When trying to delete taxonomy terms using Taxonomy Manager (without checking "Delete children of selected terms"), the following error occurs:
Error: Call to undefined method Drupal\taxonomy\TermStorage::deleteTermHierarchy() in Drupal\taxonomy_manager\TaxonomyManagerHelper->deleteTerms() (line 272 of /opt/httpd/htdocs/staging/arrpracticed11/master/web/modules/contrib/taxonomy_manager/src/TaxonomyManagerHelper.php).
The method `deleteTermHierarchy()` (and `updateTermHierarchy()`) do not exist in Drupal core's `TermStorage` class.
Proposed Fix:
Remove these lines from `TaxonomyManagerHelper.php`
After doing this, the child terms are retained and their parent is correctly reset to target_id => 0.
this->taxonomyTypeManager->deleteTermHierarchy([$child->id()]);
$this->taxonomyTypeManager->updateTermHierarchy($child);Active
2.0
Code
I am not able to replicate this. I used a DrupalPod instance with D10.5.1 and module v2.0.0. Followed the steps above; error did not occur when deleting child term (with "delete children" unchecked OR checked), nor would it occur when deleting a parent term (with "delete children" unchecked OR checked).