调整账单列表显示字段，添加本期表数，上期表数，并计算用电量，添加抄表日期

application/em/model/EmInvoice.php

@@ -33,7 +33,7 @@ class EmInvoice extends Base
         $data = self::alias('inv')
             ->field('inv.*')
             ->field('station.station_name,em.em_numb')
-            ->field('eu.last_sum_numb,eu.current_sum_numb,FROM_UNIXTIME("eu.current_date","yyyy-MM-dd")')
+            ->field('eu.last_sum_numb,eu.current_sum_numb,FROM_UNIXTIME("eu.current_date","yyyy-MM-dd") as eu.current_date')
             ->join(['em_invoice_useage'=>'eiu'],'eiu.invoice_id = inv.invoice_id')
             ->join(['em_useage'=>'eu'],'eu.useage_id = eiu.useage_id')
             ->join(['em_account'=>'ea'],'ea.account_id = inv.account_id')