update

app/Http/Controllers/Mobile/UserController.php

@@ -249,7 +249,6 @@ class UserController extends CommonController
             })->first();
         if ($course_signs) {
             $course_signs->qrcode = $doorRepository->getEmpQrCodeByCourse($course_signs, $out);
-            $course_signs->qrcode = '';
         }
         // 是否有资格进入校友库
         $enter_schoolmate = User::whereHas('courseSigns', function ($query) {