стандарте модель product возвращает
return array(
'product_id' => $query->row['product_id'],
'name' => $query->row['name'],
'description' => $query->row['description'],
'meta_title' => $query->row['meta_title'],
'meta_description' => $query->row['meta_description'],
'meta_keyword' => $query->row['meta_keyword'],
'tag' => $query->row['tag'],
'model' => $query->row['model'],
'sku' => $query->row['sku'],
'upc' => $query->row['upc'],
'ean' => $query->row['ean'],
'jan' => $query->row['jan'],
'isbn' => $query->row['isbn'],
'mpn' => $query->row['mpn'],
'location' => $query->row['location'],
'quantity' => $query->row['quantity'],
'stock_status' => $query->row['stock_status'],
'image' => $query->row['image'],
'manufacturer_id' => $query->row['manufacturer_id'],
'manufacturer' => $query->row['manufacturer'],
'price' => ($query->row['discount'] ? $query->row['discount'] : $query->row['price']),
'special' => $query->row['special'],
'reward' => $query->row['reward'],
'points' => $query->row['points'],
'tax_class_id' => $query->row['tax_class_id'],
'date_available' => $query->row['date_available'],
'weight' => $query->row['weight'],
'weight_class_id' => $query->row['weight_class_id'],
'length' => $query->row['length'],
'width' => $query->row['width'],
'height' => $query->row['height'],
'length_class_id' => $query->row['length_class_id'],
'subtract' => $query->row['subtract'],
'rating' => round($query->row['rating']),
'reviews' => $query->row['reviews'] ? $query->row['reviews'] : 0,
'minimum' => $query->row['minimum'],
'sort_order' => $query->row['sort_order'],
'status' => $query->row['status'],
'date_added' => $query->row['date_added'],
'date_modified' => $query->row['date_modified'],
'viewed' => $query->row['viewed']
);
то есть num_up здесь нет