如何在shopware6中将类别id发送给ajax，并根据该id展示产品？

{% block content %}
  <div>
    <select id="categorySelect">
      {% for category in categories %}
        <option value="{{ category.id }}">{{ category.name }}</option>
      {% endfor %}
    </select>
    <button onclick="getProducts()">Get Products</button>
  </div>
  <div id="productContainer">
    <!-- Products will be displayed here -->
  </div>

  <script>
    function getProducts() {
      var categoryId = document.getElementById('categorySelect').value;

      // Send AJAX request to fetch products based on category ID
      // You can use any AJAX library or native JavaScript methods

      // Example using jQuery AJAX
      $.ajax({
        url: '/get-products',
        type: 'POST',
        data: { category_id: categoryId },
        success: function(response) {
          // Handle the response and display products
          var products = JSON.parse(response);
          var productContainer = document.getElementById('productContainer');

          // Render products in the productContainer
          // You can use any front-end framework or native JavaScript to render the products
        }
      });
    }
  </script>
{% endblock %}

use Shopware\Core\Framework\Routing\Annotation\RouteScope;
use Shopware\Core\Framework\Routing\Annotation\Route;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\HttpFoundation\Request;

/**
 * @RouteScope(scopes={"api"})
 */
class ProductController extends AbstractController
{
  /**
   * @Route("/get-products", name="get_products", methods={"POST"})
   */
  public function getProducts(Request $request): JsonResponse
  {
    $categoryId = $request->request->get('category_id');

    // Use the received category ID to fetch products from the database
    // You can use Shopware's EntityRepository or any other ORM methods

    // Example code using Shopware's EntityRepository
    $entityManager = $this->container->get('doctrine.orm.default_entity_manager');
    $productRepository = $entityManager->getRepository(ProductEntity::class);
    $products = $productRepository->findBy(['categoryId' => $categoryId]);

    // Return the products as JSON response
    return new JsonResponse(json_encode($products));
  }
}