I have created a custom block to display 10 random products on my homepage, and for load time etc, it is a bad idea to request random products from the database each load. Thus, have incorporated the default magento caching mechanism into my code to cache x versions of the block and rotate them for each user. But, I cannot get it to work correctly.
Currently, it loads random products A, B and C on first page load. Then loads new different random products ( products X, Y & Z) on the next page load. The page load after that loads the random products from the first load (A,B & C).
I cannot see where I have gone wrong thus was wondering if anyone could kindly help myself see my mistake.
Code,
<?php
class Vish_RandomProduct_Block_Random extends Mage_Core_Block_Template{
protected function _construct()
{ $this->addData(array(
'cache_lifetime' => 86400,
'cache_tags'=> array(Mage_Core_Model_Store::CACHE_TAG, Mage_Cms_Model_Block::CACHE_TAG)
));
}
protected function _getRandomProductCollection()
{ $numberOfItems = 12;$productCollection = Mage::getModel('catalog/product')->getCollection()
->addStoreFilter()
->setVisibility(Mage::getSingleton('catalog/product_visibility')->getVisibleInCatalogIds())
->addAttributeToFilter('name', array('nlike' => '%Adjustable Book Protection Jackets%'));$candidateIds = $productCollection->getAllIds();$numberOfProducts = count($candidateIds);$chosenIds = [];
while ($numberOfItems) { $randomKey = mt_rand(0, $numberOfProducts - 1);
if (!isset($chosenIds[$randomKey])) { $chosenIds[$randomKey] = $candidateIds[$randomKey];
--$numberOfItems;
}
}$productCollection->addIdFilter($chosenIds);$productCollection
->addMinimalPrice()
->addFinalPrice()
->addTaxPercents()
->addAttributeToSelect(Mage::getSingleton('catalog/config')->getProductAttributes())
->addUrlRewrite();
return $productCollection;
}
public function getCacheKeyInfo()
{ $session = Mage::getSingleton('core/session'); $counter = $session->getData('random_counter'); $counter = ($counter + 1) % 10; $session->setData('random_counter', $counter);
return array( $this->getNameInLayout(), $counter
);
}
}
?>Update:-
investigating further, via the placement of a mage::log, to see the count variable in the getCacheKeyInfo() function it reveals 7 entries each time I refresh. Little confused why this function is running this many times.
2017-11-21T20:11:45+00:00 DEBUG (7): 1 2017-11-21T20:11:45+00:00 DEBUG (7): 2 2017-11-21T20:11:45+00:00 DEBUG (7): 3
Rest of the block code:
vishrandom.phtml
<?php
$collection = $this->_getRandomProductCollection();
// Mage::log("template for random called", null, 'randomprodcachelog.log');
?>
<?php if ($collection->getSize() > 0): ?>
<div class="jcarousel-wrapper">
<div class="jcarousel">
<ul>
<?php foreach ($collection as $_product) { ?>
<li><a href="<?php echo $_product->getProductUrl() ?>">
<img src='media/wysiwyg/805.svg' data-src="<?php echo $this->helper('catalog/image')->init($_product, 'small_image')->resize(200); ?>" alt="" /></a>
<div class="productName"> <a href="<?php echo $_product->getProductUrl(); ?>"><?php echo $_product->getName(); ?></a><br/>
</div>
<?php if($this->htmlEscape($_product->getExtraInfo() !="")):?> <span class="icon icon-info-circle tooltip" title="<?php echo $this->htmlEscape($_product->getExtraInfo())?>" ></span>
<?php endif;?>
<div class="productCode">
<?php echo $this->__('Product Code: ') . $this->htmlEscape($_product->getData('sku'));?>
</div>
<?php if($_product->isSaleable()): ?>
<p><button type="button" title="<?php echo $this->__('Add to Cart') ?>" class="button btn-cart" onclick="setLocation('<?php echo $this->helper('checkout/cart')->getAddUrl($_product) ?>')"><span><span><?php echo $this->__('Add to Basket') ?></span></span></button></p>
<?php else: ?>
<p class="availability out-of-stock"><span><?php echo $this->__('Out of stock') ?></span></p>
<?php endif; ?>
<ul class="add-to-links">
<?php if ($this->helper('wishlist')->isAllow()) : ?>
<li><a href="<?php echo $this->helper('wishlist')->getAddUrl($_product) ?>" class="link-wishlist"><?php echo $this->__('Add to Wishlist') ?></a></li>
<?php endif; ?>
</ul>
</li>
<?php }?>
</ul>
</div>
<a href="#" class="jcarousel-control-prev">‹</a>
<a href="#" class="jcarousel-control-next">›</a>
</div>
<?php endif;?>/local/vish/RandomProduct/etc/config.xml
<?xml version="1.0"?>
<config>
<modules>
<Vish_RandomProduct>
<version>0.0.1</version>
</Vish_RandomProduct>
</modules>
<global>
<blocks>
<Vish_RandomProduct>
<class>Vish_RandomProduct_Block</class>
</Vish_RandomProduct>
</blocks>
</global>
</config>
