How can I set the subscription block to be shown based on product quantity?
Starting with version 1.20.0 it is possible to subscribe to stock notifications based on product quantity instead of stock status. The feature works with backorder and pre-order products, including those managed by Amasty Pre Order. You need to install the 'amasty/module-xnotif-stock-availability-mode' package from composer suggest to use this functionality (the functionality is available as a part of an active product subscription or support subscription).
Once installed, you can find the 'Check Stock Availability Based On' setting in the module configuration (Amasty > Out of Stock Notifications > Configuration > Stock Subscription):
This setting does not affect the display of the Add to Cart button. It only controls the display of the subscription block from the module.
- If Check Stock Availability Based On is set to Stock Status, the module works as it does now. The product stock is determined by the stock status: In Stock or Out of Stock. The subscription block is displayed only for products with the Out of Stock status.
- If Check Stock Availability Based On is set to Quantity, the module checks the product stock as follows.
When Magento Inventory modules are disabled the product is considered in stock if: Qty > Minimum Stock Quantity. The product is considered out of stock if: Qty < Minimum Stock Quantity.
When Magento Inventory modules are enabled the product is considered in stock if: Salable Quantity > 0. The product is considered out of stock if: Salable Quantity < 0.