ActiveAdminのtable_forに渡したcollectionが勝手にdecorateされるようにする ref: http://qiita.com/skuroki@github/items/bcc99e456463901e44fa

file0.txt

module TableDecoration
  def build(obj, *attrs)
    ActiveDecorator::Decorator.instance.decorate(obj)
    super(obj, *attrs)
  end
end

module ActiveAdmin
  module Views
    class TableFor < Arbre::HTML::Table
      prepend TableDecoration
    end
  end
end