Updating an entity’s field values

In this recipe, we will define a route to update the field values of an article node. The route will be for an HTTP PATCH request sending JSON to specify a new title and body text.

How to do it…

1. Create an update method in the ArticleController controller that receives the incoming request and node object:

   <?php

   namespace Drupal\mymodule\Controller;

   use Drupal\Core\Controller\ControllerBase;

   use Drupal\node\NodeInterface;

   use Symfony\Component\HttpFoundation\JsonResponse;

   use Symfony\Component\HttpFoundation\Request;

   class ArticleController extends ControllerBase {

     public function update(Request $request,

       NodeInterface $node): JsonResponse {

     }

   }

We need the request object so that we can retrieve the JSON payload provided to this method and the node object to update.

2. Next, we will convert the request’s content from JSON to a PHP array using Drupal’s JSON serialization...