Magento get products next by price - magento

Question

I need to get a collection of products next by price for specific product in some category.
For example: I have product White Shoes, it is located in Shoes category. I need to get next five products, that has higher price than White Shoes in Shoes category, and five products that has lower price.
Thanks for your help!

Answer 1

This can probably be cleaned up from an efficiency standpoint, but hopefully you get the gist of it. There are two variables you'll need to set, $product which is probably your White Shoes product as a Mage_Catalog_Model_Product object and $category which is your Shoes category as a Mage_Catalog_Model_Category object.
UPDATE
This is a better way to do it without loading the entire product collection for $category.
// Load up to 5 products with price <= $product
$fiveLower = Mage::getModel('catalog/product')->getCollection()
// Add whatever attributes you want here
->addAttributeToSelect(array(
'name',
'product_url',
'small_image',
))
// $category is an instance of Mage_Catalog_Model_Category
->addCategoryFilter($category)
// Both of these are required to get the price
->addMinimalPrice()
->addFinalPrice()
// Filter out the current product by id
->addAttributeToFilter('entity_id', array('neq' => $product->getId()));
// Filter by final_price <= $product and limit to 5.
$fiveLower->getSelect()
->having('final_price <= ?', $product->getFinalPrice())
->order('final_price')
->limit(5, 0);
// Load up to 5 products with price > $product
$fiveHigher = Mage::getModel('catalog/product')->getCollection()
->addAttributeToSelect(array(
'name',
'product_url',
'small_image',
))
->addCategoryFilter($category)
->addMinimalPrice()
->addFinalPrice();
$fiveHigher->getSelect()
->having('final_price > ?', $product->getFinalPrice())
->order('final_price')
->limit(5, 0);
echo 'These are the lower priced items:' . PHP_EOL;
foreach ($fiveLower as $item) {
echo $item->getName() . ' - ' . $item->getFinalPrice() . PHP_EOL;
}
echo 'These are the higher priced items:' . PHP_EOL;
foreach ($fiveHigher as $item) {
echo $item->getName() . ' - ' . $item->getFinalPrice() . PHP_EOL;
}

Answer 2

I had similar task, and here what I've done:
$customerGroupId = Mage::helper('customer')->getCustomer()->getGroupId();
$websiteId = Mage::app()->getStore()->getWebsiteId();
$finalPrice = $product->getFinalPrice();
$coreResource = Mage::getSingleton('core/resource');
$adapter = $coreResource->getConnection('catalog_read');
$prevSelect = $adapter->select()
->from(array('i' => $coreResource->getTableName('catalog/product_index_price')), array())
->join(
array('p' => $coreResource->getTableName('catalog/category_product')),
'p.product_id = i.entity_id',
array('product_id')
)
->where('p.category_id = ?', $categoryId)
->where('i.customer_group_id = ?', $customerGroupId)
->where('i.website_id = ?', $websiteId)
->where('p.product_id != ?', $product->getId())
->where('i.final_price < ?', $finalPrice)
->order('i.final_price DESC')
->limit(self::PRODUCTS_BLOCK_SIZE);
$lowerIds = array_reverse($adapter->fetchCol($prevSelect));
$nextSelect = $adapter->select()
->from(array('i' => $coreResource->getTableName('catalog/product_index_price')), array())
->join(
array('p' => $coreResource->getTableName('catalog/category_product')),
'p.product_id = i.entity_id',
array('product_id')
)
->where('p.category_id = ?', $categoryId)
->where('i.customer_group_id = ?', $customerGroupId)
->where('i.website_id = ?', $websiteId)
->where('p.product_id != ?', $product->getId())
->where('i.final_price > ?', $finalPrice)
->order('i.final_price ASC')
->limit(self::PRODUCTS_BLOCK_SIZE);
$higherIds = $adapter->fetchCol($nextSelect);
$lowerSliced = array_slice($lowerIds, -self::PRODUCTS_BLOCK_SIZE);
$requiredFromHigher = self::PRODUCTS_BLOCK_SIZE - count($lowerSliced);
$similarIds = array_merge(
$lowerSliced,
array_slice($higherIds, 0, $requiredFromHigher)
);
$collection = Mage::getResourceModel('catalog/product_collection')
->addAttributeToSelect('name')
->addAttributeToSelect('small_image')
->addAttributeToSelect('product_url')
->addAttributeToFilter('entity_id', array('in' => $similarIds))
->setPage(1, self::PRODUCTS_BLOCK_SIZE);