Symfony 3使用Twig中的删除操作

Question

所以我从CRUD生成器复制了基本删除操作:

   /**
    * @Route("category/delete/{id}", name="category_delete")
    * @Method("DELETE")
    */
    public function deleteAction(Request $request, $id)
    {
        $repository = $this->getDoctrine()->getRepository('AppBundle:Category');
        $category = $repository->find($id);

        $form = $this->createDeleteForm($category);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $em->remove($category);
            $em->flush();
        }

        return $this->redirectToRoute('category_index');
    }

    /**
     *
     * @param Category $category
     *
     * @return \Symfony\Component\Form\Form The form
     */
    private function createDeleteForm(Category $category)
    {
        return $this->createFormBuilder()
            ->setAction($this->generateUrl('category_delete', array('id' => $category->getId())))
            ->setMethod('DELETE')
            ->getForm()
            ;
    } 

但是,我不确定如何实际使用动作本身.我想在两个地方删除,我不确定正确的方法:

1. 在编辑操作中删除 - 如何向表单构建器添加删除按钮？我是否必须在树枝模板中进行此操作？
2. 在索引中删除 - 我知道如何调用操作(例如<a href="{{ path('category_edit', {'id': cat.id}) }}" class="btn btn-default">Edit</a>),但这不适用于删除操作.

我已经尝试过查看Symfony演示应用程序,但我仍然没有完全掌握删除操作的工作原理 - 我在文档中找不到任何内容.

有人可以简要说明删除操作对1和2的工作原理吗？

Answer 1

删除脚本Symfony CRUD与表单提交一起使用.因此,您必须呈现一个表单以显示删除按钮.

您可能会犹豫为列表中的每个项目呈现表单.它也不方便从内部编辑表格中嵌入.

在Bootstrap模式(确认删除框)和ajax提交的帮助下,我遇到了这个解决方案:

1. 让你deleteAction支持,GET以便它可以在必要时呈现表单.
2. 无论您何时需要删除链接,请将其作为模式的链接,然后加载deleteAction控制器以在模态体的一侧渲染表单.您也可以在模式中输入确认消息.
3. 提交模态表单时,相应地处理您的deleteAction脚本,然后重定向.

编辑:为Controller和添加脚本Template

/**
 * @Route("category/delete/{id}", name="category_delete")
 * @Method({"GET", "DELETE"})
 */
public function deleteAction(Request $request, $id)
{
    /*
     * Check Permission.
     */
    $response = array(
        'success' => true,
        'message' => '',
        'html' => '',
    );

    $repository = $this->getDoctrine()->getRepository('AppBundle:Category');
    $category = $repository->find($id);

    $form = $this->createDeleteForm($category);
    if ($request->getMethod() == 'DELETE') {
        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
            $em = $this->getDoctrine()->getManager();
            $em->remove($category);
            $em->flush();

            // Get response ready as per your need.
            $response['success'] = true;
            $response['message'] = 'Deleted Successfully!';
        } else {
            $response['success'] = false;
            $response['message'] = 'Sorry category could not be deleted!';
        }
        return new JsonResponse($response);

        // In case you want to redirect.
        // $this->addFlash('notice', 'Deleted Successfully!');
        // return $this->redirectToRoute('category_index');
    }
    $render = $this->render(':category:delete_confirm.html.twig', array(
        'delete_form' => $form->createView(),
        'category' => $category,
    ));

    $response['html'] = $render->getContent();

    return new JsonResponse($response);
}

Twig HTML代码返回Modal(我使用的是UIKIT模式)

{{ form_start(delete_form) }}
<div class="uk-modal-header">
    <h3 class="uk-modal-title">Delete this Category?</h3>
</div>
<p>
    Are you sure you want to delete  '{{ category.name }}'?<br/>
    This cannot be undone.
</p>
<div class="uk-modal-footer uk-text-right">
    <div>
        <button type="submit" class="md-btn md-btn-danger" title="Click to proceed!">
            <i class="uk-icon-trash"></i> Delete
        </button>
        <button type="button" class="md-btn md-btn-warning uk-modal-close">Cancel</button>
    </div>
</div>
{{ form_end(delete_form) }}

希望这可以帮助!