add balance promotion shop promotion

app/models/shop_promotion.rb

@@ -161,9 +161,7 @@ class ShopPromotion < ActiveRecord::Base
           field :name
           field :begin_time
           field :end_time
-          field :min_total
-          field :max_total
-          field :is_more
+          field :total
 =begin
           field :depart, :enum do
             enum do