在尝试在heroku中打开我的应用时，我得到以下屏幕说：

Application Error
An error occurred in the application and your page could not be served. Please try again in a few moments.
If you are the application owner, check your logs for details.
包含错误的日志如下：
2014-10-14T13：43：20.222314 + 00:00 heroku [router]：at = error code = H10 desc =“App崩溃”方法= GET path =“/” 主机= dry-reaches-7872.herokuapp.com request_id = 5356a97b-0f65-4af0-947b-fe1c42418c1d fwd =“74.118.24.162” dyno = connect = service = status = 503 bytes = 2014-10-14T13：43：20.334555 + 00:00 heroku [router]：at =错误代码= H10 desc =“App crashed”method = GET path =“/ favicon.ico” 主机= dry-reaches-7872.herokuapp.com request_id = 768945b5-b9b6-4a0b-ba4f-fa0e389d4a29 fwd =“74.118.24.162” dyno = connect = service = status = 503 bytes = 2014-10-14T13：47：16.518787 + 00:00 heroku [router]：at =错误代码= H10 desc =“App崩溃”方法= GET path =“/” 主机= dry-reaches-7872.herokuapp.com request_id = 3931e254-4f51-4c90-954a-6bbbf4fe4298 fwd =“74.118.24.162” dyno = connect = service = status = 503 bytes = 2014-10-14T13：47：16.734809 + 00:00 heroku [router]：at =错误代码= H10 desc =“App crashed”method = GET path =“/ favicon.ico” 主机= dry-reaches-7872.herokuapp.com request_id = 69b7e4bb-3953-46af-b608-1625c7556152 fwd =“74.118.24.162” dyno = connect = service = status = 503 bytes =
我尝试在我的项目中使用devise进行身份验证但是失败了，我认为错误是来自设计的一些代码
答案 0 :(得分：0)
您应该在Gemfile中包含devise gem。将此行添加到您的Gemfile并运行 bundle install
gem 'devise'