特定のカテゴリ内のある製品から別の製品に移動するための前の次のボタンを作成したいと考えています。
私はview.phtmlでこのコードを使用していましたが、$search_parameterに対して未定義の変数エラーが発生しました。
<?php // Previous and Next product links in product page
$_product = $this->getProduct();
if(!$_product->getCategoryIds())
return; // Don't show Previous and Next if product is not in any category
$cat_ids = $_product->getCategoryIds(); // get all categories where the product is located
$cat = Mage::getModel('catalog/category')->load( $cat_ids[0] ); // load first category, you should enhance this, it works for me
$order = Mage::getStoreConfig('catalog/frontend/default_sort_by');
$direction = 'asc'; // asc or desc
$category_products = $cat->getProductCollection()->addAttributeToSort($order, $direction);
$category_products->addAttributeToFilter('status',1); // 1 or 2
$category_products->addAttributeToFilter('visibility',4); // 1.2.3.4
$cat_prod_ids = $category_products->getAllIds(); // get all products from the category
$_product_id = $_product->getId();
$_pos = array_search($_product_id, $cat_prod_ids); // get position of current product
$_next_pos = $_pos+1;
$_prev_pos = $_pos-1;
// get the next product url
if( isset($cat_prod_ids[$_next_pos]) ) {
$_next_prod = Mage::getModel('catalog/product')->load( $cat_prod_ids[$_next_pos] );
} else {
$_next_prod = Mage::getModel('catalog/product')->load( reset($cat_prod_ids) );
}
// get the previous product url
if( isset($cat_prod_ids[$_prev_pos]) ) {
$_prev_prod = Mage::getModel('catalog/product')->load( $cat_prod_ids[$_prev_pos] );
} else {
$_prev_prod = Mage::getModel('catalog/product')->load( end($cat_prod_ids) );
}
?>
<div class="clear"></div>
<!--PREVIOUS BUTTON NEXT BUTTON STARTS-->
<div class="previousNext">
<?php if($_prev_prod != NULL): ?>
<a href="<?php print $_prev_prod->getUrlPath(); if($search_parameter):?>?search=1<?php endif;?>"><span style="margin-right: 270px;"><?php echo $this->__('<< PREVIOUS') ?></span></a>
<?php endif; ?>
<?php if($_next_prod != NULL): ?>
<a href="<?php print $_next_prod->getUrlPath(); if($search_parameter):?>?search=1<?php endif;?>"><span style="margin-left: 270px;"><?php echo $this->__('NEXT >>') ?></span></a>
<?php endif; ?>
</div>
<!--PREVIOUS BUTTON NEXT BUTTON ENDS-->
<div class="clear"></div>