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    Magento Product Thumbnail in Catalog Related Tab

    Updated 7 November 2012

    Magento Product Thumbnail in Catalog Related Tab – Magento does not provide the feature of showing thumbnails in product related tab so here is the simple hack for this

    Go To  this location /app/code/core/Mage/Adminhtml/Block/Catalog/Product/Edit/Tab and open related.php  

    and add this function under _addColumnFilterToCollection()

    protected function _prepareCollection()
        {
            $collection = Mage::getModel('catalog/product_link')->useRelatedLinks()
                ->getProductCollection()
                ->setProduct($this->_getProduct())
                ->addAttributeToSelect('*')
    			->addExpressionAttributeToSelect('thumbnail',
    "CONCAT('<img src=http://www.example.com/media/catalog/product',{{thumbnail}},
    ' width=80px>')",'thumbnail');
    
            if ($this->isReadonly()) {
                $productIds = $this->_getSelectedProducts();
                if (empty($productIds)) {
                    $productIds = array(0);
                }
                $collection->addFieldToFilter('entity_id', array('in' => $productIds));
            }
    
            $this->setCollection($collection);
            return parent::_prepareCollection();
        }

    Here www.example.com is your domain name for the store . enjoy 🙂

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