otoplastik_customer.rb

class OtoplastikCustomer < Customer
  def otoplastik?
    true
  end

  def prices(article)
    query = lambda do |merchant_code|
      OtoplastikArticlePrice.where("otoplastik_article_id = ? AND merchant_code = ?", article.id, merchant_code).order("minimum DESC")
    end

    prices = query.call(article.id)
    prices = query.call(self.price_group) unless prices.exists?
    prices = query.call(self.price_list) unless prices.exists?
  end
end