Rails 服务器不能与 mysql2 gem 一起使用答案

【问题标题】：Rails server not working with mysql2 gemRails 服务器不能与 mysql2 gem 一起使用
【发布时间】：2014-05-19 20:31:34
【问题描述】：

我正在使用mysql2 gem，但由于某种原因我无法运行rails server 命令。我已经尝试了 stackoverflow 中的所有解决方案，但似乎没有任何效果。这是输出。

$ rails s
/Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.15/lib/mysql2.rb:8:in `require': dlopen(/Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/mysql2-0.3.15/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)
  Referenced from: /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/mysql2-0.3.15/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/2.0.0/extensions/universal-darwin-13/2.0.0/mysql2-0.3.15/mysql2/mysql2.bundle
    from /Library/Ruby/Gems/2.0.0/gems/mysql2-0.3.15/lib/mysql2.rb:8:in `<top (required)>'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:76:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:72:in `each'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:72:in `block in require'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:61:in `each'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler/runtime.rb:61:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/bundler-1.6.0.pre.1/lib/bundler.rb:131:in `require'
    from /Users/user/Desktop/simple_cms/basic_cms/config/application.rb:7:in `<top (required)>'
    from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:74:in `require'
    from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:74:in `block in <top (required)>'
    from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `tap'
    from /Library/Ruby/Gems/2.0.0/gems/railties-4.0.4/lib/rails/commands.rb:71:in `<top (required)>'
    from bin/rails:4:in `require'
    from bin/rails:4:in `<main>'

【问题讨论】：

你安装了XCode吗？
是的，Xcode 已安装，mysql 也已安装。
Library not loaded: libmysqlclient.16.dylib error when trying to run 'rails server' on OS X 10.6 with mysql2 gem 的可能重复项

标签： ruby-on-rails ruby webrick mysql2 mysql2psql-gem

【解决方案1】：

尝试将此添加到您的 .bash_profile

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

【讨论】：

【解决方案2】：

感谢大家的帮助。我确实找到了解决方案，尽管我真的不知道如何解释。这就是我所做的。

sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib

【讨论】：