thinkphp更新数据解决办法

    public function edit() {
        $Form =M("release");
        if ($vo = $Form->create()) {
            $list = $Form->save();
            if ($list !== false) {
                $this->success('数据更新成功！');
            } else {
                $this->error("没有更新任何数据!");
            }
        } else {
            $this->error($Form->getError());
        }
        $this->assign('Form',$Form);
        dump($Form);
        $this->display();
    }