我的mongoid.yml文件如下所示：
和我的宝石：
@H_404_2@source 'https://rubygems.org' ruby '1.9.3' gem 'rails','3.2.11' gem 'thin' group :assets do gem 'sass-rails','~> 3.2' gem 'coffee-rails','~> 3.2' gem 'uglifier','>= 1.0.3' gem "twitter-bootstrap-rails",'>=2.1.8' gem "bootstrap_form" end gem "jquery-rails" gem 'jquery-ui-rails',"3.0.1" gem 'newrelic_rpm' gem "httparty" gem "resque" gem "resque-loner" gem "unicorn","4.4.0" gem "mongoid","~> 3.0.0" gem "mongo","~> 1.7.0" gem "bson","~> 1.7" gem "bson_ext","~> 1.7" gem 'less-rails',"~> 2.2" gem 'therubyracer','>= 0.11.1' gem 'libv8','~> 3.11.8' gem 'devise','~> 2.1.2' gem 'devise_invitable','~> 1.0.0' gem 'bootstrap_form' gem 'font-awesome-rails' gem 'omniauth' gem 'omniauth-facebook' gem 'kaminari' gem 'mongoid_search'你有什么想法是什么原因造成的？