thinkphp更新数据,该如何处理

    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();

	}