我在heroku上部署了一个应用程序，其中mongoid-paperclip用于文件管理。一切都在本地工作，但当我把它推到Heroku时，它就崩溃了。
以下是LogSets中的日志：
1 Feb 2016 12:04:09.445 2016-02-01 10:04:09.166406+00:00 app web.1 - - /app/vendor/bundle/ruby/2.0.0/gems/paperclip-4.3.3/lib/paperclip/deprecations.rb:14:in `active_record_version': uninitialized constant ActiveRecord (NameError)
from /app/vendor/bundle/ruby/2.0.0/gems/paperclip-4.3.3/lib/paperclip/deprecations.rb:8:in `check'
from /app/vendor/bundle/ruby/2.0.0/gems/paperclip-4.3.3/lib/paperclip.rb:195:in `has_attached_file'
from /app/vendor/bundle/ruby/2.0.0/gems/mongoid-paperclip-0.0.10/lib/mongoid_paperclip.rb:103:in `has_mongoid_attached_file'
from /app/app/models/location.rb:26:in `<class:Location>'
from /app/app/models/location.rb:1:in `<top (required)>'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:472:in `block (2 levels) in eager_load!'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:471:in `each'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:471:in `block in eager_load!'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:469:in `each'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:469:in `eager_load!'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/engine.rb:346:in `eager_load!'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/application/finisher.rb:56:in `each'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `instance_exec'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/initializable.rb:30:in `run'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/initializable.rb:55:in `block in run_initializers'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/initializable.rb:54:in `run_initializers'
from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.2.5/lib/rails/application.rb:352:in `initialize!'
from /app/config/environment.rb:5:in `<top (required)>'
from config.ru:3:in `require'
from config.ru:3:in `block in <main>'
from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `instance_eval'
from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/builder.rb:55:in `initialize'
from config.ru:in `new'
from config.ru:in `<main>'
from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `eval'
from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/builder.rb:49:in `new_from_string'
from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.6.4/lib/rack/builder.rb:40:in `parse_file'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/lib/puma/configuration.rb:155:in `load_rackup'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/lib/puma/configuration.rb:99:in `app'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/lib/puma/runner.rb:114:in `load_and_bind'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/lib/puma/single.rb:79:in `run'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/lib/puma/cli.rb:214:in `run'
from /app/vendor/bundle/ruby/2.0.0/gems/puma-2.16.0/bin/puma:10:in `<top (required)>'
from /app/vendor/bundle/ruby/2.0.0/bin/puma:23:in `load'
from /app/vendor/bundle/ruby/2.0.0/bin/puma:23:in `<main>' Exception Context
请帮帮我，谢谢。