Adding multi language option to a symfony 3 project

Question

Reading the documentation of symfony 3, I got very confused, and I'm not sure if I'm doing everything right. This is how one of my normal controller looked at the start:

class IndexController extends Controller

    {
        /**
         * @Route("/", name="index")
         */
        public function indexAction(Request $request)
        {
            $articles = $this->getDoctrine()
                ->getRepository(Article::class)->findAll();

            return $this->render("index.html.twig", array(
                'articles' => $articles
            ));
        }
    }

I wanted to add option for multy language. Before symfony I saw doing this with simple saving in session the language, and a button for changing it. In symfony I added a translations folder, and a file for each language.

//messages.en.yml
    base.menu.1: Home
    base.menu.2: Products
    base.menu.3: Brands

//messages.bg.yml
    base.menu.1: Начало
    base.menu.2: Продукти
    base.menu.3: Марки

After this I saw in some titorial that I can add my _locale, in my route like this:
@Route("{_locale}/", name="index")
And this actually worked. My I could of change my home page's language by going in bg/, or en/.
But the locale variabe wasn't saved anywhere. If I went to other page, it doesn't know what language was setted up before. So I read more, and was I can fix this, by saving all of my routes in routing.yml like this:

index:
    path:     /{_locale}/
    defaults: { _controller: AppBundle:Index:index }
    requirements:
        _locale: '%app.locales%'

and then set up my config:

parameters:
    locale: bg
    app.locales: bg|en

framework:
    translator: { fallbacks: ['%locale%'] }

All this is working, except I have to move my routing from their controllers to routing.yml. I want to ask if this is the right method, to do all of this, because I'm not sure, the documentation isn't 100% clear (most likely I just cant understand it), and can't find any good titorials.

Answer 1

use the 'make locale sticky' method, as stated above,

then set the locale using

$request->setLocale($locale);
$request->getSession()->set('_locale', $locale);

//now redirect as the locale change will take affect on the next pageload

(set both, and redirect)