JSON Product endpoint

ProductController.php

<?php
// URL: http://bit.ly/dcon-sf-json
// src/DrupalCon/FirstBundle/Controller/ProductController.php

use Symfony\Component\HttpFoundation\Response;

// ...

class ProductController extends Controller
{

    // copy this function (and comments) to the TOP of your existing ProductController class

    /**
     * Finds and displays a Product entity.
     *
     * @Route("/products/{id}.json", name="product_show_json")
     * @Method("GET")
     */
    public function showJsonAction($id)
    {
        $em = $this->getDoctrine()->getManager();

        /** @var Product $product */
        $product = $em->getRepository('FirstBundle:Product')->find($id);

        if (!$product) {
            throw $this->createNotFoundException('Unable to find Product entity.');
        }

        $data = array(
            'id' => $product->getId(),
            'name' => $product->getName(),
            'price' => $product->getPrice(),
        );
        $json = json_encode($data);

        return new Response($json);
    }
}