ruby - 使用 postgres.app 在 rvm 下要求 pg 时出错

Question

我正在使用 Postgres.app在 OS X (10.8.3) 上。我已经修改了我的 PATH，以便应用程序的 bin 文件夹位于所有其他文件夹之前。

Rammy:~ phrogz$ which pg_config
/Applications/Postgres.app/Contents/MacOS/bin/pg_config

我已经安装了 rvm 并且可以毫无错误地安装 pg gem，但是当我需要它时我得到一个错误:

Rammy:~ phrogz$ gem -v
1.8.25

Rammy:~ phrogz$ gem install pg
Fetching: pg-0.15.1.gem (100%)
Building native extensions.  This could take a while...
Successfully installed pg-0.15.1
1 gem installed

Rammy:~ phrogz$ ruby -v -e "require 'pg'"
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.3.0]
/Users/phrogz/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require': dlopen(/Users/phrogz/.rvm/gems/ruby-1.9.3-p392/gems/pg-0.15.1/lib/pg_ext.bundle, 9): Library not loaded: @executable_path/../lib/libssl.1.0.0.dylib (LoadError)
  Referenced from: /Applications/Postgres.app/Contents/MacOS/lib/libpq.dylib
  Reason: image not found - /Users/phrogz/.rvm/gems/ruby-1.9.3-p392/gems/pg-0.15.1/lib/pg_ext.bundle
    from /Users/phrogz/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
    from /Users/phrogz/.rvm/gems/ruby-1.9.3-p392/gems/pg-0.15.1/lib/pg.rb:4:in `<top (required)>'
    from /Users/phrogz/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `require'
    from /Users/phrogz/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:60:in `rescue in require'
    from /Users/phrogz/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:35:in `require'
    from -e:1:in `<main>'

我需要做什么才能正确安装 pg gem？

Answer 1

编辑:尽管目前这个答案的票数比接受的答案多，但接受的答案要简单得多、清晰得多。

---

安装 pg gem 时从路径中删除 Postgres.app 二进制文件，而是使用 OS X 内置的 postgres 安装来配置 gem。 pg 库稍后仍会正确连接到 Postgres.app 服务器。

Rammy:~ phrogz$ gem uninstall pg
Successfully uninstalled pg-0.15.1

# Modify PATH to remove /Applications/Postgres.app/Contents/MacOS/bin

Rammy:~ phrogz$ gem install pg
Fetching: pg-0.15.1.gem (100%)
Building native extensions.  This could take a while...
Successfully installed pg-0.15.1
1 gem installed

Rammy:~ phrogz$ ruby -v -e "require 'pg'"
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin12.3.0]