In Magento 2.3 many stock related interfaces are deprecated since MSI is introduced. So I am trying to programmatically set that configurable product is in stock when any if its variations gets back in stock (using cron job that reads inventory data from ERP). The first thing I did was to set quantities and in stock status of each variation using SourceItemsSaveInterface. And this worked just fine. But then I tried to set the in stock status of the configurable product (it was still out of stock) so that customers can add this product to cart. I used the similar code as for each variation, which looked something like this:
/** @var SourceItemInterface $sourceItem */
$sourceItem = $this->sourceItemFactory->create();
$sourceItem->setSourceCode('default'); //We have only one (default) source
$sourceItem->setSku($sku); //Configurable product SKU
$sourceItem->setQuantity($totalQuantity); //Total quantity is the sum of all variation quantities
$sourceItem->setStatus($totalQuantity > 0 ? SourceItemInterface::STATUS_IN_STOCK : SourceItemInterface::STATUS_OUT_OF_STOCK);
$this->sourceItemsSaveInterface->execute([$sourceItem]);
Now after this code has been executed, the configurable product status is still not changed to In Stock for configurable products that should be in stock. So I checked some related database tables. And I found that cataloginventory_stock_item records are updated for variations, but not for the configurable product itself. Then I checked the inventory_source_item table, and found that there are valid records there for both configurable product and all of its variations.
So with the code above I managed only to insert a record into inventory_source_item table, but I did not manage to update cataloginventory_stock_item table, which I think Magento 2.3 still uses to check if product is out of stock when adding product to the cart. The final result is that customers are unable to add related product variation to the cart even when it is in stock.
My question is: what am I missing and how to set that configurable product is in stock programmatically to overcome this problem?
