修改用电量小数计算错误

application/em/model/Useage.php

@@ -41,7 +41,6 @@ class Useage extends Base
 
         $data = self::alias('ue')
             ->field('ue.*')
-            ->field('(ue.current_sum_numb-ue.last_sum_numb) as repo_numb')
             ->field('station.station_name')
             ->field('em.em_numb')
             ->join(['em'],'em.id=ue.em_id')
@@ -51,6 +50,10 @@ class Useage extends Base
             ->order('ue.id desc')
             ->select()
             ->toarray();
+
+        foreach ($data as $k => $v){
+            $data[$k]['repo_numb'] = $v.current_sum_numb - $v.last_sum_numb;
+        }
         return $data;
     }
     public function getCopyListCount($map){