您好我正在尝试使用终端（OSX）中的命令rails c打开rails控制台。我收到了这个错误。
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?
现在我卡住了。我无法调试它？