product.rb

class Product
  include Mongoid::Document
  include Mongoid::Timestamps::Short

  include Tire::Model::Search
  include Tire::Model::Callbacks

  cattr_accessor :mag_libs_cache

  def self.get_prods_by_mode(store, options={})
    self.mag_libs_cache ||= {}
    mag_lib = self.mag_libs_cache[store.id] ||= self.model_name.constantize.get_mag_lib(store)
    .-- more code --
    .
    .
  end
  
  def self.populate! store_id, options={}
  
    self.mag_libs_cache ||= {}
    mag_lib = self.mag_libs_cache[store.id] ||= self.model_name.constantize.get_mag_lib(store)
    
     .-- more code --
    .
    .
  end
end