update

app/Http/Controllers/Mobile/SupplyDemandController.php

@@ -259,7 +259,7 @@ class SupplyDemandController extends CommonController
             $now = date('Y-m-d');
             // 过期数据不能私信
             $supplyDemand = SupplyDemand::find($all['supply_demand_id']);
-            if ($supplyDemand->expire_time > $now) {
+            if (isset($supplyDemand->expire_time) && $supplyDemand->expire_time > $now) {
                 return $this->fail([ResponseCode::ERROR_BUSINESS, '该信息已过期，不能私信']);
             }
             if ($dialogue->supply_demand_id != $all['supply_demand_id']) {