How to get stock quantity of each product in Magento 2

Question

How to get stock quantity of each product in list.phtml in Magento 2 ?

Answer 1

Solution:1

Create Helper file Stock.php in your module

<?php
namespace {VendorName}\{ModuleName}\Helper;

class Stock extends \Magento\Framework\App\Helper\AbstractHelper
{
    /**
     * @var Magento\CatalogInventory\Api\StockStateInterface
     */
    protected $stockState;

    /**
     * Output constructor.
     * @param \Magento\Framework\App\Helper\Context $context
     * @param \Magento\CatalogInventory\Api\StockStateInterface $stockState
     */
    public function __construct(
        \Magento\Framework\App\Helper\Context $context,
        \Magento\CatalogInventory\Api\StockStateInterface $stockState
    ) {
        $this->stockState = $stockState;
        parent::__construct($context);
    }

    /**
     * Retrieve stock qty whether product
     *
     * @param int $productId
     * @param int $websiteId
     * @return float
     */
    public function getStockQty($productId, $websiteId = null)
    {
        return $this->stockState->getStockQty($productId, $websiteId);
    }
}

After add bellow code in your list.phtml file

$websiteId = 1;  // Current websiteId
$productId = 2; // $_product->getId()  Product Id
$_helperStock = $this->helper({VendorName}\{ModuleName}\Helper\Stock::class);
echo $_helperStock->getStockQty($productId, $websiteId);

Solution:2

Add bellow code in your list.phtml file

<?php 
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $StockState = $objectManager->get('\Magento\CatalogInventory\Api\StockStateInterface');
    echo $StockState->getStockQty($product->getId(), $product->getStore()->getWebsiteId());
?>

OR

<?php
   $stockItem = $product->getExtensionAttributes()->getStockItem();
   print_r($stockItem->getQty()); 
?>

Answer 2

Like some comments have mentioned, you want to use dependency injection. Do not use the object manager; in other words, do not do what any of the other responses state. The following technique can be applied anywhere. For Blocks, set the class to your class in layout XML, which extends the original, and inject the right information.

Inject the StockRegistryInterface interface where you need access:

/**
 * @var \Magento\CatalogInventory\Api\StockRegistryInterface
 */
private $stockRegistry;

/**
 * Constructor for DI.
 *
 * @param \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry
 */
public function __construct(
    \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry
) {
    $this->stockRegistry = $stockRegistry;
}

/**
 * Get the product stock data and methods.
 *
 * @return \Magento\CatalogInventory\Api\StockRegistryInterface
 */
public function getStockRegistry()
{
    return $this->stockRegistry;
}

To use it somewhere:

/** @var \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry */
$stockRegistry = [$this|$block]->getStockRegistry();

/** @var \Magento\Catalog\Model\Product $product */
$product = [Grab Product instance however you want. This is up to you.]

// Get stock data for given product.
$productStock = $stockRegistry->getStockItem($product->getId());

// Get quantity of product.
$productQty = $productStock->getQty();

For reference, Magento2 uses this exact interface all over the catalog when it comes to retrieving product stock information.

Note that anything within square brackets needs to be modified.

Answer 3

How to get stock quantity of each product in Magento 2

for controller or block inject \Magento\CatalogInventory\Api\StockStateInterface

 public function __construct(
    \Magento\CatalogInventory\Api\StockStateInterface $stockItem
   )
  {
    $this->stockItem = $stockItem;
  }

and then use getStockQty function to get qty

 $this->stockItem->getStockQty($product->getId(), $product->getStore()->getWebsiteId());

if you want to get quantity in .phtml file then use

 <?php 
 $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
 $StockState = $objectManager->get('\Magento\CatalogInventory\Api\StockStateInterface');
 echo $StockState->getStockQty($product->getId(), $product->getStore()->getWebsiteId());
?>

Answer 4

Below script will helpful to get the product stock qty, min qty and stock details in magento2.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$productStockObj = $objectManager->get('Magento\CatalogInventory\Api\StockRegistryInterface')->getStockItem($productId);
print_r($productStockObj->getData());

Answer 5

If you want to $productobj after saving product from backend side so you can easily use catalog_product_save_after event.

I am assuming that you already know how to create a module in M2.

Right now you have to need develop new module for M2

Then Create this events.xml file in below path

app\code\YOUR_NAMESPACE\YOURMODULE\etc\adminhtml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="catalog_product_save_after">
        <observer name="test_name" instance="YOUR_NAMESPACE\YOUR_MODULENAME\Observer\Productsaveafter" />
    </event>
</config>

And Create your observer file Productsaveafter.php in below path

app\code\YOUR_NAMESPACE\YOURMODULE\Observer\

<?php

namespace YOURNAMESPACE\YOURMODULENAME\Observer;

use Magento\Framework\Event\ObserverInterface;

class Productsaveafter implements ObserverInterface
{    
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $product = $observer->getEvent()->getProduct();
        $id = $product->getId(); //Get Product Id

        //Get Quantity
        $stockItem = $product->getExtensionAttributes()->getStockItem();
        $stockData = $stockItem->getQty();
        // Get new Qty
        $_vendor_qty = $product->getVendorQty();
        $_on_hand_qty = $product->getOnHandQty();
        $totalQty = $_vendor_qty+$_on_hand_qty; //Add New Qty


        $stockItem->setQty($totalQty); //Set New Qty to Main Qty
        $stockItem->save();

    }   
}

Answer 6

If you have the product object and do not want to use the other classes, You can try in the following way.

// For phtml file
$prodObj = $_product->load($_product->getId()); // $_product object in list.phtml
$stockItem = $prodObj->getExtensionAttributes()->getStockItem();
$stockQty = $stockItem->getQty(); // $stockItemData = $stockItem->getData();

// For php class file
$stockItem = $prodObj->getExtensionAttributes()->getStockItem();
$stockQty = $stockItem->getQty(); // $stockItemData = $stockItem->getData();