缴费单作废之后删除关联账单关系

application/api/controller/v2/common/Payment.php

@@ -78,7 +78,7 @@ class Payment
         $invoices = (new EmPaymentInvoice())->where('payment_id', '=', $payment->payment_id)->select();
 
         //释放账单状态
-        if(!$invoices->is_empty()) {
+        if(!$invoices->isEmpty()) {
             $invObj = new Invoice();
             foreach ($invoices as $inv) {
                 $invObj->statusBack($inv->invoice_id,$payment->payment_id);