如何在symfony 2中创建映射到外部URL的路由？

Question

Referring to this,

http://symfony.com/doc/current/book/routing.html

we can map url pattern to controller and action

app/config/routing.yml

blog_show:
    path:      /blog/{slug}
    defaults:  { _controller: AcmeBlogBundle:Blog:show }

I want to map the path to external url.

app/config/routing.yml

blog_show:
    path:      /blog/{slug}
    defaults:  "www.example.com/blog"

The requirement is, my current website is in kohana, I am porting it gradually to symfony 2. For my symfony2 app kohana URL are like external urls, I want to configure these urls in routing and use them in standard way,

e.g. in Twig,

<a href="{{ path('blog_show'}}">
  Read this blog post.
</a>

So later on when I port my pages to Symfony, I will have to change only routing file so that I could use same blog_show key to refer to url and I wont' have to change all the files where I have used urls.

Answer 1

The router feature of Symfony doesn't work that way...

I suggest you create a Twig extension for this. Read more about this here: http://symfony.com/doc/current/cookbook/templating/twig_extension.html

You could create a function that works very similar to the regular url() function, so you can migrate as easily as possible.

{{ legacyUrl('blog_post', {slug: 'my-blog-post'}) }}

After you migrated the blog to Symfony, all you need to do is create a route called "blog_post" and change "legacyUrl" to "url".