Product initialization

product.rb

class Product < ActiveRecord::Base
  belongs_to :product_type
  has_many :product_attributes, :extend => FindersByAtrributeName

  def initialize(attributes = nil)
    super
    define_dynamic_accessors
  end

  def define_dynamic_accessors
    product_type.dynamic_attributes.each do |attr|
      define_dynamic_writer(attr.name)
      define_dynamic_reader(attr.name)
    end
  end

end