Multiple channels cannot be created without a default language defined in services.yaml (redirect to homepage at second channel)

[adamterepora]

I encountered a problem in which I have two channels:

1. Polish
2. English

Polish channel contains only polish lang, english has english only.

In the services.yaml file the default language is defined as pl_EN.
When I go to the english channel and try to go to payment, I am redirected to the home page.

The reason is routing configuration:

<?xml version="1.0" encoding="UTF-8" ?>

<routes xmlns="http://symfony.com/schema/routing" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/routing https://symfony.com/schema/routing/routing-1.0.xsd">
    <route id="payum_capture_do_session" path="/payment/capture/session-token">
        <default key="_controller">Payum\Bundle\PayumBundle\Controller\CaptureController::doSessionTokenAction</default>
    </route>

    <route id="payum_capture_do" path="/payment/capture/{payum_token}">
        <default key="_controller">Payum\Bundle\PayumBundle\Controller\CaptureController::doAction</default>
    </route>
</routes>

etc. for any other route in bundle.

Since in Sylius ShopBundle we have a method:

final class NonChannelLocaleListener
{
    ...

    /**
     * @throws NotFoundHttpException
     */
    public function restrictRequestLocale(RequestEvent $event): void
    {
        ...

        $requestLocale = $request->getLocale();
        if (!in_array($requestLocale, $this->channelBasedLocaleProvider->getAvailableLocalesCodes(), true)) {
            $event->setResponse(
                new RedirectResponse(
                    $this->router->generate(
                        'sylius_shop_homepage',
                        ['_locale' => $this->channelBasedLocaleProvider->getDefaultLocaleCode()],
                    ),
                ),
            );
        }
    }
}

everytime we are redirecting to payum routes, $request->getLocale() provides invalid locale, which causes redirect to homepage instead of payment proceeding.

Quick solution for this is to add /{_locale} in paths (system will automatically provide this locale from previous actions):

<?xml version="1.0" encoding="UTF-8" ?>

<routes xmlns="http://symfony.com/schema/routing" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://symfony.com/schema/routing https://symfony.com/schema/routing/routing-1.0.xsd">
    <route id="payum_capture_do_session" path="/{_locale}/payment/capture/session-token">
        <default key="_controller">Payum\Bundle\PayumBundle\Controller\CaptureController::doSessionTokenAction</default>
    </route>

    <route id="payum_capture_do" path="/{_locale}/payment/capture/{payum_token}">
        <default key="_controller">Payum\Bundle\PayumBundle\Controller\CaptureController::doAction</default>
    </route>
</routes>

for all routes included.