The signature for EntityInterface::label():
/**
* Gets the label of the entity.
*
* @return string|\Drupal\Core\StringTranslation\TranslatableMarkup|null
* The label of the entity, or NULL if there is no label defined.
*/
public function label();
It allows an entity to return NULL as a label, which basically means that the entity does not have a label at all. EntityController uses this method for editing and deleting form page titles.
What it does is:
return $this->t('Edit %label', ['%label' => $entity->label()]);
But since
this change →
in Drupal 11, it is not allowed to use a NULL value as an argument value. That means these pages become unavailable because of this.
Create an entity with a label with a NULL value.
I've tried to create a fail test, and found that the entity_test entity type always gets its random label from somewhere else, even if the name field is explicitly set to NULL. This is likely an issue with the core tests, which are not detecting it. Not sure where to approach here.
Handle the NULL label in those methods. Something like:
public function editTitle(RouteMatchInterface $route_match, ?EntityInterface $_entity = NULL) {
if ($entity = $this->doGetEntity($route_match, $_entity)) {
$label = $entity->label() ?? $entity->getEntityType()->getSingularLabel();
return $this->t('Edit %label', ['%label' => $label]);
}
}
Active
11.0 🔥
entity system
If you apply this patch it solves the issue:
https://git.drupalcode.org/project/drupal/-/merge_requests/1657/diffs
Changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to our policies.