When I foreach my collection filtered by tier price, qty and customer group I get the error: "Item (Magento \ Catalog \ Model \ Product \ Interceptor) with the same ID already exists".

This is my class:

namespace Vendor\Module\Block;
class ProductCollection extends \Magento\Framework\View\Element\Template

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 getProductCollectionSearch() {
        $collection = $this->_productCollectionFactory->create();

        $collection->getSelect()->join('catalog_product_index_price as price_index', 'e.entity_id = price_index.entity_id'); 
        $collection->getSelect()->join('catalog_product_entity_tier_price as tier', 'price_index.entity_id = tier.entity_id');

            ->where('tier.all_groups = 0')
            ->where('tier.qty = 1000')
            ->where('tier.value <= 0.20');

        return $collection;

This problem arises when I try to foreach product in my phtml file. This is my phtml file:

$blockProductColl = $block->getLayout()->createBlock('\Vendor\Module\Block\ProductCollection');
$collectionSearch = $blockProductColl->getProductCollectionSearch();


//echo $collectionSearch->getSize();
foreach($collectionSearch as $itemSearch){
    echo $itemSearch->getSku().'<br/>';

Is there a way to exclude duplicate Item IDs before foreaching the collection? Thanks!


public function getProductCollectionSearch() {
        $collection = $this->_productCollectionFactory->create();
        $collection->addAttributeToFilter('visibility', 4);
        $joinConditions = 'e.entity_id = tier.entity_id';
             'catalog_product_entity_tier_price as tier',
              ->where('tier.customer_group_id = 0')
              ->where('tier.qty = 1000')
              ->where('tier.value <= 0.10')
              ->where('tier.website_id = 0');
         return $collection;

1 Answer 1


please add

       ->where('tier.website_id = 0');
  • or you can check here rscoder.com/2019/12/18/… May 20, 2021 at 10:19
  • Man i tried to add ->where('tier.website_id = 0'); but issue remain. I don't know whether to try the module you suggested because my collection, if I don't join the table, works correctly. Can I do it any other way in your opinion? Thx
    – Jackom
    May 20, 2021 at 10:27
  • Man, i tried in this moment and now works! works! works! Thans for the help! I updated my code for the final solution ;)
    – Jackom
    May 20, 2021 at 10:43
  • happy to hear it works for you :) May 20, 2021 at 10:45
  • One last questione please: If i set for example ->where('tier.qty = 50500') and this qty not exist in my tier price quantity table, how can i make him take the amount range rounded down, ie 50000 that exists in my database?
    – Jackom
    May 21, 2021 at 10:14

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