Rails - Aug 2006 - polymorphic challenge

Hello guys,

I have  2 classes (I pasted small part of them here);

class Shop < ActiveRecord::Base
  has_many :items, :as=> :itemable

  protected
  def self.paying_scope
    with_scope(:find => {:conditions => ''expires_on >
NOW()'', :include
=> [:address]}) do
      yield
    end
  end
end

class Item < ActiveRecord::Base
  belongs_to :itemable, :polymorphic => true
end

Shops has expires_on field which I check if they can be shown or not 
during searches => NO PROBLEM

I need to do same think for items, if a shop subscription (=expires_on) 
is expired then I wanna exclude that item from search.

What is the elegant way to solve it?

Thanks in advance

PS: I use http://rubyforge.org/projects/ez-where/  for my searches.

Gokhan



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