所以我创建了一个heroku应用程序，推送它，db：已经迁移它。该应用程序在我的本地计算机上工作正常，但它只是在heroku上崩溃。我是新手，不知道从哪里开始麻烦拍摄。提前致谢！从创建应用程序到迁移的所有日志都在这里：
2011-04-17T22:51:03-07:00 heroku[slugc]: Slug compilation finished
2011-04-18T05:51:07+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require': /app/app/controllers/users_controller.rb:28: syntax error, unexpected '.', expecting kEND (SyntaxError)
2011-04-18T05:51:07+00:00 app[web.1]: ... .paginate(:page => params[:page...
2011-04-18T05:51:07+00:00 app[web.1]: ^
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:227:in `load_dependency'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:346:in `require_or_load'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:300:in `depend_on'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:216:in `require_dependency'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:138:in `eager_load!'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:137:in `each'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:137:in `eager_load!'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:135:in `each'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:135:in `eager_load!'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:108:in `eager_load!'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application/finisher.rb:41
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `instance_exec'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `run'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:50:in `run_initializers'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `each'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `run_initializers'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:134:in `initialize!'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:77:in `send'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:77:in `method_missing'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/config/environment.rb:5
2011-04-18T05:51:07+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
2011-04-18T05:51:07+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
2011-04-18T05:51:07+00:00 app[web.1]: from config.ru:3
2011-04-18T05:51:07+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `instance_eval'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `initialize'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:63:in `new'
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:63:in `map'
2011-04-18T05:51:07+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:18
2011-04-18T05:51:07+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `initialize'
2011-04-18T05:51:07+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `new'
2011-04-18T05:51:07+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:1
2011-04-17T22:51:07-07:00 heroku[web.1]: State changed from starting to crashed
2011-04-17T22:51:07-07:00 heroku[web.1]: State changed from crashed to created
2011-04-17T22:51:07-07:00 heroku[web.1]: State changed from created to starting
2011-04-17T22:51:10-07:00 heroku[web.1]: State changed from created to starting
2011-04-18T05:51:11+00:00 app[web.1]: /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require': /app/app/controllers/users_controller.rb:28: syntax error, unexpected '.', expecting kEND (SyntaxError)
2011-04-18T05:51:11+00:00 app[web.1]: ... .paginate(:page => params[:page...
2011-04-18T05:51:11+00:00 app[web.1]: ^
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:227:in `load_dependency'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:346:in `require_or_load'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:300:in `depend_on'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:216:in `require_dependency'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:138:in `eager_load!'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:137:in `each'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:137:in `eager_load!'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:135:in `each'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/engine.rb:135:in `eager_load!'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:108:in `eager_load!'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application/finisher.rb:41
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `instance_exec'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `run'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:50:in `run_initializers'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `each'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `run_initializers'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:134:in `initialize!'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:77:in `send'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/railties-3.0.5/lib/rails/application.rb:77:in `method_missing'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/config/environment.rb:5
2011-04-18T05:51:11+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
2011-04-18T05:51:11+00:00 app[web.1]: from /usr/ruby1.8.7/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
2011-04-18T05:51:11+00:00 app[web.1]: from config.ru:3
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `instance_eval'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `initialize'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:63:in `new'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:63:in `map'
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:18
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `instance_eval'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `initialize'
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `new'
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `instance_eval'
2011-04-18T05:51:11+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.8/gems/rack-1.2.2/lib/rack/builder.rb:46:in `initialize'
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:1:in `new'
2011-04-18T05:51:11+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:1
2011-04-17T22:51:15-07:00 heroku[web.1]: State changed from starting to crashed
2011-04-18T05:51:21+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/ dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:51:22-07:00 heroku[nginx]: GET / HTTP/1.1 | 75.72.164.255 | 795 | http | 503
2011-04-18T05:51:22+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/favicon.ico dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:51:22-07:00 heroku[nginx]: GET /favicon.ico HTTP/1.1 | 75.72.164.255 | 795 | http | 503
2011-04-17T22:51:39-07:00 heroku[rake.1]: State changed from created to starting
2011-04-17T22:51:43-07:00 heroku[rake.1]: State changed from starting to up
2011-04-17T22:51:49-07:00 heroku[rake.1]: State changed from up to complete
2011-04-18T05:51:59+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/ dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:51:59-07:00 heroku[nginx]: GET / HTTP/1.1 | 75.72.164.255 | 795 | http | 503
2011-04-18T05:51:59+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/favicon.ico dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:51:59-07:00 heroku[nginx]: GET /favicon.ico HTTP/1.1 | 75.72.164.255 | 795 | http | 503
2011-04-18T05:52:00+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/ dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:52:00-07:00 heroku[nginx]: GET / HTTP/1.1 | 75.72.164.255 | 795 | http | 503
2011-04-18T05:52:01+00:00 heroku[router]: Error H10 (App crashed) -> GET indelearn.heroku.com/favicon.ico dyno=none queue=0 wait=0ms service=0ms bytes=0
2011-04-17T22:52:01-07:00 heroku[nginx]: GET /favicon.ico HTTP/1.1 | 75.72.164.255 | 795 | http | 503
users_contoller＃28是一个paginate，后跟一个非常长的SQL查询：
@discussions = Discussion.find_by_sql("SELECT d.*, MAX(c.created_at) AS lastCommentTime
FROM discussions d JOIN comments c ON d.id = c.commentable_id
WHERE c.commentable_type = 'Discussion' AND c.user_id = #{@user.id}
GROUP BY d.id ORDER BY lastCommentTime DESC")
.paginate(:page => params[:page], :per_page => 10)
所以我在点之前删除了换行符并且它已修复。谢谢你们的超级大国！新手很难发现该日志文件中的关键错误行。 :)
答案 0 :(得分：1)
堆栈跟踪在第28行提到app/controllers/users_controller.rb。此文件及其周围的代码是什么？这可能是您找到问题的地方。
另外，我知道这听起来很傻，但三重检查一切都已检入你的Git回购。由于Heroku是基于Git的，因此很容易忘记检查内容，并git push将旧版本的应用程序发送到服务器。