I have an
entity_reference field that autocreates entities (i.e., the 'Create referenced entities if they don't already exist' option is enabled in the field's configuration). I'm looking for a way to set some values on those autocreated entities before they are saved (e.g., author, revision message, ...).
What I've tried so far:
hook_node_presave(), but there is no indication on the
$entityobject that it's being 'autocreated' through an entity reference field.
- I can see that the new entities are being autocreated in
\Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem::preSave, but it's not clear to me if/how I can override that method without implementing my own entity_reference field type.
Any suggestion for how to set values on an entity when it is being autocreated?