Select Random Products magento 2.3

Question

I want to display random products on my homepage. I have been using this $collection->clear()->getSelect()->order('rand()');. My aim is the products should be displayed randomly on every page refresh. But here, this happens only after i clear cache and then refresh my page. Without cache flush, it displays same products

Answer 1

Add this line in your collection

$collection->getSelect()->orderRand();

If you are facing the cache issue, you can use in your layout file

cacheable="false";

Blocks can be set as non-cacheable by setting the cacheable attribute false in layout XML files. For example

<block class="Block\Class" name="blockname" cacheable="false" />

Answer 2

$productsCol = $this
        ->getCategory($id)
        ->getProductCollection()
        ->addAttributeToSelect('*')
        ->setPageSize(3);

$productsCol->getSelect()->orderRand();

$products = $productsCol->getItems();

Please check with this whole code.

I hope it will help you.

Answer 3

Add This Block In Home Page And Check :-

{{block class="Magento\Catalog\Block\Product\ProductList\Random" template="product/list.phtml" num_products="12"}}

Answer 4

The best idea to Ajax, On the load of this page, call a page with a POST request and return Magento\Catalog\Block\Product\ProductList\Random block content.

As Magento does calculate post request as cacheable request, So don't get any issue with the cache.

Controller Class RandomList.php

<?php

namespace StackExchange\Magento\Controller\Example;

use Magento\Framework\App\ResponseInterface;
use Magento\Framework\Controller\ResultInterface;
use Magento\Framework\View\Result\Layout;
use Magento\Framework\Controller\ResultFactory;

class RandomList  extends \Magento\Framework\App\Action\Action
{

    public function execute() 
    {
        $this->resultFactory->create(ResultFactory::TYPE_LAYOUT);
    }

}

layout files {routeID}_example_randomList.xml and code is

And code:

<?xml version="1.0"?>

<layout xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/layout_generic.xsd">
    <container name="root">
        <block class="MStackExchange\Magento\Block\Product\ProductList\Random" name="product.info.random.prp" as="products_random" template="Magento_Catalog::product/list/items.phtml" />
          <arguments>
                    <argument name="type" xsi:type="string">new</argument>
                </arguments>
    </container>
</layout>

Block Class

<?php
namespace StackExchange\Magento\Block\Product\ProductList;

use Magento\Catalog\Api\CategoryRepositoryInterface;

/**
 * Catalog product random items block
 *
 * @SuppressWarnings(PHPMD.LongVariable)
 */
class Random extends \Magento\Catalog\Block\Product\AbstractProduct implements
    \Magento\Framework\DataObject\IdentityInterface
{

    /**
     * @var \Magento\Catalog\Model\Product\Visibility
     */
    private $catalogProductVisibility;

    /**
     * Product collection factory
     *
     * @var \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory
     */
    protected $_productCollectionFactory;

    /**
     * @var CategoryRepositoryInterface
     */
    protected $categoryRepository;



    /**
     * @param \Magento\Catalog\Block\Product\Context $context
     * @param \Magento\Framework\Data\Helper\PostHelper $postDataHelper
     * @param CategoryRepositoryInterface $categoryRepository
     * @param \Magento\Framework\Url\Helper\Data $urlHelper
     * @param \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory
     * @param array $data
     */
    public function __hconstruct(
        \Magento\Catalog\Block\Product\Context $context,
        \Magento\Framework\Data\Helper\PostHelper $postDataHelper,
        CategoryRepositoryInterface $categoryRepository,
        \Magento\Framework\Url\Helper\Data $urlHelper,
        \Magento\Catalog\Model\Product\Visibility $catalogProductVisibility,    
        \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
        array $data = []
    ) {
        $this->_productCollectionFactory = $productCollectionFactory;
        parent::__construct($context, $data);
        $this->catalogProductVisibility = $catalogProductVisibility;
    }

    /**
     * @return \Magento\Catalog\Model\ResourceModel\Product\Collection
     */
    protected function _getProductCollection()
    {
        if ($this->_productCollection === null) {
            /** @var \Magento\Catalog\Model\ResourceModel\Product\Collection $collection */
            $collection = $this->_productCollectionFactory->create();
            $collection->setVisibility($this->_catalogProductVisibility->getVisibleInCatalogIds());
             $collection = $this->_addProductAttributesAndPrices(
            $collection
             );
            $collection->getSelect()->order('rand()');
            $collection->addStoreFilter();

            $collection->setPage(1, 10);

            $this->_productCollection = $collection;
        }
        return $this->_productCollection;
    }

    /**
     * Return identifiers for produced content
     *
     * @return array
     */
    public function getIdentities()
    {
        return ['ran_products'];
    }
    /**
     * Prepare collection with new products
     *
     * @return \Magento\Framework\View\Element\AbstractBlock
     */
    protected function _beforeToHtml()
    {
        $this->setProductCollection($this->_getProductCollection());
        return parent::_beforeToHtml();
    }    
}