我正在尝试将我的旧网站部署到 Heroku。一切顺利，它开始了，但是当我通过网络浏览器访问它时，我得到了
NameError (uninitialized constant ApplicantsController::GeoIP):
我正在使用 Rails 2.3.18（我的网站非常简单，只想“按原样”尽快部署它；在专用服务器上一切正常）。
我在“db”文件夹和 controllers/applicants_controller.rb 中有一个 GeoIP.dat 文件
line 32: geoip ||= GeoIP.new("db/GeoIP.dat")
line 33: location = geoip.country('google.com')
如果我在 Heroku 上启动 irb，一切看起来都不错：
login@sancho:~$ heroku run bash
Running `bash` attached to terminal... up, run.7785
~ $ irb
irb(main):001:0> require 'geoip'
=> true
irb(main):002:0> geoip ||= GeoIP.new("db/GeoIP.dat")
=> #<GeoIP:0x00000002b3a6a8 @mutex=#<Mutex:0x00000002b3a680>, @flags=0, @database_type=1, @record_length=3, @file=#<File:db/GeoIP.dat>, @database_segments=[16776960]>
irb(main):004:0> geoip.country('google.com')
=> #<struct GeoIP::Country request="google.com", ip="74.125.228.110", country_code=225, country_code2="US", country_code3="USA", country_name="United States", continent_code="NA">
irb(main):005:0>
这是完整的错误日志。
2013-05-02T13:08:25.938481+00:00 app[web.1]: Processing ApplicantsController#create (for 87.207.27.219 at 2013-05-02 13:08:25) [POST]
2013-05-02T13:08:25.938481+00:00 app[web.1]: Parameters: {"status"=>"complete"}
2013-05-02T13:08:26.029730+00:00 app[web.1]:
2013-05-02T13:08:26.029730+00:00 app[web.1]: NameError (uninitialized constant ApplicantsController::GeoIP):
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activesupport-2.3.18/lib/active_support/dependencies.rb:131:in `rescue in const_missing'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/filters.rb:610:in `perform_action_with_filters'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/benchmarking.rb:68:in `block in perform_action_with_benchmark'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/rescue.rb:160:in `perform_action_with_rescue'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/flash.rb:151:in `perform_action_with_flash'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/dispatcher.rb:87:in `dispatch'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/dispatcher.rb:121:in `_call'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/query_cache.rb:29:in `block in call'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/session/cookie_store.rb:99:in `call'
2013-05-02T13:08:26.030520+00:00 app[web.1]: <internal:prelude>:10:in `synchronize'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activesupport-2.3.18/lib/active_support/dependencies.rb:120:in `const_missing'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/base.rb:532:in `process'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/dispatcher.rb:130:in `block in build_middleware_stack'
2013-05-02T13:08:26.029730+00:00 app[web.1]: app/controllers/applicants_controller.rb:32:in `create'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/base.rb:391:in `process'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/filters.rb:617:in `call_filters'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/base.rb:386:in `call'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/base.rb:1333:in `perform_action'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/filters.rb:606:in `process_with_filters'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/query_cache.rb:29:in `call'
2013-05-02T13:08:26.029730+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/benchmarking.rb:68:in `perform_action_with_benchmark'
2013-05-02T13:08:26.030057+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/routing/route_set.rb:438:in `call'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/query_cache.rb:9:in `cache'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/activerecord-2.3.18/lib/active_record/query_cache.rb:28:in `call'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/params_parser.rb:15:in `call'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/connection.rb:79:in `catch'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/string_coercion.rb:25:in `call'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/connection.rb:79:in `pre_process'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/server.rb:159:in `start'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/connection.rb:54:in `process'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/backends/base.rb:63:in `start'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/runner.rb:187:in `run_command'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/connection.rb:81:in `block in pre_process'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/runner.rb:152:in `run!'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/dispatcher.rb:106:in `call'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/bin/thin:6:in `<top (required)>'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run_machine'
2013-05-02T13:08:26.030520+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/connection.rb:39:in `receive_data'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/bin/thin:19:in `load'
2013-05-02T13:08:26.030298+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/actionpack-2.3.18/lib/action_controller/failsafe.rb:26:in `call'
2013-05-02T13:08:26.030750+00:00 app[web.1]: vendor/bundle/ruby/1.9.1/gems/thin-1.5.1/lib/thin/controllers/controller.rb:86:in `start'
2013-05-02T13:08:26.030750+00:00 app[web.1]: Rendering /app/public/500.html (500 Internal Server Error)
来自 Heroku 的捆绑日志：
Running: bundle install --without development:test --path vendor/bundle --binstubs vendor/bundle/bin --deployment
The source :gemcutter is deprecated because HTTP requests are insecure.
Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.
Using rake (0.8.7)
Using activesupport (2.3.18)
Using rack (1.1.6)
Using actionpack (2.3.18)
Using actionmailer (2.3.18)
Using activerecord (2.3.18)
Using activeresource (2.3.18)
Using daemons (1.1.9)
Using eventmachine (1.0.3)
Using geoip (1.2.1)
Using pg (0.15.1)
Using rails (2.3.18)
Using thin (1.5.1)
Using bundler (1.3.2)
Your bundle is complete! It was installed into ./vendor/bundle
在此先感谢您的帮助！