How to load product collection in Magento 2

Question

How to load product collection in Magento 2 and what is the difference between Magento 1 and Magento 2 load product collection

Answer 1

The standard collections are actually very similar. There are other similar structures, but for products you can load them in and load them just like Magento 1. Just like in Magento 1, if you are using the collection via iteration you do not have to load it as it's done implicitly.

As always in Magento 2, you should be injecting classes via dependency injection in your class constructor. Plus, if you are going to create more than one instance you can add "Factory" after any class and you'll get a wrapping class that allows you to generate as many as you want.

Here is the use of both together:

/** @var \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory */
protected $collectionFactory;

public function __construct(
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $collectionFactory
) {
    $this->collectionFactory = $collectionFactory;
}

public function yourMethod()
{
    // Use factory to create a new product collection
    $productCollection = $this->collectionFactory->create();
    /** Apply filters here */
    $productCollection->addAttributeToSelect('*');
    // Don't have to do this
    // $productCollection->load();

    foreach ($productCollection as $product){
         echo 'Name  =  '.$product->getName().'<br>';
    }  
}

With thanks to @megi for the example usage code in their answer.

Answer 2

 <?php
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
/** @var \Magento\Catalog\Model\ResourceModel\Product\Collection $productCollection */
$productCollection = $objectManager->create('Magento\Catalog\Model\ResourceModel\Product\Collection');
/** Apply filters here */
$collection = $productCollection->addAttributeToSelect('*')
            ->load();

foreach ($collection as $product){
     echo 'Name  =  '.$product->getName().'<br>';
}  
?>

Answer 3

Here is the best way to get product collection in magento

public function __construct(
        \Magento\Catalog\Model\Product $product
    )
{
    $this->product = $product;
}

public function getCollection()
{
    $collection = $this->product->create()->getCollection();
    return $collection;
}

public function loadProduct($id)
{
    $product = $this->product->create()->load($id);
    return $product;
}

In the magento 1 you can get collection using below code

$productCollection = Mage::getModel('catalog/product')->getCollection();

here we call Model catalog/product and then getCollection() method to get all product collection

In Magento 2 First we need to call class of product collection Magento\Catalog\Model\Product

then we need to call method create(); Magento 2's create method is same as Magento 1's getModel then we call collection.

Answer 4

=> Magento 1 :

$products = Mage::getModel('catalog/product')->getCollection();
foreach($products as $prod) {
$product = Mage::getModel('catalog/product')->load($prod->getId());
}

=> Magento 2 :

public function __construct(
    \Magento\Backend\Block\Template\Context $context,        
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,        
    array $data = []
)
{    
    $this->_productCollectionFactory = $productCollectionFactory;    
    parent::__construct($context, $data);
}

 public function getProductCollection()
{
    $collection = $this->_productCollectionFactory->create();
    $collection->addAttributeToSelect('*');
    $collection->setPageSize(3); // fetching only 3 products
    return $collection;
}

Answer 5

The best way to load the product collection using repositories in Magento 2 service contracts.

Inject the interface Magento\Catalog\Api\ProductRepositoryInterface in your constructor as follows

protected $productRepo; 

public function __construct(    
    \Magento\Catalog\Api\ProductRepositoryInterface $productRepo
) {
    $this->productRepo = $productRepo;
}

public function getProductById($itemId)
{
    return $this->productRepo->getById($itemId);
}

public function getProductBySku($sku)
{
    return $this->productRepo->get($sku);
}

Answer 6

Magento 2 getting the product is totally different from Magento 1. in Magento 1 we use this code to get the collection.

$productCollection = Mage::getModel('catalog/product')->getCollection();

To get product collection in Magento 2 use following code.

 protected $_productCollectionFactory;

 public function __construct(
        \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productFactory
    ) {
        $this->_productCollectionFactory = $productFactory;
    }
    public function getProductCollection()
    { 
      return   $this->_productCollectionFactory->create(); 

     }

Reference

Answer 7

Please follow the steps to load product collection: Step 1. Create your own block file

app/Code/Vendor/ModuleName/Block/ClassName.php

Copy Paste following code into your block file. protected $productCollectionFactory;

public function __construct(
    \Magento\Backend\Block\Template\Context $context,        
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,        
    array $data = []
)
{    
    $this->productCollectionFactory = $productCollectionFactory;    
    parent::__construct($context, $data);
}

public function getProductCollection()
{
    $collection = $this->productCollectionFactory->create();
    $collection->addAttributeToSelect('*');
    $collection->setPageSize(5); // Fetch Only 5 Products
    return $collection;
}

}

Step 2: Display product collection in phtml file

$productCollection = $block->getProductCollection(); foreach ($productCollection as $product) { print_r($product->getData()); }

Answer 8

Try this one it's working for me.

$_objectManager = \Magento\Framework\App\ObjectManager::getInstance();

$productCollection = $_objectManager->create('Magento\Catalog\Model\ResourceModel\Product\CollectionFactory');

$collection = $productCollection->create()

 ->addAttributeToSelect('*')

 ->addAttributeToFilter('status', '1')

 ->load();

Answer 9

---

1. List item

public function __construct(
    \Magento\Backend\Block\Template\Context $context,        
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,        
    array $data = []
)
{    
    $this->_productCollectionFactory = $productCollectionFactory;    
    parent::__construct($context, $data);
}

 public function getProductCollection()
{
    $collection = $this->_productCollectionFactory->create();
    $collection->addAttributeToSelect('*');
    return $collection;
}

Answer 10

You can load product collection From Helper also, so that You can use that collection anywhere.like thise...

<?php

namespace Vendor\Module\Helper;

use \Magento\Framework\App\Helper\AbstractHelper;

class Data extends AbstractHelper
 {
protected $_productCollectionFactory;

public function __construct(
    \Magento\Framework\App\Helper\Context $context,
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
    \
    array $data = []
)
{    
    $this->_productCollectionFactory = $productCollectionFactory;

    parent::__construct($context);
}

**/* Get full Products Collection*/**
public function getProductCollection()
{
    $collection = $this->_productCollectionFactory->create();
    $collection->addAttributeToSelect('*');
    $collection->setPageSize(6);
    return $collection;
}

}

Now if you want to call it in any phtml file you can achieve it easily like these.

<?php 
$helper = $this->helper('Vendor\Module\Helper\Data');
$collection = $helper->getProductCollection();

foreach ($collection as $product) {
                 $result = [
                    'id'        => $product->getId(),
                    '_sku'      => $product->getSku(),
                    'product_url' => $product->getProductUrl($product),
                    'title'     => $product->getName(),
                    'raw_price' => $product->getPrice()
                ];
?>
<span class="price">
<?= $result['raw_price'] ?>
</span>
<?php
}
?>