symfony3 session parameter: adress['livraison'] give null value - symfony

Question

I am experimenting with the implementation of ecommerce "DevAndClick". I cannot retrieve the delivery and billing addresses, and the session address[livraison] displays a null value. I am blocked. Has anyone ever met this problem that can help me?
Here is code of the form of the Twig view:
<form action="{{path('validation')}}" method="POST">
<h4>Adresse de livraison</h4>
{% for adresse in utilisateur.adresses %}
<label class="radio">
<input type="radio" name="livraison" value="{{adresse.id}}" {% if loop.index0 == 0 %} checked="checked" {% endif %} >
{{adresse.adresse}} , {{adresse.cp}} {{adresse.ville}}-{{adresse.pays}}<i class="icon-trash"></i> <br />
{{adresse.prenom}} {{adresse.nom}}
</label>
{% endfor %}
<br /><br />
<h4>Adresse de facturation</h4>
{% for adresse in utilisateur.adresses %}
<label class="radio">
<input type="radio" name="facturation" value="{{adresse.id}}" {% if loop.index0 == 0 %} checked="checked" {% endif %} >
{{adresse.adresse}} , {{adresse.cp}} {{adresse.ville}}-{{adresse.pays}}<i class="icon-trash"></i> <br />
{{adresse.prenom}} {{adresse.nom}}
</label>
{% endfor %}
<button class="btn btn-primary">Valider mes adresse </button>
</form>
Here are the two methods of my controller:
public function setLivraisonOnSession(Request $request)
{
$session = $request->getSession();
if(!$session->has('adresse')) $session->set('adresse',array());
$adresse = $session->get('adresse');
if($request->request->get('livraison') != null && $request->request->get('facturation') != null )
{
$adresse['livraison'] = $request->request->get('livrasion');
$adresse['facturation'] = $request->request->get('facturation');
}
else{
return $this->redirect($this->generateUrl('validation'));
}
$session->set('adresse',$adresse);
return $this->redirect($this->generateUrl('validation'));
}
public function validationAction(Request $request)
{
if($request->isMethod('POST'))
$this->setLivraisonOnSession($request);
$em = $this->getDoctrine()->getManager();
$session = $request->getSession();
$adresse = $session->get('adresse');
//var_dump($adresse['livraison']);
// die();
$produits = $em->getRepository('EcommerceBundle:Produits')->findArray(array_keys($session->get('panier')));
$livraison = $em->getRepository('EcommerceBundle:UtilisateursAdresses')->find($adresse['livraison']);
$facturation = $em->getRepository('EcommerceBundle:UtilisateursAdresses')->find($adresse['facturation']);
return $this->render('EcommerceBundle:Default/panier/layout:validation.html.twig',array(
'produits' => $produits,
'livraison'=> $livraison,
'facturation'=>$facturation,
'panier'=>$session->get('panier')
));
}

Answer 1

Confirm that you have initialized your variable $adresse as an array before using it, like below:
$adresse = array();