Heroku应用崩溃

Question

我已经在本地测试了我的Rails 3应用一堆，最后部署到Heroku。一切正常工作一段时间，所有页面加载，然后我开始得到一个错误页面，说应用程序崩溃。我检查我的日志和这里的输出：

2011-06-02T18:17:18+00:00 heroku[web.1]: State changed from starting to crashed 
2011-06-02T18:17:18+00:00 heroku[web.1]: State changed from crashed to created 
2011-06-02T18:17:18+00:00 heroku[web.1]: State changed from created to starting 
2011-06-02T18:17:23+00:00 heroku[web.1]: Starting process with command: `thin -p 45189 -e production -R /home/heroku_rack/heroku.ru start` 
2011-06-02T18:17:25+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/activerecord-3.0.3/lib/active_record/base.rb:1008:in `method_missing': undefined local variable or method `user_id' for #<Class:0x7fac147671c8> (NameError) 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/app/models/order.rb:23 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:227:in `load_dependency' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:346:in `require_or_load' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:300:in `depend_on' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:216:in `require_dependency' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/engine.rb:138:in `eager_load!' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/engine.rb:137:in `each' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/engine.rb:135:in `each' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/engine.rb:137:in `eager_load!' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/engine.rb:135:in `eager_load!' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/application.rb:108:in `eager_load!' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/application/finisher.rb:41 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `instance_exec' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `run' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:50:in `run_initializers' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `each' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `run_initializers' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/application.rb:134:in `initialize!' 
2011-06-02T18:17:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.3/lib/rails/application.rb:77:in `send' 
2011-06-02T18:17:25+00:00 app[web.1]: from config.ru:3 
2011-06-02T18:17:25+00:00 heroku[web.1]: Process exited 
2011-06-02T18:17:26+00:00 heroku[web.1]: State changed from starting to crashed 
2011-06-02T18:17:27+00:00 heroku[router]: Error H10 (App crashed) -> GET domainpolish.heroku.com/orders dyno=none queue=0 wait=0ms service=0ms bytes=0 
2011-06-02T18:17:35+00:00 heroku[router]: Error H10 (App crashed) -> GET domainpolish.heroku.com/orders dyno=none queue=0 wait=0ms service=0ms bytes=0 
2011-06-02T18:17:37+00:00 heroku[router]: Error H10 (App crashed) -> GET domainpolish.heroku.com/orders dyno=none queue=0 wait=0ms service=0ms bytes=0 

有没有人有任何想法发生了什么问题？提前致谢！

Answer 1

像你这样的流浪者可能忘记在推新代码后迁移。要迁移您的应用在Heroku的DB，运行：

heroku rake db:migrate