refactor controller code to model

說明

• 重新將可以放在Model裡面處理的Code，從Controller裡面移掉！

使用情境

• Move finder to scope
• Use model association
• Use scope access
• Add model virtual attribute
• Replace Complex Creation with Factory Method
• Move Model Logic into the Model

使用方式

優點

參考資料

• http://www.good-tutorials.com/tutorials/ruby-on-rails/refactoring
• http://tech.wangyaodi.com/2009/11/09/rails-best-practices/