How to get node information in RouteSubscriberBase::alterRoutes

Bohus Ulrych

9/5/23, 12:13 PM

what I'm trying to achieve, is to for some specific nodes set admin theme. I have defined RouteSubscriberBase but how can I get node information here? This code is not working $node = \Drupal::routeMatch()->getParameter('node');

$route->getPath() will return /node/{node}

class RouteSubscriber extends RouteSubscriberBase
{

    /**
     * {@inheritdoc}
     */
    public function alterRoutes(RouteCollection $collection)
    {
        if ($route = $collection->get('entity.node.canonical')) {
            $node = \Drupal::routeMatch()->getParameter('node');
            // dpm($node); - this will be null
            if ($nid == 123) {
                $route->setOption('_node_operation_route', TRUE);
            }
        }
    }

}

Update: As mentioned bellow by @4uk4, RouteSubscriberBase is not right solution for this. As suggested ThemeNegotiatorInterface makes this job. Thank you, @4uk4!

0 + 0

routes

theme-negotiation

Vikram8888

9/5/23, 12:50 PM

As you said $route->getPath() will return /node/{node} ,by using explode function you can get the node id as a array format ,or try in such way $entity = \Drupal::routeMatch()->getParameter('node'); if ($entity instanceof \Drupal\node\NodeInterface) { // Check if it is a node $nid = $node->id(); // You also have the node object right here }

sonfd

9/5/23, 1:08 PM

You'll never be able to get a node ID here - this event will only fire when caches are cleared or when a module is enabled.

4uk4

9/5/23, 1:43 PM

If you want to choose a different theme for specific nodes you need a custom theme negotiator. See https://drupal.stackexchange.com/questions/281447/themenegotiator-not-working-for-admin-pages

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How to get node information in RouteSubscriberBase::alterRoutes

TH: วิธีรับข้อมูลโหนดใน RouteSubscriberBase::alterRoutes

RO: Cum să obțineți informații despre nod în RouteSubscriberBase::alterRoutes

RU: Как получить информацию об узле в RouteSubscriberBase::alterRoutes

VI: Cách lấy thông tin nút trong RouteSubscriberBase::alterRoutes

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