RailsCasts 002 dynamic find by methods

传统的查询方法：

@tasks = Task.find(:all, :conditions => ['complete = ?', false])
@tasks = Task.find(:first, :conditions => ['complete = ?', false], :order => 'created_at DESC')

动态查询方法：

@tasks = Taks.find_all_by_complete(false)
@tasks = Taks.find_by_complete(false, :order => 'created_at DESC')

注意第二个，直接把:order这个hash作为第二个参数传进去就可以了。