快递单号前缀为null的输出空

app/OrderPackage.php

@@ -255,4 +255,9 @@ class OrderPackage extends Model
         $this->tempFields['temOracleInfo']=$resultOracleObjs->first();
         return $this->tempFields['temOracleInfo'];
     }
+    public function getLogisticNumberAttribute($val)
+    {
+        if(strpos($val,'null')===false)return '';
+        return $val;
+    }
 }