Rails - Jul 2012 - undefined method `scope' for non ActiveRecord class

I am trying to use the geocoding capabilities into a table less
model , but the method :scope is not defined ..
is there a way to include it ?


class SearchLocation
  require ''geocoder''
  include ActiveModel::Validations
  include ActiveModel::Conversion
  extend ActiveModel::Naming
  extend Geocoder::Model::ActiveRecord  # extending the class w
geocoding capaibilities ( from geocoder)

  geocoded_by :address
  reverse_geocoded_by :latitude, :longitude
...

I get the error in the geocoder/stores/active_record.rb :  # scope:
geocoded objects

...lib/geocoder/stores/active_record.rb

require ''geocoder/stores/base''
# Add geocoding functionality to any ActiveRecord object.
module Geocoder::Store
  module ActiveRecord
    include Base
    # Implementation of ''included'' hook method.
    def self.included(base)
      base.extend ClassMethods
      base.class_eval do

        # scope: geocoded objects
        scope :geocoded, lambda {  # this raises the error

any feedback welcome

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