Ajax Sidebar Query

I’m doing some work on loading the sidebar widgets of the category pages with AJAX (Mainly because we’ve done some bench marking tests and worked out the Filtering by Attributes widgets are causing a major slow in the page loading times of category landing pages).

Anyway, I was wondering how the Filter by Attribute Widgets pull the current term slug from the current wp_query.

Initial problems I had were the current object didn’t exist because we were obviously going through the ajax url, I’ve managed to fix that by passing in the taxonomy name, and current term slug to execute a new WP_Query. This gives me all the correct post results and finds the correct filters & counts.

But the slugs are the only thing incorrect, the links for the attributes are replacing the current term slug with the base shop slug. e.g. The link “/product-category/lighting/pendant-lights/?filter_colour=black” is instead using “/shop/?filter_colour=black”

I believe the problem is because the ajax calls believes the current page is the “shop” page instead of a “category” page but I’m not sure which arguments of the wp_query object the widget uses to work this out