php – 如何为特定的控制器操作创建异常事件侦听器,使用其原始参

使用类似的东西：

<?php

namespace AppBundleEventListener;

use SymfonyComponentHttpFoundationRedirectResponse;
use SymfonyComponentHttpKernelEventGetResponseForExceptionEvent;
use SymfonyComponentRoutingRouterInterface;
use DoctrineORMNoResultException;

class ExceptionResponseListener
{
    public function __construct(RouterInterface $router)
    {
        $this->router = $router;
    }

    /**
     * @param GetResponseForExceptionEvent $event
     */
    public function onKernelResponse(GetResponseForExceptionEvent $event)
    {
        $request = $event->getRequest();
        $routeName = $request->get('_route');
        $exception = $event->getException();

        // Restrict the route by adding a check on the route name
        // Or a pattern of route names (!strpos($routeName,'_show'))
        // Or for many routes: (!in_array($routeName,['xxx_show',...]
        // Or the _controller: $request->get('_controller')
        // Output something like: "AcmeBundleControllerDefaultController::showAction"
        if ('expected_route_name' !== $routeName) {
            return;
        }    

        // Retrieve your param
        $params = $request->get('_route_params');

        if ($exception instanceof NoResultException) {
            // Create a redirection to the edit route
            $response = new RedirectResponse(
                $this->router->generate('your_edit_route',array('id' => $params['id']))
            );

            $event->setResponse($response);
        }
    }
}

并将其注册为服务：

services:
    # ...
    acme.kernel.listener.exception_listener:
        class: AppBundleEventListenerExceptionResponseListener
        tags:
            - {name: kernel.event_listener,event: kernel.exception,method: onKernelResponse}
        arguments: ['@router']

另一个简单的替代方法是直接在您的方法中进行预期操作的转发/重定向,而不是抛出异常.