How to add parent terms of a taxonomy term?

Question

On my Drupal 9 site, I have an "Article" content type with a taxonomy reference field_tags.

This field is configured so that the user can choose the appropriate term from a drop-down list. In this vocabulary I have terms and child terms.

Here's what I'm looking to do:

• term1
• term 2
  • term 3
  • term 4
• term 5

If the content creator selects term 4, I want term 2 and term 4 to be referenced.

How do I add the parent terms of a taxonomy term?

I couldn't find a contributed module to do this. The writer should select the category from the drop-down list and the parent terms should be added automatically.

I tested the Taxonomy Term Reference Tree Widget module. Unfortunately it does not suit me.

• The editor must select only one term.
• Parent terms should be added automatically and should not be unselectable.
• A node must only belong to a child term. It should not be only with the terms "Culture geek", "On se déconfine", "Consommer local" or "La communauté".

I just want a drop-down where it is possible to select a single taxonomy term and have the parents added automatically. If I change my term, the parents need to be updated.

Answer 1

Have you tried the Simple hierarchical select module? https://www.drupal.org/project/shs

It is worth giving it a go-to see if its fits in your user case.