Overrides Drupal\Core\Entity\DataBaseStorageController::postSave().
Overrides DatabaseStorageController::postSave
protected function postSave(EntityInterface $entity, $update) {
parent::postSave($entity, $update);
$result = db_query('SELECT cid FROM {aggregator_category_feed} WHERE fid = :fid', array(
':fid' => $entity->fid->value,
));
foreach ($result as $category) {
db_merge('aggregator_category_item')
->key(array(
'iid' => $entity
->id(),
'cid' => $category->cid,
))
->execute();
}
}