How to get taxonomy tree with path auto token?

Question

I'm using Path auto module to automatically set url of articles. Last part of url is node title and [node:title] works just fine. But url part before node title should follow taxonomy structure (tree) of tag used for tagging that article (taxonomy name: "structural_category".

So i.e. if article is tagged with tag "Child" and that tag has parent tag called "Parent" then url of my article should be:

/parent/child/node-title

I can get only Child tag with tokens like this: [node:field_structural_category:0], but I don't see the way to get Child's tag parent with token. With "Browse available tokens" I just can't drill any deeper than tag which is used directly for tagging the article.

For Drupal 7 I found that there is a solution with "join" keyword, something like:

[term:taxonomy_name:join:/]/[term:name]

What are the URL Alias pattern replacements for taxonomy parent terms when building up Node paths?

And I know that for Drupal 8 there should be something like:

[term:parent:url:path]/[term:name]

But when I try to save pattern like that I get an error "Path pattern is using the following invalid tokens:..."

When I use "Available tokens" helper tool I don't see this "term" at all?! All I see is:

There's no a word on "join", "parent" or any other similar token.

Answer 1

Found it. Token should look like:

[node:field_structural_category:entity:parents]

It appeared (I think) after I changed reference field from multiple to accept only one value.

While it was accepting multiple values I could access first 3 elements, but not their parents. So this option is available only for single value fields. I see that lot of tokens are missing when tag reference field is set to accept multiple values. Bug or feature - can't say.