gistfile1.rb

class ProductDecorator < ApplicationDecorator
  decorates :product

  # Gets all of the OptionValues that is used by a Variant of the Product
  #
  # Returns an Array of OptionValues
  def option_values
    option_values = []
    
    model.variants.each do |variant|
      option_values << variant.option_values
    end

    option_values.flatten.uniq
  end

  # Groups the OptionValues with their OptionType
  #
  # Returns a Hash with OptionTypes as keys and an Array of OptionValues for values
  def grouped_option_values
    option_values.group_by(&:option_type)
  end
end