エラーが発生しました: Connection error: could not connect to server: Connection refused
	Is the server running on host "localhost" and accepting
	TCP/IP connections on port 5432?
could not connect to server: Connection refused
	Is the server running on host "localhost" and accepting
	TCP/IP connections on port 5432?
could not connect to server: Connection refused
	Is the server running on host "localhost" and accepting
	TCP/IP connections on port 5432?