Drupal - How do I get the current node ID?
The parameter will have been upcasted from nid to full node object by the time you get access to it, so:
$node = \Drupal::routeMatch()->getParameter('node');
if ($node instanceof \Drupal\node\NodeInterface) {
// You can get nid and anything else you need from the node object.
$nid = $node->id();
}
See the change record for more information.
It is correct to use \Drupal::routeMatch()->getParameter('node')
. If you just need the node ID, you can use \Drupal::routeMatch()->getRawParameter('node')
.
if you are using or creating custom block then you have to follow this code to get current url node id.
// add libraries
use Drupal\Core\Cache\Cache;
// code to get nid
$node = \Drupal::routeMatch()->getParameter('node');
$node->id() // get current node id (current url node id)
// for cache
public function getCacheTags() {
//With this when your node change your block will rebuild
if ($node = \Drupal::routeMatch()->getParameter('node')) {
//if there is node add its cachetag
return Cache::mergeTags(parent::getCacheTags(), array('node:' . $node->id()));
} else {
//Return default tags instead.
return parent::getCacheTags();
}
}
public function getCacheContexts() {
//if you depends on \Drupal::routeMatch()
//you must set context of this block with 'route' context tag.
//Every new route this block will rebuild
return Cache::mergeContexts(parent::getCacheContexts(), array('route'));
}