Precompiling assets failed.remote

运行 $git push heroku master 出现以下的问题
could not connect to server: Connection refused
   Is the server running on host "127.0.0.1" and accepting
   TCP/IP connections on port 5432?
   Tasks: TOP => environment
Precompiling assets failed.remote:  !     
Attempted to access a nonexistent database:remote:  !     
https://devcenter.heroku.com/articles/pre-provision-database
解决方案：
在config/application.rb文件里添加

config.assets.initialize_on_precompile = false

http://stackoverflow.com/questions/13712012/error-pushing-to-heroku-aborting-my-rake-assetsprecompile