product package function develop

app/models/product_item.rb

@@ -3,7 +3,7 @@ class ProductItem < ActiveRecord::Base
   has_paper_trail
   self.table_name = "product_items"
   validates :product_id,:item_id,:nums, presence: true
-  validate :order_validation
+  validate :product_validation
   def product_validation
     if self.product_id > 0
       prd = Product.where("id = ?", self.product_id).first