Promotion Relation with PromotionProduct

app/models/promotion.rb

@@ -1,2 +1,12 @@
 class Promotion < ApplicationRecord
+  validates_presence_of  :promo_code,:promo_start_date,:promo_end_date,:promo_start_hour,:promo_end_hour,:promo_day,:promo_type,:original_product,:min_qty
+
+  has_many :promotion_products
+
+  accepts_nested_attributes_for :promotion_products , :allow_destroy => true
+
+  PROMO_TYPE1 = "Quantity"
+  PROMO_TYPE2 = "Net_off"
+  PROMO_TYPE3 = "Net_price"
+  PROMO_TYPE4 = "Percentage"
 end