How to load products media gallery along with the collection?

Can anybody give me a hint about how to load product's media gallery along with the collection?

I'm getting the collection like this:

$collection = Mage::getModel('catalog/product')->getCollection()
                        ->addStoreFilter($storeId)
                        ->addAttributeToFilter('status', Mage_Catalog_Model_Product_Status::STATUS_ENABLED);
foreach ($collection as $product) {
    var_dump($product->getMediaGalleryIm开发者_JS百科ages());
}

But getMediaGalleryImages() returns null. I know that I can load each product separately with $product = Mage::getModel('catalog/product')->load($product->getId()) but I want to avoid this, because it causing unnecessary workload.

In case anyone’s looking for another approach on this, I found this to work (in just one case so no guarantees!):

Be sure to do $collection->addAttributeToSelect(’image’); first, then when looping through the collection products, do:

$attributes = $product->getTypeInstance(true)->getSetAttributes($product);
$media_gallery = $attributes[’media_gallery’];
$backend = $media_gallery->getBackend();
$backend->afterLoad($product); //this loads the media gallery to the product object

Not sure if all of this is necessary but I’m in a hurry. In my particular case I was trying to get the image url using $product->getImageUrl(); and this approach worked for me.

Hope it helps someone else.

I had to do the same recently, fastest method:

class My_Module_Block_Name extends Mage_Catalog_Block_Product_View_Abstract
{

/** @var null|Mage_Catalog_Model_Resource_Eav_Attribute */
protected static $_mediaGalleryBackend = null;

public function getGalleryImages()
{
    $product = $this->getProduct();
    $this->_getBackend()->afterLoad($product);
    $collection = $product->getMediaGalleryImages();

    return $collection;
}


/**
 * @return Mage_Catalog_Model_Resource_Eav_Attribute
 */
protected function _getBackend() {
    if (self::$_mediaGalleryBackend === null) {

        $mediaGallery = Mage::getSingleton('eav/config')
            ->getAttribute(Mage_Catalog_Model_Product::ENTITY, 'media_gallery');

        self::$_mediaGalleryBackend = $mediaGallery->getBackend();
    }

    return self::$_mediaGalleryBackend;
}

}

try this

$collection = Mage::getModel('catalog/product')->getCollection()
                        ->addStoreFilter($storeId)
                        ->addAttributeToSelect(array('image', 'media_gallery'))
                        ->addAttributeToFilter('status', Mage_Catalog_Model_Product_Status::STATUS_ENABLED);
foreach ($collection as $product) {
    var_dump($product->getMediaGallery());
}

It can be used directly in loop:

foreach ($collection as $product) {
    $product->getResource()->getAttribute('media_gallery')->getBackend()->afterLoad($product);
    foreach ($product->getMediaGalleryImages() as $image) {
        var_dump($image->debug());
    }
}

You are going to have to use:

// Returns the Media Gallery Images
Mage::getModel(’catalog/product’)->load(productid)->getMediaGalleryImages();

Reference: http://www.magentocommerce.com/boards/viewthread/29639/

The secret sauce when working with custom collections involving products is the third parameter of init method... at least it was for me. This way I don't need to load the whole product and run expensive queries.

So, having my custom $product which represents an instance of Mage_Catalog_Model_Product but from my custom collection, I can do:

(string)Mage::helper('catalog/image')->init($product, 'small_image', $product->getImage())

I also needed to add the image attribute to my custom collection, and I did that by adding ->addAttributeToSelect(['image']) to it.

You can also resize your image accordingly:

(string)Mage::helper('catalog/image')->init($product, 'small_image', $product->getImage())->resize($width, $height=null)

Here is a function to add the media gallery to a collection:

// Source: http://www.magentocommerce.com/boards/viewthread/17414/#t141830

public function addMediaGalleryAttributeToCollection(Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection $_productCollection) {
    $_mediaGalleryAttributeId = Mage::getSingleton('eav/config')->getAttribute('catalog_product', 'media_gallery')->getAttributeId();
    $_read = Mage::getSingleton('core/resource')->getConnection('catalog_read');

    $_mediaGalleryData = $_read->fetchAll('
        SELECT
            main.entity_id, `main`.`value_id`, `main`.`value` AS `file`,
            `value`.`label`, `value`.`position`, `value`.`disabled`, `default_value`.`label` AS `label_default`,
            `default_value`.`position` AS `position_default`,
            `default_value`.`disabled` AS `disabled_default`
        FROM `catalog_product_entity_media_gallery` AS `main`
            LEFT JOIN `catalog_product_entity_media_gallery_value` AS `value`
                ON main.value_id=value.value_id AND value.store_id=' . Mage::app()->getStore()->getId() . '
            LEFT JOIN `catalog_product_entity_media_gallery_value` AS `default_value`
                ON main.value_id=default_value.value_id AND default_value.store_id=0
        WHERE (
            main.attribute_id = ' . $_read->quote($_mediaGalleryAttributeId) . ') 
            AND (main.entity_id IN (' . $_read->quote($_productCollection->getAllIds()) . '))
        ORDER BY IF(value.position IS NULL, default_value.position, value.position) ASC    
    ');

    $_mediaGalleryByProductId = array();
    foreach ($_mediaGalleryData as $_galleryImage) {
        $k = $_galleryImage['entity_id'];
        unset($_galleryImage['entity_id']);
        if (!isset($_mediaGalleryByProductId[$k])) {
            $_mediaGalleryByProductId[$k] = array();
        }
        $_mediaGalleryByProductId[$k][] = $_galleryImage;
    }
    unset($_mediaGalleryData);
    foreach ($_productCollection as &$_product) {
        $_productId = $_product->getData('entity_id');
        if (isset($_mediaGalleryByProductId[$_productId])) {
            $_product->setData('media_gallery', array('images' => $_mediaGalleryByProductId[$_productId]));
        }
    }
    unset($_mediaGalleryByProductId);

    return $_productCollection;
}

An example of it's usage below:

$products = Mage::getModel('catalog/product')->getCollection()->addAttributeToSelect('*');
$this->addMediaGalleryToArray($products);