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WARNING: Nokogiri was built against LibXML version 2.8.0, but has dynamically loaded 2.7.3
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/opt/local/lib/ruby1.9/gems/1.9.1/gems/activerecord-3.2.3/lib/active_record/connection_adapters/postgresql_adapter.rb:1194:in `initialize': could not connect to server: Connection refused (PG::Error)
    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?

当运行 psql -h localhost 我得到：

psql: could not connect to server: Connection refused
    Is the server running on host "localhost" and accepting
    TCP/IP connections on port 5432?

我的系统设置：Mac OSX 10.7.5，所有东西都是用 Macports 安装的。

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