Hi @jakegonzales
I believe the code you described only lists the stockist custom posts on the Promotions page. I think you can get the same result by using this code:
$relationships = get_field("stockists_participating");.
If you want to group the returned posts from above code, you need to check each of them and group it in an array.
$thepost_terms = get_the_terms($thepost->ID, 'countries');
Is used to get all of the terms that belong to a post. After that, you need to loop trough the terms and add a group if it does not exist yet. So if you have a promotion page with these posts in the relationship field:
Post 1: term 1, term 2
Post 2: term 2, term 3
Post 3: term 1
Post 4: term 3
Post 5: term 4, term 5
The result would be like this:
Term 1: Post 1, Post 3
Term 2: Post 1, Post 2
Term 3: Post 2, Post 4
Term 4: Post 5
Term 5: Post 5
Is that what you want?
If you don’t have time to learn about PHP, I suggest you hire a developer to help you out with it, and I’d recommend looking for one on https://studio.envato.com/ or https://www.upwork.com/.
I hope this helps 🙂
