gistfile1.rb

class Game < ActiveRecord::Base

  has_many :photos, :as => :picturable, :dependent => :destroy
  accepts_nested_attributes_for :photos, :allow_destroy => true, :reject_if => lambda { |a| a[:picture].blank? }

end 

should be outsourced into a module like

=> /lib/attachment.rb
 
module Attachment
  def has_attachment
    has_many :photos, :as => :picturable, :dependent => :destroy
    accepts_nested_attributes_for :photos, :allow_destroy => true, :reject_if => lambda { |a| a[:picture].blank? }
  end
end

Is it possible to include it like this?

class Game < ActiveRecord::Base
  include Attachment
  has_attachment
end

I get some "uninitialized constant Team::Game" where Team is Game's parent class.