Silex: translation not working in Twig

Question

Currently, I develop a website by using the PHP micro-framework Silex . Now I try to use " TranslationServiceProvider " to translate my website into different languages. To achieve this, I have set the " locale " parameter :

$app->register(new Silex\Provider\TranslationServiceProvider(), array(
    'locale' => 'pt'
));

Then, in my controller, I call the function "setLocale", like this:

$app['translator']->setLocale('it');

Now, if I display, always in my controller, the result of the translation its works fine:

$app['translator']->trans("hello"); // return "Buongiorno" 
$app['translator']->getLocale(); // return "it"

But, if I call the same function in my template Twig, translation does not work:

{{ app.translator.trans('hello') }} // return: "Olá"
{{ app.request.locale }} // return: "pt"

So, I don't understand: translation works fine in my controller but when I want access translations in Twig, nothing happens.

Do you have any idea about what's going on?

Answer 1

Finally, I've found a solution to resolve my problem. In my "app.php" file, I have added the following code :

$app->before(function () use ($app) {
    if ($locale = $app['request']->get('lang') or $locale  = $app['request']->getSession()->get('_locale')) {
        $app['locale'] = $locale;
        $app['request']->setLocale($locale);
    }
});

Then, I've written a function in my controller to change language:

public function changeLanguageAction(Request $request, Application $app, $language)
{
    $app['request']->getSession()->set('_locale', $language);

    return $app->redirect($app["url_generator"]->generate('index'));
}

Now, when I call "changeLanguage" function, all the translations work fine.

I don't know if this solution is a good practice but it works...