Sorting in catalog sections by availability in warehouses?

Question

1C-Bitrix

Good afternoon. There
is an exchange from 1s, from which ~ 100 warehouses for different cities come.
Goods are simple
. The city of the buyer is written to the session, the warehouse of his city is selected by this value and the available quantity is shown
.
the head comes only when exchanging with 1s, count the quantity in a particular city for each product and write it to the property, and then sort the goods by it.
Maybe there is a simpler / more correct way?

Answer 1

*CATALOG_STORE_AMOUNT_<warehouse_id> - sorting by quantity of goods in a particular warehouse (available since version 15.5.5 of the Trade catalog module).