Minicarro que exibe a imagem do produto pai em vez da imagem do produto

Eu tenho um código que exibirá um produto no carrinho de compras usando ajax, quando um cliente clicar em Adicionar ao carrinho. O problema é que ele não está exibindo a imagem do produto filho até que eu faça uma atualização dessa página; em vez disso, ele mostra a Imagem do produto pai. Eu entrei no back-end e alterei "Imagem configurável do produto" e "Imagem agrupada do produto" para exibir a imagem do produto, no entanto, parece que o código abaixo está ignorando essas configurações:

<?php
    $_item = $this->getItem();
    $isVisibleProduct = $_item->getProduct()->isVisibleInSiteVisibility();
    $canApplyMsrp = Mage::helper('catalog')->canApplyMsrp($_item->getProduct(), Mage_Catalog_Model_Product_Attribute_Source_Msrp_Type::TYPE_BEFORE_ORDER_CONFIRM);
?>
<li class="item">
    <?php if ($this->hasProductUrl()): ?>
        <a href="<?php echo $this->getProductUrl()?>" title="<?php echo $this->htmlEscape($this->getProductName()) ?>" class="product-image"><img src="<?php echo $this->getProductThumbnail()->resize(50, 50)->setWatermarkSize('30x10'); ?>" width="50" height="50" alt="<?php echo $this->htmlEscape($this->getProductName()) ?>" /></a>
    <?php else: ?>
        <span class="product-image"><img src="<?php echo $this->getProductThumbnail()->resize(50, 50)->setWatermarkSize('30x10'); ?>" width="50" height="50" alt="<?php echo $this->htmlEscape($this->getProductName()) ?>" /></span>
    <?php endif; ?>
    <div class="product-details">
                <p class="product-name"><?php if ($this->hasProductUrl()): ?><a href="<?php echo $this->getProductUrl() ?>"><?php endif; ?><?php echo $this->htmlEscape($this->getProductName()) ?><?php if ($this->hasProductUrl()): ?></a><?php endif; ?></p>
        <strong><?php echo $this->getQty() ?></strong> x

    <?php if ($canApplyMsrp): ?>

        <span class="map-cart-sidebar-item"><?php echo $this->__('See price before order confirmation.'); ?></span>

    <?php else: ?>

    <?php if ($this->helper('tax')->displayCartPriceExclTax() || $this->helper('tax')->displayCartBothPrices()): ?>
        <?php if ($this->helper('tax')->displayCartBothPrices()): ?>
            <?php echo $this->__('Excl. Tax'); ?>:
        <?php endif; ?>
        <?php if (Mage::helper('weee')->typeOfDisplay($_item, array(0, 1, 4), 'sales')): ?>
            <?php echo $this->helper('checkout')->formatPrice($_item->getCalculationPrice()+$_item->getWeeeTaxAppliedAmount()+$_item->getWeeeTaxDisposition()); ?>
        <?php else: ?>
            <?php echo $this->helper('checkout')->formatPrice($_item->getCalculationPrice()) ?>
        <?php endif; ?>
        <?php if (Mage::helper('weee')->getApplied($_item)): ?>
            <br />
            <?php if (Mage::helper('weee')->typeOfDisplay($_item, 1, 'sales')): ?>
                <small>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount'],true,true); ?></span><br />
                <?php endforeach; ?>
                </small>
            <?php elseif (Mage::helper('weee')->typeOfDisplay($_item, 2, 'sales')): ?>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><small><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount_incl_tax'],true,true); ?></small></span><br />
                <?php endforeach; ?>
            <?php elseif (Mage::helper('weee')->typeOfDisplay($_item, 4, 'sales')): ?>
                <small>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount_incl_tax'],true,true); ?></span><br />
                <?php endforeach; ?>
                </small>
            <?php endif; ?>
            <?php if (Mage::helper('weee')->typeOfDisplay($_item, 2, 'sales')): ?>
                <span class="nobr"><?php echo Mage::helper('weee')->__('Total'); ?>:<br /> <?php echo $this->helper('checkout')->formatPrice($_item->getCalculationPrice()+$_item->getWeeeTaxAppliedAmount()+$_item->getWeeeTaxDisposition()); ?></span>
            <?php endif; ?>
        <?php endif; ?>
    <?php endif; ?>



    <?php if ($this->helper('tax')->displayCartPriceInclTax() || $this->helper('tax')->displayCartBothPrices()): ?>
        <?php $_incl = $this->helper('checkout')->getPriceInclTax($_item); ?>
        <?php if ($this->helper('tax')->displayCartBothPrices()): ?>
            <br /><?php echo $this->__('Incl. Tax'); ?>:
        <?php endif; ?>
        <?php if (Mage::helper('weee')->typeOfDisplay($_item, array(0, 1, 4), 'sales')): ?>
            <?php echo $this->helper('checkout')->formatPrice($_incl+$_item->getWeeeTaxAppliedAmount()); ?>
        <?php else: ?>
            <?php echo $this->helper('checkout')->formatPrice($_incl-$_item->getWeeeTaxDisposition()) ?>
        <?php endif; ?>
        <?php if (Mage::helper('weee')->getApplied($_item)): ?>
            <br />
            <?php if (Mage::helper('weee')->typeOfDisplay($_item, 1, 'sales')): ?>
                <small>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount'],true,true); ?></span><br />
                <?php endforeach; ?>
                </small>
            <?php elseif (Mage::helper('weee')->typeOfDisplay($_item, 2, 'sales')): ?>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><small><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount_incl_tax'],true,true); ?></small></span><br />
                <?php endforeach; ?>
            <?php elseif (Mage::helper('weee')->typeOfDisplay($_item, 4, 'sales')): ?>
                <small>
                <?php foreach (Mage::helper('weee')->getApplied($_item) as $tax): ?>
                    <span class="nobr"><?php echo $tax['title']; ?>: <?php echo Mage::helper('checkout')->formatPrice($tax['amount_incl_tax'],true,true); ?></span><br />
                <?php endforeach; ?>
                </small>
            <?php endif; ?>
            <?php if (Mage::helper('weee')->typeOfDisplay($_item, 2, 'sales')): ?>
                <span class="nobr"><?php echo Mage::helper('weee')->__('Total incl. tax'); ?>:<br /> <?php echo $this->helper('checkout')->formatPrice($_incl+$_item->getWeeeTaxAppliedAmount()); ?></span>
            <?php endif; ?>
        <?php endif; ?>
    <?php endif; ?>

    <?php endif; //Can apply MSRP ?>

        <?php if ($_options = $this->getOptionList()):?>
        <div class="truncated">
          <div class="truncated_full_value">
            <dl class="item-options">
                <?php foreach ($_options as $_option) : ?>
                <dt><?php echo $this->htmlEscape($_option['label']) ?></dt>
                <dd>
                    <?php if (is_array($_option['value'])): ?>
                    <?php echo nl2br(implode("\n", $_option['value'])) ?>
                    <?php else: ?>
                    <?php echo $_option['value'] ?>
                    <?php endif; ?>
                </dd>
                <?php endforeach; ?>
            </dl>
          </div>

        </div>
        <?php endif; ?>
        <a href="<?php 
            $params = $this->getRequest()->getParams();
            if($params['isAjax'] == 1){
                $refererUrl = Mage::registry('referrer_url');
                if (empty($refererUrl)) {
                    $refererUrl = Mage::getBaseUrl();
                }
                $deleteUrl = $this->getUrl(
                    'checkout/cart/delete',
                    array(
                        'id'=>$_item->getId(),
                        Mage_Core_Controller_Front_Action::PARAM_NAME_URL_ENCODED => $this->helper('core/url')->getEncodedUrl($refererUrl)
                    )
                );
            }else{
                $deleteUrl = $this->getDeleteUrl();
            }
            echo $deleteUrl; 
        ?>" title="<?php echo $this->__('Remove This Item') ?>" onclick="return confirm('<?php echo $this->__('Are you sure you would like to remove this item from the shopping cart?') ?>');" class="btn-remove"><?php echo $this->__('Remove This Item') ?></a>
        <?php if ($isVisibleProduct): ?>
        <a href="<?php echo $this->getConfigureUrl() ?>" title="<?php echo $this->__('Edit item') ?>" class="btn-edit"><?php echo $this->__('Edit item')?></a>
        <?php endif ?>

    </div>
</li>

O bloco Mage_Checkout_Block_Cart_Item_Rendererpossui uma função overrideProductThumbnailque atualiza qual miniatura a ser usada ao renderizar um produto no carrinho.

Durante o _toHtmlrepresentante do produto agrupado, Mage_Checkout_Block_Cart_Item_Renderer_Groupedisso é chamado.

protected function _toHtml()
{
    $renderer = $this->getRenderedBlock()->getItemRenderer($this->getItem()->getRealProductType());
    $renderer->setItem($this->getItem());
    $renderer->overrideProductThumbnail($this->getProductThumbnail());
    $rendererHtml = $renderer->toHtml();
    $renderer->overrideProductThumbnail(null);
    return $rendererHtml;
}

Parece-me que você não adicionou os representantes de itens corretos para esses tipos de produtos. Veja o arquivo xml de layout app/design/frontend/base/default/layout/checkout.xmlpara saber como isso pode ser alcançado.

<block type="checkout/cart_sidebar" name="cart_sidebar" template="checkout/cart/sidebar.phtml" before="-">
    <action method="addItemRender"><type>simple</type><block>checkout/cart_item_renderer</block><template>checkout/cart/sidebar/default.phtml</template></action>
    <action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/cart/sidebar/default.phtml</template></action>
    <action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/cart/sidebar/default.phtml</template></action>
    <block type="core/text_list" name="cart_sidebar.extra_actions" as="extra_actions" translate="label" module="checkout">
        <label>Shopping Cart Sidebar Extra Actions</label>
    </block>
</block>

Para mim, a questão estava em

Mage_Catalog_Model_Product_Type_Configurable::getProductByAttributes

Eu precisava substituir o método e adicionar 'thumbnail' ao select. Ou seja,

$productCollection = $this->getUsedProductCollection($product)->addAttributeToSelect('name')->addAttributeToSelect('thumbnail');

EE 1.14.x

Usar:

if($product->getTypeId() == 'configurable'){
    $child = $product->getTypeInstance(true)->getProductByAttributes($params['super_attribute'], $product);
    $product = $child;
}

Isso define o produto para a criança.

Então use:

Mage::helper('catalog/image')->init($product, 'thumbnail');

para obter a miniatura do seu minicart ^ _ ^