Symfony2:重定向到最后一条路线并闪现一条消息? [英] Symfony2: Redirecting to last route and flash a message?

问题描述

我在 Symfony 2 中尝试闪现消息并将用户重定向回上一页时遇到了一个小问题.

I'm having a small problem when trying to flash a message and redirect the user back to the previous page in Symfony 2.

我有一个非常简单的 CRUD.新建或编辑时，如果相应的创建/更新方法出现问题，我想显示一条消息:

I have a very simple CRUD. When new, or edit, i want to flash a message if something goes wrong in the respective create/update methods:

1. 用户--GET-->新的
2. new --POST-->创建(失败)
3. --REDIRECT-->新的(带有快闪信息)

我正在做以下事情:

  $this->container->get('session')->setFlash('error', 'myerror');
  $referer = $this->getRequest()->headers->get('referer');   
  return new RedirectResponse($referer);

但是，它并没有重定向到正确的推荐人！即使引用的值是正确的(例如:http://localhost/demo/2/edit/)它也会重定向到索引.为什么?

However, it's not redirecting to the correct referrer! Even though the value of referrer is correct (eg.: http://localhost/demo/2/edit/) It redirects to the index. Why?

推荐答案

这是 Naitsirch 和 Santi 代码的替代版本.我意识到一个特征对于这个功能来说是完美的.也稍微优化了代码.我更喜欢返回包括 slug 在内的所有参数，因为您在生成路由时可能需要这些参数.

This is an alternative version of Naitsirch and Santi their code. I realized a trait would be perfect for this functionality. Also optimized the code somewhat. I preferred to give back all the parameters including the slugs, because you might need those when generating the route.

此代码在 PHP 5.4.0 及更高版本上运行.当然，您可以将 trait 用于多个控制器.如果您将特征放在单独的文件中，请确保将其命名为与特征相同的名称，遵循 PSR-0.

This code runs on PHP 5.4.0 and up. You can use the trait for multiple controllers of course. If you put the trait in a seperate file make sure you name it the same as the trait, following PSR-0.

<?php
trait Referer {
    private function getRefererParams() {
        $request = $this->getRequest();
        $referer = $request->headers->get('referer');
        $baseUrl = $request->getBaseUrl();
        $lastPath = substr($referer, strpos($referer, $baseUrl) + strlen($baseUrl));
        return $this->get('router')->getMatcher()->match($lastPath);
    }
}

class MyController extends Controller {
    use Referer;

    public function MyAction() {
        $params = $this->getRefererParams();

        return $this->redirect($this->generateUrl(
            $params['_route'],
            [
                'slug' => $params['slug']
            ]
        ));
    }
}

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