magento详细产品页调用上级目录产品

第一步：创建一个rand_product.phtml

1.phtml（app\design\frontend\base\default\template\catalog\product\rand_product.phtml）
如下代码

<?php if (($_products = $this->getProductCollection()) && $_products->getSize()): ?>
<h2><?php echo $this->__('Related Products') ?></h2>
<?php $_columnCount = 4; ?>
    <?php $i=0; foreach ($_products->getItems() as $_product): ?>
        <?php if ($i++%$_columnCount==0): ?>
        <ul>
        <?php endif ?>
            <li>
                <a href="<?php echo $_product->getProductUrl() ?>" title="<?php echo $this->htmlEscape($_product->getName()) ?>">
  <img src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(100,159) ?>" width="100" height="159" alt="<?php echo $this->htmlEscape($_product->getName()) ?>" /></a>
                <?php echo $this->getPriceHtml($_product, true, '-new') ?>
            </li>
        <?php if ($i%$_columnCount==0 || $i==count($_products)): ?>
        </ul>
        <?php endif ?>
    <?php endforeach; ?>
<?php endif; ?>

第二步：在catalog.xml里面加入下面这个块
2.xml

<block type="catalog/product_rand1" name="left.rand.product.viewed" template="catalog/product/rand_product.phtml" />

3.phtml调用：在view.phtml页面调用

<?php echo $this->getChildHtml('left.rand.product.viewed') ?>

创建一个文件Rand1.php,在下面的目录
4. php(app\code\core\Mage\Catalog\Block\Product\Rand1.php)

<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Catalog
 * @copyright   Copyright (c) 2009 Irubin Consulting Inc. DBA Varien (http://www.varien.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * New products block
 *
 * @category   Mage
 * @package    Mage_Catalog
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Catalog_Block_Product_Rand1 extends Mage_Catalog_Block_Product_Abstract
{
    protected $_productsCount = null;

    const DEFAULT_PRODUCTS_COUNT = 3;

    /**
     * Initialize block's cache
     */
    protected function _construct()
    {
        parent::_construct();
        $this->addData(array(
            'cache_lifetime'    => 86400,
            'cache_tags'        => array(Mage_Catalog_Model_Product::CACHE_TAG),
        ));
    }

    /**
     * Retrieve Key for caching block content
     *
     * @return string
     */
    public function getCacheKey()
    {
        return 'CATALOG_PRODUCT_NEW_' . Mage::app()->getStore()->getId()
            . '_' . Mage::getDesign()->getPackageName()
            . '_' . Mage::getDesign()->getTheme('template')
            . '_' . Mage::getSingleton('customer/session')->getCustomerGroupId()
            . '_' . md5($this->getTemplate())
            . '_' . $this->getProductsCount();
    }

    /**
     * Prepare collection with new products and applied page limits.
     *
     * return Mage_Catalog_Block_Product_New
     */
    protected function _beforeToHtml()
    {  
    $layer = Mage::getSingleton('catalog/layer');
    $_category = $layer->getCurrentCategory();
    $currentCategoryId= $_category->getId();
        $todayDate  = Mage::app()->getLocale()->date()->toString(Varien_Date::DATETIME_INTERNAL_FORMAT);
    $category   = Mage::getModel('catalog/category')->load($currentCategoryId);
        $collection = Mage::getResourceModel('catalog/product_collection');
        $collection->setVisibility(Mage::getSingleton('catalog/product_visibility')->getVisibleInCatalogIds());
    $collection->getSelect()->order('rand()');
        $collection = $this->_addProductAttributesAndPrices($collection)
            ->addStoreFilter()
            /*->addAttributeToFilter('news_from_date', array('date' => true, 'to' => $todayDate))
              ->addAttributeToFilter('news_to_date', array('or'=> array(
                0 => array('date' => true, 'from' => $todayDate),
                1 => array('is' => new Zend_Db_Expr('null')))
            ), 'left')
              ->addAttributeToSort('news_from_date', 'desc')*/
      ->addCategoryFilter($category)
            ->setPageSize($this->getProductsCount())
            ->setCurPage(1)
        ;

        $this->setProductCollection($collection);

        return parent::_beforeToHtml();
    }

    /**
     * Set how much product should be displayed at once.
     *
     * @param $count
     * @return Mage_Catalog_Block_Product_New
     */
    public function setProductsCount($count)
    {
        $this->_productsCount = $count;
        return $this;
    }

    /**
     * Get how much products should be displayed at once.
     *
     * @return int
     */
    public function getProductsCount()
    {
        if (null === $this->_productsCount) {
            $this->_productsCount = self::DEFAULT_PRODUCTS_COUNT;
        }
        return $this->_productsCount;
    }
}