diff --git a/admin/controllers/base/RegisterController.php b/admin/controllers/base/RegisterController.php
index b833860..60031f4 100644
--- a/admin/controllers/base/RegisterController.php
+++ b/admin/controllers/base/RegisterController.php
@@ -42,9 +42,9 @@ class RegisterController extends BaseAdminController
             ])->orderBy(['r.id' => SORT_DESC]);
         }
 
-        $patient = $get['patient_name'];
-        $mobile = $get['mobile'];
-        $doctor = $get['doctor_name'];
+        $patient = $get['patient_name']?? '';
+        $mobile = $get['mobile']?? '';
+        $doctor = $get['doctor_name']?? '';
         $query->joinWith(['patient' => function ($p) use ($patient, $mobile) {
             $p->alias('p');
             if (!empty($patient)) {//患者