add auto take cash function

app/models/order.rb

@@ -4,7 +4,7 @@ require 'rest-client'
 class Order < ActiveRecord::Base
     has_paper_trail
     self.table_name = 'orders'
-    validates_presence_of :user_id,:total_price,:order_id
+    validates_presence_of :user_id,:wx_user_id,:total_price,:order_id
     #belongs_to :user, :foreign_key => :user_id
     belongs_to :wx_user, :foreign_key => :wx_user_id
     belongs_to :depart_record, :foreign_key => :depart