order base detail export edit

app/models/base_detail.rb

@@ -38,10 +38,10 @@ class BaseDetail < ActiveRecord::Base
 
 
   def paid_time
-    paidTime = 0
     order = Order.where("id = ?", self.order_id).first
     if !order.blank?
-      paidTime=order.paied_at
+      paidTime=order.paied_at == 0 || order.paied_at == nil ? Time.at(0) : Time.at(order.paied_at)
+      return paidTime
     end
     return paidTime
   end