How can I fix a deprecated user in Symfony 4?

Question

I get the following error message:

User Deprecated: Passing configuration options directly to the constructor is deprecated since Symfony 4.2, use the default context instead.

This is the code Symfony is giving as trace for the problem:

$serializer = new Serializer(array(new DateTimeNormalizer('d.m.Y'), new GetSetMethodNormalizer()), array('json' => new JsonEncoder()));

But I do not understand how to use a default context

Answer 1

You have to use directly the service.

class DefaultController extends AbstractController
{
    public function index(SerializerInterface $serializer)
    {
        // keep reading for usage examples
    }
}

https://symfony.com/doc/current/serializer.html