config.yml

fos_rest:
    routing_loader:
        default_format: json
        include_format: false
    view:
        formats:
            json: true
    body_listener: true
    format_listener:
        rules:
            - { path: ^/api, priorities: ['json'], fallback_format: json, prefer_extension: false }

    disable_csrf_role: ROLE_API
    exception:
        codes:
            'Symfony\Component\Routing\Exception\ResourceNotFoundException': 404
            'Doctrine\ORM\OptimisticLockException': HTTP_CONFLICT
        messages:
            'Symfony\Component\HttpKernel\Exception\NotFoundHttpException': true