header('树状模型') ->body(function (Row $row) { $tree = new Tree(new Category); $row->column(12, $tree); }); } public function form() { return Form::make(new Category(),function (Form $form){ $form->text('title'); $form->number('sort'); // 只查一级 $form->select('parent_id')->default(51); $form->image('cover_img'); }); } }