I need to get product collection by filter multiple category ids in magento 2

Question

I need to get product collection by filter multiple category ids.

Here is my code:

$catId = [2, 3, 5];
$productcollection = $objectmanager->create('\Magento\Catalog\Model\ResourceModel\Product\CollectionFactory');

$categoryProducts = $productcollection->addAttributeToSelect('*')
    ->addAttributeToSort('position', 'ASC')
    ->addCategoriesFilter(['in' => $catId])
    ->addAttributeToFilter('color', ['in', $colorValues]);

But this code is not working.

Answer 1

Actually you pass the category ids array in addCategoriesFilter(['in' => $cat_ids]) that's why the error occur. Just Replace my code with your's

$cat_ids = "2,3,5";
$productcollection = $objectmanager->create('Magento\Catalog\Model\ResourceModel\Product\Collection');
$categoryProducts = $productcollection->addAttributeToSelect('*')->addAttributeToSort('position', 'ASC')->addCategoriesFilter(['in' => $cat_ids])->addAttributeToFilter('color', array('in',$colorvalues));

I hope this will help

Answer 2

You can add the other attribute filter. I just check multiple category filter. It is working, I just Created object again after loading model collection.

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

$cat_ids = [179,109];

$categoryProducts = $productcollection->addAttributeToSelect('*');
$categoryProducts->addCategoriesFilter(array('in' => $cat_ids));

echo '<pre>';
echo count($categoryProducts);
//var_dump($categoryProducts);
foreach ($categoryProducts as $product) {
print_r($product->getData());
}
echo '</pre>';

Answer 3

protected $_productCollectionFactory;

public function __construct(
    \Magento\Framework\App\Helper\Context $context,
    \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory
) {
    parent::__construct($context);
    $this->_productCollectionFactory = $productCollectionFactory;
}
public function getProductCollectionByCategories()
{
    $categories = [2,3,5];//category ids array
    $collection = $this->_productCollectionFactory->create();
    $collection->addAttributeToSelect('*');
    $collection->addCategoriesFilter(['in' => $categories]);
    return $collection;
}