balance promotion settings

app/models/order_detail.rb

@@ -13,7 +13,7 @@ class OrderDetail < ActiveRecord::Base
       if prd.blank?
         self.errors.add(:product_id,"商品不存在，请重新填写商品ID")
       else
-        self.product_name=prd.Name
+        self.product_name=prd.name
       end
     end
 
@@ -22,7 +22,7 @@ class OrderDetail < ActiveRecord::Base
       if ord.blank?
         self.errors.add(:order_id,"订单不存在，请重新填写编号")
       else
-        self.order_id=order.Id
+        self.order_id=order.id
       end
     end