test sum

app/models/cash_balance.rb

@@ -44,9 +44,7 @@ class CashBalance < ActiveRecord::Base
   @total=0
   @list=[]
   def get_happen_total
-    unless @list.include?(self.id)
-      @list.append(self.id)
-    end
+    @list.append(self.id)
 
     total =  CashBalance.where(id: @list).sum("count")