Rubyonrails 服务器是否在主机localhost(：：1) 上运行并接受端口 5432 上的 TCPIP 连接

在此之前，请注意，我在Stack Overflow和web上的文章中发现了几个类似的问题，但这些问题都没有帮助我解决问题:

• PG Error could not connect to server: Connection refused Is the server running on port 5432?
• PG::ConnectionBad - could not connect to server: Connection refused
• psql: could not connect to server: Connection refused

现在，问题是:

• 我有一个Rails应用程序，工作起来很有魅力.
• 与我的合作者一起，我们使用GitHub进行合作.
• 我们有master家和mvp家分店.
• 我最近用brew 软件(Mac)更新了我的git版.
• 我们使用Foreman在本地启动应用程序.

现在，当我try 在本地启动应用程序时，我会出现以下错误:

PG::ConnectionBad at /
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?

我试过几次重启电脑.

我还判断了/usr/local/var/postgres的内容:

PG_VERSION      pg_dynshmem     pg_multixact    pg_snapshots    pg_tblspc       postgresql.conf
base            pg_hba.conf     pg_notify       pg_stat         pg_twophase     postmaster.opts
global          pg_ident.conf   pg_replslot     pg_stat_tmp     pg_xlog         server.log
pg_clog         pg_logical      pg_serial       pg_subtrans     postgresql.auto.conf

正如你所见，里面没有postmaster.pid个文件.

知道我该怎么解决吗？