How to filter products by subsection using smart filter (without adding a property)?

Question

1C-Bitrix

Good afternoon!
There was a need to refine the smart filter so that it filters not only by properties, but also by product subcategories. For example, there is a category Frying pans, subcategories - pancake pans, cast iron pans, etc.

By default, the smart filter does not filter by category. I tried to separately add to the form the previously received list of the necessary subcategories for selection and in the NEXT_SMART_FILTER array I added an array of conditions array('SECTION_ID' => '$_GET['sect_id']', 'INCLUDE_SUBSECTIONS'=>'Y'). Separately, all this works, but how beautifully and competently to add this array to the filter? Or perhaps there are other solutions to this problem?

In Google, I came across options only through the creation of a property (in this project, this option is not suitable). I also tried to send via $_GET, but the component is updated a couple of times (I look at the logs, the component works twice, and the second time all my values ​​​​are already empty), follows the link /filter/#SMART_FILTER_PATH#/apply and all my variables are lost.

I would be very grateful for your help.

Answer 1

there is a module that filters by sections
https://marketplace.1c-bitrix.ru/solutions/kombox....
example
https://filter.kombox.ru/tv/