module Spree
  # Spree::OrderPromotion represents the relationship between:
  #
  # 1. A promotion that a user attempted to apply to their order
  # 2. The specific code that they used
  class OrderPromotion < ActiveRecord::Base
    self.table_name = 'spree_orders_promotions'

    belongs_to :order, class_name: 'Spree::Order'
    belongs_to :promotion, class_name: 'Spree::Promotion'
    belongs_to :promotion_code, class_name: 'Spree::PromotionCode'

    validates :order, presence: true
    validates :promotion, presence: true
    validates :promotion_code, presence: true, if: :require_promotion_code?

    private

    def require_promotion_code?
      promotion && promotion.codes.any?
    end
  end
end
