更新

app/Admin/Controllers/NoticeController.php

@@ -12,6 +12,7 @@ use Dcat\Admin\Grid;
 use Dcat\Admin\Show;
 use Dcat\Admin\Http\Controllers\AdminController;
 use Faker\Factory;
+use Illuminate\Support\Facades\DB;
 
 class NoticeController extends AdminController
 {