Change node author works :

$node = \Drupal\node\Entity\Node::load($nid);

But i don't know how to set it to anonymous user ? or unset it ?

 $node = \Drupal\node\Entity\Node::load($nid);
 // set uid to anonymous ?

$node->set('uid', 0); $node->save should have worked. Maybe you forgot to flush caches.

To programmatically set the author to anonymous user on any entity you can call $entitiy->setOwnerId(0); and then $entity->save();, done.

  • i figured out $node->set('uid', 0); $node->save worked indeed but the content was not listed on /admin/content because of the view relation with author. When opting out "Exiger cette relation" ,the content is there but the user column is empty instead of anonymous – Matoeil Apr 26 at 15:11
  • both options work then but the content author is not set to anonymous as it is when deleting content and reassiging using the backoffice. The consequence is the /admin/content view must be modified in order to see the reassigned content with ownerId 0 – Matoeil Apr 26 at 15:49

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