pg_dump：[數據庫（db）]連接到數據庫「開發」失敗：無法連接到服務器：連接被拒絕

Question

在試圖將我的數據庫從我的development.sqlite3文件推送到我的Heroku應用程序時，遇到以下錯誤消息：

pg_dump: [archiver (db)] connection to database "development" failed: could not connect to server: Connection refused 
    Is the server running on host "localhost" (::1) and accepting 
    TCP/IP connections on port 5432? 
could not connect to server: Connection refused 
    Is the server running on host "localhost" (127.0.0.1) and accepting 
    TCP/IP connections on port 5432? 
pg_restore: [archiver] input file is too short (read 0, expected 5) 
psql: could not connect to server: Connection refused 
    Is the server running on host "localhost" (::1) and accepting 
    TCP/IP connections on port 5432? 
could not connect to server: Connection refused 
    Is the server running on host "localhost" (127.0.0.1) and accepting 
    TCP/IP connections on port 5432? 
! Heroku client internal error. 
! Search for help at: https://help.heroku.com 
! Or report a bug at: https://github.com/heroku/heroku/issues/new 

我是Heroku新手，無法弄清楚這一點。希望這是簡單的，我忽略。

Answer 1

首先，sqlite不打算在生產中使用。實際上，Heroku不支持使用sqlite，所以如果你想用Heroku使用你的應用，你需要切換到Postgres：https://devcenter.heroku.com/articles/getting-started-with-rails4#write-your-app。

你得到的具體錯誤是因爲你的heroku應用程序連接到端口5432，默認情況下由Postgres使用並且不被sqlite使用。但是，由於您沒有PG服務器連接到本地主機，所以您的應用程序因此錯誤而失敗。