Advanced Stock Management was implemented in PrestaShop version 1.5 with the aim to bring inventory management on higher level. Using this useful functionality you will have more than physical stock of products you’ve got at hand, but items in numerous storage places/warehouses (if you are working with any).
By default this option is turned off and can be enabled upon desire and requirements of store owner.
“This Product is No Longer in Stock”. Why?
Despite of the fact that Prestashop Advanced Stock Management is definitely a step forward, since it offers the ability to get inventory movement statistics, it might confuse PrestaShop users right after enabling this functionality and assigning product to the warehouse. Most likely the first thing you see is that all of your products which had positive inventory value previously (quantity more than 0), became out of stock.
There is nothing wrong with that, do not worry. It works at it is supposed, since activating Advanced Stock Management expects from you that now product quantities will be taken from warehouses the product belong to. At the moment the product have quantity 0 at warehouse, thus became out of stock automatically.
How to Make Products In Stock Again?
Since at the moment the problem is caused by the fact that product belonging to certain warehouse has no quantity values indicated, so you need to enter stock for each product for which you are managing stock on the advanced level. For that you need to increase quantity values for selected products in ‘Stock Management’ tab.
Is Physical Stock Value Automatically Added to Item Quantity at Warehouse(s)?
The answer is no. Real physical stock you indicated for the product before is being completely ignored. In order to make your products available for purchase again you have to manually assign each to warehouse and indicate how many of this product is available at each storage place (Warehouse 1, Warehouse 2 etc.)
Is It Possible to Massively Indicate Product Quantity in Each Warehouse?
Taking into consideration the fact that the number of warehouses to which products can be assigned, as well as item quantity in each storage place and stock changes can be various and multiple, the procedure requires proper attention to be paid to each value entered. Besides, you need to indicate unit price for each product (required field). So at the moment there is no massive means to add or update warehouse stock.
This is how Advanced Stock Management works in PrestaShop back-end. Its behaviour is identical to the one in Store Manager for PrestaShop. So if you have faced the same situation and your products’ inventory turned to 0, do not panic. Just indicate product quantity for each warehouse and they will not only become online again, but also show you stock movement and any inventory changes taking place at your store!