Sorting error when using fts-alfresco

[chrisried]

There seems to be an issue with trying to sort on a base model field when I use a custom aspect in my query. This is the query I am trying to run:

var def = {
	query: 'TYPE:"cm:person" AND gf:userOrgs:RECEIVERORG',
	store: "workspace://SpacesStore",
	language: "fts-alfresco",
	page: {
		maxItems: 100,
		skipCount: 0
	},
	sort: [{
		column: 'cm:userName', 
		ascending: true
	}]
 };

var result = search.query(def);

The sort works fine when I "userName" as sort but as soons as I user "firstName" or "email" it fails. If I remove gf;userOrgs from the query it works fine. It gives the following error in the logs:

Caused by: org.alfresco.repo.search.impl.lucene.LuceneQueryParserException: 04270500 Request failed 500 /solr/alfresco/afts?wt=json&fl=DBID%2Cscore&rows=100&df=TEXT&start=0&locale=en_US&alternativeDic=DEFAULT_DICTIONARY&sort=cm%3AfirstName+asc&fq=%7B%21afts%7DAUTHORITY_FILTER_FROM_JSON&fq=%7B%21afts%7DTENANT_FILTER_FROM_JSON

My gf:userOrgs has been defined as an array on the user:

Collection
RECEIVERORG
CREATORORG

Any help would be appreciated, thanks.

[chrisried]

I believe this is the solution. https://angelborroy.wordpress.com/2020/05/22/sorting-users-by-firstname-and-lastname-fields-in-alfre...