Lynda.com教程中的First Rails Configuration，無法使用Rails服務器啟動

Question

當我嘗試使用Rails Server時，我得到了：

/Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2/mysql2.bundle: dlopen(/Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2/mysql2.bundle, 9): Library not loaded: libmysqlclient.18.dylib (LoadError)
  Referenced from: /Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2/mysql2.bundle
  Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2/mysql2.bundle
    from /Library/Ruby/Gems/1.8/gems/mysql2-0.2.7/lib/mysql2.rb:8
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:68:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:68:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:66:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:66:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:55:in `each'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler/runtime.rb:55:in `require'
    from /Library/Ruby/Gems/1.8/gems/bundler-1.0.11/lib/bundler.rb:120:in `require'
    from /Users/inathan/sites/simple_cms/config/application.rb:7
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:28:in `require'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:28
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:27:in `tap'
    from /Library/Ruby/Gems/1.8/gems/railties-3.0.6/lib/rails/commands.rb:27
    from script/rails:6:in `require'
    from script/rails:6

我以為我完全按照步驟走了，但現在我很沮喪。 提前致謝...

Answer 1

您需要從mysql官方站點安裝mysql，確保已啟動，然后安裝適當的mysql gem（用於rails 2.x的mysql和用於rails 3.x的mysql2）