Called a function of an entity in twig - symfony

Question

I'm looking to retrieve information from an entity by twig by passing the id as a parameter. But I block on the function in my entity:
My entity (function need call):
public function getNameFournisseur($id)
{
???
}
My twig:
{{ staticFournisseur.getNameFournisseur(idFournisseur) }}
My controller:
/**
* #Route("/new", name="new_invoice", methods={"GET","POST"})
*/
public function new(Request $request, SessionInterface $session, ArticlesRepository $articlesRepository, FournisseursRepository $fournisseursRepository): Response
{
$invoice = new Invoice();
$form = $this->createForm(InvoiceType::class, $invoice);
$form->handleRequest($request);
$articles = $session->get('articleInvoice', []);
$articleData = [];
foreach ($articles as $k => $article) {
$articleData [] = [
'articleInvoice' => $articlesRepository->find($k),
'quantityInvoice' => $article
];
}
$total = 0;
foreach ($articleData as $totalArticle) {
$totalArticles = $totalArticle['articleInvoice']->getPrice() * $totalArticle['quantityInvoice'];
$total += $totalArticles;
}
$session->set('totalHt', $total);
$totalAllArticles = $session->get('totalHt');
$tauxDiscount = $session->get('discountTaux');
if (!$tauxDiscount) {
$totalWithDiscount = $total;
} else {
$totalWithDiscount = $totalAllArticles - ($totalAllArticles * $tauxDiscount) / 100;
}
if ($form->isSubmitted()) {
//$session->remove('idFournisseur');
$id_fournisseur = (int)$request->request->get('order')['fournisseur_id'];
$fournisseur = $fournisseursRepository->findOneBy(['id' => $id_fournisseur]);
$entityManager = $this->getDoctrine()->getManager();
$entityManager->persist($invoice);
$entityManager->flush();
return $this->redirectToRoute('invoices');
}
return $this->render('admin/invoices/new.html.twig', [
'staticFournisseur' => new Fournisseur(),
'idFournisseur' => $session->get('idFournisseur'),
'discountTaux' => $tauxDiscount,
'totalHt' => $totalWithDiscount,
'art' => $articleData,
'form' => $form->createView()
]);
}
I therefore seek to recover the name of the supplier thanks to the id that I pass as a parameter in my twig.

Answer 1

getNameFournisseur($id) is a function that retrieves data from the database, not from a single (already loaded) entity; in other words, it should be in FournisseursRepository instead
Also, if you're using Doctrine, you usually want to load the full entity instead of just a field
'staticFournisseur' => $fournisseursRepository->findOneById($session->get('idFournisseur'));
and in twig:
{{ staticFournisseur.getName() }}
or even
{{ staticFournisseur.name }}