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操作系统版本： Mac OS X 10.7.1 Lion
Ruby 版本： ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-darwin11.1.0]
Ruby 位置： /usr/local/rvm/bin/ruby
Rails 版本： Rails 3.1.0
Rails 位置： /usr/local/rvm/gems/ruby-1.9.2-p290/bin/rails

现在，我安装了 mysql2 gem，当我运行gem list它时，它在列表中显示为：mysql2 (0.3.7)

到目前为止一切顺利，对吧？好的，这就是它变得棘手的地方。无论我做什么，我都无法启动服务器。在终端中，我 cd 到我的 rails 应用程序所在的目录并运行rails s. 但是，我没有开始，而是得到了这个：

/usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/lib/mysql2.rb:9:in `require': dlopen(/usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)
  Referenced from: /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/lib/mysql2/mysql2.bundle
  Reason: image not found - /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/lib/mysql2/mysql2.bundle
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/mysql2-0.3.7/lib/mysql2.rb:9:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `each'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:66:in `block in require'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `each'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler/runtime.rb:55:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/bundler-1.0.18/lib/bundler.rb:120:in `require'
    from /Users/doug/Sites/simple_cms/config/application.rb:7:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.0/lib/rails/commands.rb:52:in `require'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.0/lib/rails/commands.rb:52:in `block in <top (required)>'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.0/lib/rails/commands.rb:49:in `tap'
    from /usr/local/rvm/gems/ruby-1.9.2-p290/gems/railties-3.1.0/lib/rails/commands.rb:49:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

显然，这不是应该发生的事情。问题是我不知道为什么不。我遇到的解决方案都没有奏效。

这实际上是我第一次尝试让 Ruby/RoR 在我的计算机上运行。我正在关注 Lynda.com 的教程，不出所料，这不会发生在制作视频的人身上。

我试过搜索，正如我所说，似乎没有任何帮助。想法？

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install_name_tool -change libmysqlclient.18.dylib /usr/local/mysql/lib/libmysqlclient.18.dylib ~/.rvm/gems/ruby-1.9.2-p290@[gemset name]/gems/mysql2-0.3.7/lib/mysql2/mysql2.bundle

[gemset name] = 您正在使用的 gemset 的名称 - 如果您没有设置一个，那么您应该设置它，因为这是获取 rvm 的要点之一

希望有帮助

于 2011-09-27T03:51:16.733 回答