How does \Magento\Eav\Model\ResourceModel\Entity\Attribute\Collection::addAttributeGrouping() work?

dmitry_fedyuk · April 29, 2016, 6:51pm

Context: How does \Magento\Eav\Model\AttributeRepository::getList() work?

magento/magento2/blob/958164/app/code/Magento/Eav/Model/ResourceModel/Entity/Attribute/Collection.php#L276-L286


/**
 * Declare group by attribute id condition for collection select
 *
 * @return $this
 * @codeCoverageIgnore
 */
public function addAttributeGrouping()
{
    $this->getSelect()->group('main_table.attribute_id');
    return $this;
}

Details: How does \Zend_Db_Select::group() work?