heroku 部署ruby项目后 未连接数据库显示（We're sorry, but something went wrong. If you are the application owner ）

如何部署请参照：  http://blog.csdn.net/xz360717118/article/details/62422741

部署后如果发现显示：We're sorry, but something went wrong.  If you are the application owner。。

可能是你没连接数据库， 可以通过 heroku logs 去找里面的错误信息

解决方法：heroku run rails db:migrate 搞定