如何使用Symfony Decorator模式更改Twig功能? [英] How to use Symfony Decorator pattern to change a Twig function?

问题描述

我正在尝试更改 {{url('app_route_name')}}或{{path('app_route_name')}} 的输出.通常，输出可能是/app/route/name 我只想修改树枝输出.

I'm trying to change the output of {{ url('app_route_name') }} or {{ path('app_route_name') }}. Normally the output might be /app/route/name I'm wanting to modify the twig output only.

我的第一次尝试是修饰UrlGenerator-> generate，但是更改$ name也会更改所调用的控制器.我只想更改最终输出.

My first attempt was decorating UrlGenerator->generate, but changing $name also changed the controller called. I just want to change the final output.

这是我当前正在尝试的代码.我收到的错误异常是:

Here is the code I'm currently trying. The error exception I'm getting is:

未知的路径"；功能.您是说"logout_path"，"relative_path"，"impersonation_exit_path"吗?

Unknown "path" function. Did you mean "logout_path", "relative_path", "impersonation_exit_path"?

    App\Service\TwigUrlDecorator:
        decorates: 'twig.extension.routing'
        arguments: ['@.inner']
        public: false

// src/Service/TwigUrlDecorator.php

namespace App\Service;

use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
use Twig\Extension\AbstractExtension;
use Symfony\Bridge\Twig\Extension\RoutingExtension;

class TwigUrlDecorator extends AbstractExtension
{
    private $generator;
    private $router;

    public function __construct(RoutingExtension $router, UrlGeneratorInterface $generator)
    {
        $this->router = $router;
        $this->generator = $generator;
    }

    public function getPath(string $name, array $parameters = [], bool $relative = false): string
    {
        return $this->generator->generate($name, $parameters, $relative ? UrlGeneratorInterface::RELATIVE_PATH : UrlGeneratorInterface::ABSOLUTE_PATH);
    }

    public function getUrl(string $name, array $parameters = [], bool $schemeRelative = false): string
    {
        return $this->generator->generate($name, $parameters, $schemeRelative ? UrlGeneratorInterface::NETWORK_PATH : UrlGeneratorInterface::ABSOLUTE_URL);
    }

}

我最初的问题可能会为我所寻找的内容提供一些背景知识

My original question might shed some background on what I'm looking for.

推荐答案

您在哪里定义了Twig函数 path ?您已经修饰了 twig.extension.routing 而不定义任何Twig函数.当前，调用了AbstractExtension的方法 getFunctions ，这将返回一个空的函数列表.

Where did you define the Twig function path? You've decorated twig.extension.routing without defining any Twig functions. Currently, the method getFunctions of the AbstractExtension is called, and this returns an empty list of functions.

与装饰中的常规方法一样:如果要在原始服务上执行任何方法，则需要路由此类调用.这样的事情可能会有所帮助:

As usual in decoration: if you want to execute any methods on the original service, you need to route such calls through. Something like this might help:

public function getFunctions(): array {
  return $this->router->getFunction();
}

---

此外，您应该检查属性的命名.在当前状态下， $ router 不包含任何路由器，但包含用于路由的Twig扩展名.在我看来，这很令人困惑，因为适当的路由器将提供与Twig扩展完全不同的方法

---

Additionally, you should check the naming of the properties. In the current state, $router does not contain any router, but the Twig extension for routing. To me, this looks pretty confusing, as a proper router would provide completely different methods than a Twig extension does

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