增加订单导入功能

app/models/order_detail.rb

@@ -2,7 +2,7 @@
 class OrderDetail < ActiveRecord::Base
   has_paper_trail
   self.table_name = "order_details"
-  belongs_to :product
+  #belongs_to :product
   belongs_to :order, :foreign_key => :order_id
   # has_one :order, :foreign_key=>:order_id, :primary_key=>:order_id
   validates :order_no,:product_id,:nums, presence: true
@@ -59,6 +59,14 @@ class OrderDetail < ActiveRecord::Base
     end
   end
 
+  def product
+    pd = Product.where("id = ?", self.product_id).first
+    if !pd.blank?
+      return pd.name
+    else
+      return "--"
+    end
+  end
 
   def paid_time
     order = Order.where("id = ?", self.order_id).first