I'm having an issue with Magento trying to make a join on my collection, here's the problem:

Actually I've got a custom table named product_banner which I'm getting by:

$collection = Mage::getModel('mymodule_productbanner/productbanner')->getCollection();

But I need to join this table with catalog_category_entity_varchar, I've tried solution:

    $catalogTable = Mage::getSingleton('core/resource')->getTableName('catalog/category');

    $collection = Mage::getModel('exablack_productbanner/productbanner')->getCollection()->getSelect()->join(array('category' => $catalogTable),
        'main_table.category_id = category.entity_id AND category.attribute_id = 41');

But for no avail... The pure sql query I need to run to get my desired result would be:

    select catalog_category_entity_varchar.value, product_banner.banner_url, 
    product_banner.text from product_banner inner join catalog_category_entity_varchar 
    on product_banner.category_id = catalog_category_entity_varchar.entity_id and 
    catalog_category_entity_varchar.attribute_id = 41;

How can I achieve this with magento collections?

1 Answer 1


Please try with below code as I haven't run a query on MySQL because I have no any custom module table include with category id field but I build it based on your collection

$collection =

$attribute =

     ->join(array('category_varchar' => $attribute->getBackendTable()),'category_varchar.entity_id=
     ->where('category_varchar.attribute_id = ?',$attribute->getId());

echo $collection->getSelect();

and run this query on MySQL.Hope it will work for you.

  • Your solved my problem, thanks a lot +1 Commented May 11, 2018 at 14:56
  • @PedrodeAlbuquerque accept him to answer if really help you. so it will help others. Commented May 12, 2018 at 4:48

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