在Mountain Lion postgresql上升级后不起作用

Question

我刚刚将我的Macbook更新为Mountain Lion，但现在postgresql不起作用。当我让rails服务器运行时，我收到以下错误消息：

could not connect to server: No such file or directory (PG::Error)
        Is the server running locally and accepting
        connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"?

-更新-现在我得到以下错误消息：

$ rails s
=> Booting Mongrel
=> Rails 3.1.0 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server

Started GET "/" for 127.0.0.1 at 2012-07-29 11:54:46 +0200
PGError (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?
could not connect to server: Connection refused
Is the server running on host "localhost" (fe80::1) and accepting
TCP/IP connections on port 5432?
): 

Answer 1

您是否安装了make、autconf、automake、binutils、bison、m4或安装包来构建内核或重新安装ruby：pg gem'；0.14.0'；《山狮》失败。