How to access the slug for a reference field in a collection list?

Design help CMS
1

In a collection list, you can access a referenced item’s fields, but not its slug.

I have a subcategory collection that has a single reference to category. I’m trying to build a breadcrumb structure with a link using the category slug, and a second link using the subcategory slug. Adding the subcategory collection, I can build the second link and display the first, but not link it, because I can only access the category’s name and other fields, and not it’s slug. Thoughts?

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2

Much simpler to solve this by using redirects on the collection template pages themselves.

On the category page, redirect to the homepage with the query param:
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On the subcategory template page, redirect to the homepage with both query params:
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You can access the referenced item’s slug in the page’s custom code, which solves the original problem.