Symfony i18n routes: partial language support

Question

I have a few dozen routes defined as follows:

services:
    path:
        en: /en/services
        de: /de/dienstleistungen
    controller: App\Controller\SimplePageController::page

This is using the Localized routing which I believe was introduced in Symfony 4.1.

The routes all have paths for both English and German. Now I want to translate a few specific pages in some other languages. For instance my homepage. The problem is that if I add another language to the route of my homepage, it will not load since it can't create links to other pages that do not have a route defined in this new language.

If I visit /nl/homepage, the following link generation in Twig fails

<link href="{{ path('services') }}">

with the error

Unable to generate a URL for the named route "services" as such route does not exist.

How can I tell Symfony to create links to the English routes if the current language does not have a route for it? Or even better, specify some dynamic path along the lines of:

services:
    path:
        en: /en/services
        de: /de/dienstleistungen
        default: /$1/services
    controller: App\Controller\SimplePageController::page

Edit: I am now using Symfony 5.0.4 and still have the same problem.

Did you read : https://phrase.com/blog/posts/symfony-4-i18n/ — Weenesta - Mathieu Dormeval, Feb 23 '20 at 10:28
I did. It does not show routing fallback from languages not defined at all for a route. Even so I tried to adapt this to routes.yml syntax (so no controller annotations) and got the same errors I got before posting here on SO. — Jeroen De Dauw, Feb 26 '20 at 04:47
I believe you should provide example twig code that actually creates a problem. It's not on the question, and may be part of the reason you are not getting useful answers. — yivi, Feb 28 '20 at 10:46

Kurano · Answer 1 · 2020-02-26T12:33:30.977

Isn't this is what you are looking for ?

# config/packages/translation.yaml
framework:
    translator:
        fallbacks: ['en']

It will tell you if the language isn't defined to use the 'en' as default fallback.

EDIT: Then you might try to use some kind of workaround like this but not sure if this is what you are looking for

# config/services.yaml
parameters:
    app.localesForSpecificRouting: en|de
    app.localesForAnotherSpecificRouting: en|de|fr

Then in your controller you could load specific languages for specific routes

/**
 * @Route("/{_locale}/routing1", name="routing1", requirements={
 *     "_locale"="%app.localesForSpecificRouting%"
 * })
 */
 public function routing1(){...}

 /**
 * @Route("/{_locale}/routing2", name="routing2", requirements={
 *     "_locale"="%app.localesForAnotherSpecificRouting%"
 * })
 */
 public function routing2(){...}

We have such a fallback already. This works for regular messages but as far as I can tell it has no impact on routing. — Jeroen De Dauw, Feb 26 '20 at 04:28
@JeroenDeDauw I edited to add an other idea for you. But it's not the exact same way that you are using. — Kurano, Feb 26 '20 at 12:34

Weenesta - Mathieu Dormeval · Answer 2 · 2020-02-29T12:55:52.237

I'm not sure I understood the problem correctly, but I tested this code locally:

# config/routes.yaml
routing-test:
  path:
    en: /{_locale}/services
    de: /{_locale}/dienstleistungen
  controller: App\Controller\SimplePageController::page
  defaults:
    _locale: '%kernel.default_locale%'
  requirements:
    _locale: ^[a-z]{2}?$

This code results matched URLs, for example :

URL typed: /nl/services 

Matched: routing-test.en /{_locale}/services 
_locale: "nl"

One another test :

URL typed: /fr/dienstleistungen

Matched: routing-test.de /{_locale}/dienstleistungen 
_locale: "fr"

Could you tell me if it helped you ?

EDIT:

Ok, I think I understood a little better, What I tried :

Routing:

# config/routes.yaml
homepage:
    path:
       en: /{_locale}/homepage
       fr: /{_locale}/accueil
    controller: App\Controller\SimplePageController::index
    defaults:
      _locale: '%kernel.default_locale%'
    requirements:
      _locale: ^[a-z]{2}?$

services:
    path:
       en: /{_locale}/services
       de: /{_locale}/dienstleistungen
    controller: App\Controller\SimplePageController::services
    defaults:
      _locale: '%kernel.default_locale%'
    requirements:
      _locale: ^[a-z]{2}?$

Templating:

{# templates/test-routing/index.html.twig #}
{% set locale = app.request.get('_locale') in ['en', 'de'] ? app.request.get('_locale') : 'en' %}
<a href="{{ path('services', { '_locale' : locale }) }}">Routing test</a>

I don't think there is any better way to achieve this goal, not to my knowledge...

The issue is not getting the routing itself to work. It is getting Symfony to create links to routes. I added emphasis to my post now. This twig code fails with your example when visiting /nl/whatever: {{ path('routing-test') }}. Error is: Unable to generate a URL for the named route "routing-test" as such route does not exist. — Jeroen De Dauw, Feb 28 '20 at 05:14

Symfony i18n routes: partial language support

2 Answers2