ruby on rails mac x os lion运行服务器LoadError

Question

在终端上键入Rails服务器时，出现以下错误。 我不知道该如何解决。 有人可以帮我吗？ 而且我还需要ruby on rails mac os x Lion安装教程。

:simple_cms benhuayang$ rails server
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/lib/mysql2.rb:9:in `require':
dlopen(/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)  
Referenced from:
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle
Reason: image not found -
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle   from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/mysql2-0.3.11/lib/mysql2.rb:9:in `<top (required)>'    from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `require'     from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:68:in `block (2 levels) in require'     from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `each'    from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:66:in `block in require'    from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `each'    from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler/runtime.rb:55:in `require'     from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/gems/bundler-1.0.21/lib/bundler.rb:122:in `require'    from
/Users/benhuayang/Sites/simple_cms/config/application.rb:7:in `<top (required)>' from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:53:in `require'     from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:53:in `block in '   from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:50:in `tap'     from
/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/gems/railties-3.2.1/lib/rails/commands.rb:50:in `<top (required)>'  from
script/rails:6:in `require'     from
script/rails:6:in `<main>'

这是mysql的路径

/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0/bin:/Users/benhuayang/.rvm/gems/ruby-1.9.3-p0@global/bin:/Users/benhuayang/.rvm/rubies/ruby-1.9.3-p0/bin:/Users/benhuayang/.rvm/bin:/opt/local/bin:/opt/local/sbin:/usr/local/mysql/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin

Answer 1

过去遇到这种情况时，我使用了以下解决方案。

在终端中，运行：

export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:/usr/local/mysql/lib"

然后尝试在应用程序的根目录中运行rails server命令。 如果可行，只需在您的〜/ .profile中输入相同的命令，使其在您每次进入终端时都运行。

Answer 2

当运行rake db：migrate后出现以下错误时，Ryan的解决方案为我工作，我认为发布它会帮助Google搜索。

rake aborted!
dlopen(/Users/[USERNAME]/.rvm/gems/ruby-1.9.3-p286/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib
  Referenced from: /Users/[USERNAME]/.rvm/gems/ruby-1.9.3-p286/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle
  Reason: image not found - /Users/[USERNAME]/.rvm/gems/ruby-1.9.3-p286/gems/mysql2-0.3.11/lib/mysql2/mysql2.bundle

(See full trace by running task with --trace)