表单更新时，$ form-＆gt; isValid（）失败

Question

提交表单后，$form->isValid()验证失败。 该页面包含{{ form_widget(edit_form._token) }}。但是当我写var_dump( $editForm->getErrorsAsString() )时，它不输出任何东西 请问是什么原因？ THX

在控制器中：

public function updateAction(Request $request, $id) { $em = $this->getDoctrine()->getManager('shops');

    $entity = $em->getRepository('ShopAdminBundle:Goods')->find($id);

    if (!$entity) {
        throw $this->createNotFoundException('Unable to find Goods entity.');
    }
    $deleteForm = $this->createDeleteForm($id);
    $editForm = $this->createEditForm($entity);
    $editForm->handleRequest($request);



    if ($editForm->isValid()) {
        $em->flush();

        return new Response("<script>window.close();</script>");
    }
    $qb = $em->createQueryBuilder();
    $qb->select('gi')
       ->from('ShopAdminBundle:GoodsImage','gi')
       ->where('gi.gid = '.$entity->getId());

    $GoodsImage = $qb->getQuery()->getResult();

    return $this->render('ShopAdminBundle:Goods:edit.html.twig', array(
        'entity'      => $entity,
        'edit_form'   => $editForm->createView(),
        'delete_form' => $deleteForm->createView(),
        'GoodsImage'  => $GoodsImage,
    ));
}`

并且在视图中：有字段标记和提交〜我无法上传模板代码。格式是e ..我不知道......