Magento 2.4 product stock status not change after salable quantity become zero

Question

I tried the below scenario in Magento 2.4.0 version

Anyone please try the below scenario in your Magento 2.4 version ?

I created one configurable product and it's two simple children with 100 qty.

Before Order place: I went to Admin Product Grid there are two columns Quantity and Salable Quantity. One child product has 100 Quantity and Salable Quantity are 100

After Placed order: In Admin product grid, same child product has salable quantity is 0 and quantity column shows 100 quantity and when I went product edit page it still shows in stock status even no backorders and Manages stock set to yes and I did reindex.

Expected Result: when the product becomes zero salable quantity it should automatically change stock status out of stock

Actual Result: when the product becomes zero salable quantity it does not change stock status from in stock to `out of stock

Anyone faces above issue in your Magento 2.4 version ?

Answer 1

In My Project, I am using external Stock so Order Invoices & shipments not happening at Magento's end, so I need to change the inventory based on order placement.

The following module works as you expect. If the customer places the order if qty 1 then this below module made that product stock status as "Out of Stock".

This module removes or disables the inventory reservation on order placement. You can find the order item qty decrement in order placement itself for qty & salable qty.

Magento 2 Module Source Link : https://github.com/AmpersandHQ/magento2-disable-stock-reservation

Please check the additional notes on the reference link.

Answer 2

There are some steps missing from the steps described, but the essential one is shipping items, if the order was placed but is still waiting to be shipped the product won't become out of stock, because it is still in your stock.

Here's a reference about the MSI workflow: How does the Magento salable quantity calculation work for merchants?

But if you use external systems to sync stock (as just salable items) or process your orders returns or shipments through a different system, then you need to disable the stock reservation, this module will handle it: https://github.com/AmpersandHQ/magento2-disable-stock-reservation

Answer 3

This is my hotfix.

Create extension Lexim_InventoryConfigurableProduct

etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Inventory\Model\SourceItem\Command\DecrementSourceItemQty">
        <plugin name="update_parent_configurable_product_stock_status_in_legacy_stock" disabled="true"/>
        <plugin name="update_parent_configurable_product_stock_status_in_legacy_stock_fix" type="Lexim\InventoryConfigurableProduct\Plugin\InventoryApi\UpdateParentStockStatusInLegacyStockPlugin"/>
    </type>
</config>

Plugin\InventoryApi\UpdateParentStockStatusInLegacyStockPlugin.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

namespace Lexim\InventoryConfigurableProduct\Plugin\InventoryApi;

use Magento\Framework\Exception\NoSuchEntityException;
use Magento\Inventory\Model\SourceItem\Command\DecrementSourceItemQty;
use Magento\InventoryApi\Api\Data\SourceItemInterface;
use Magento\InventoryCatalogApi\Api\DefaultSourceProviderInterface;
use Magento\InventoryCatalogApi\Model\GetProductIdsBySkusInterface;
use Magento\ConfigurableProduct\Model\Inventory\ChangeParentStockStatus;

/**
 * Apply a fix for update configurable product stock status in legacy stock
 * after decrement quantity of child stock item
 */
class UpdateParentStockStatusInLegacyStockPlugin
{
    /**
     * @var DefaultSourceProviderInterface
     */
    private $defaultSourceProvider;

    /**
     * @var ChangeParentStockStatus
     */
    private $changeParentStockStatus;

    /**
     * @var GetProductIdsBySkusInterface
     */
    private $getProductIdsBySkus;

    /**
     * @param DefaultSourceProviderInterface $defaultSourceProvider
     * @param GetProductIdsBySkusInterface $getProductIdsBySkus
     * @param ChangeParentStockStatus $changeParentStockStatus
     */
    public function __construct(
        DefaultSourceProviderInterface $defaultSourceProvider,
        GetProductIdsBySkusInterface $getProductIdsBySkus,
        ChangeParentStockStatus $changeParentStockStatus
    ) {
        $this->defaultSourceProvider = $defaultSourceProvider;
        $this->getProductIdsBySkus = $getProductIdsBySkus;
        $this->changeParentStockStatus = $changeParentStockStatus;
    }

    /**
     * Make configurable product out of stock if all its children out of stock
     *
     * @param DecrementSourceItemQty $subject
     * @param void $result
     * @param SourceItemInterface[] $sourceItemDecrementData
     * @return void
     * @throws NoSuchEntityException
     */
    public function afterExecute(DecrementSourceItemQty $subject, $result, array $sourceItemDecrementData): void
    {
        $productIds = [];
        $sourceItems = array_column($sourceItemDecrementData, 'source_item');

        /** @var SourceItemInterface $sourceItem */
        foreach ($sourceItems as $sourceItem) {
            $sku = $sourceItem->getSku();
            if ($sourceItem->getSourceCode() === $this->defaultSourceProvider->getCode()
                && $productId = ($this->getProductIdsBySkus->execute([$sku])[$sku] ?? null)
            ) {
                $productIds[] = (int) $productId;
            }
        }

        if ($productIds) {
            $this->changeParentStockStatus->execute($productIds);
        }
    }
}

registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Lexim_InventoryConfigurableProduct',
    __DIR__
);

module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="Lexim_InventoryConfigurableProduct" setup_version="1.0.0" />
</config>

I hope you can fix the error!