Extendable products controller

gistfile1.rb

module Spree
  module Admin
    class ProductController < Spree::Admin::ResourceController
      include ActiveSupport::Callbacks

      define_callbacks :load_collection
      set_callback :load_collection, :after, :paginate_collection

      def index
        respond_with(@collection)
      end

      private 
        def collection
          return @collection if @collection.present?
          
          run_callbacks :load_collection do
             @collection = super
          end

          @collection
        end

        def paginate_collection
          @collection = @collection.page(params[:page]).per(Spree::Config[:admin_products_per_page])
        end
    end
  end
end