Magento – Magento 2 clear particular block cache

block-cachecachemagento2

I have a block that displays a product grid with SKUs mention in admin system configuration and I have provided cache lifetime for that block as 3600 sec. It works perfectly fine.

Now when admin makes the changes in SKUs list in admin configuration it does not reflect the updated version immediately. How can I clear that particular block cache after admin saves the SKUs list?

Best Answer

Finally, I got a solution:

In your custom block, provide a cache tag for your block by assigning cache_tags a unique value for your block.

e.g. in my case, I will set the tag as cache_tags[] = 'custom_skus'

Or you can implement IdentityInterface in your custom block and then override getIdentities method, which will return array of tags.

e.g.

public function getIdentities()
{
    return ['custom_skus_block'];
}

Now, you can observe the save after of admin config and clean the tags using $this->_cacheManager->clean($tags);. Refer here for event of admin config save.

Hope this helps!

Related Solutions

Magento – Magento 1.9 Cache Custom Block Data

Below I have explain how to cache your result in simple way.

<?php
class Pcarousel_Pcarousel_Helper_Data extends Mage_Core_Helper_Abstract
{
    const CACHE_KEY = 'Pcarousel_AllCategories_';
    const CACHE_LIFE_TIME = 86400;
    const CACHE_GROUP = 'Pcarousel_AllCategories_list';

    public function getAllCategoriesArray($optionList = false)
    {
        $cacheKey = $this->_getCacheKey('AllCategoriesArray');
        $responseRresult = Mage::app()->loadCache($cacheKey);

        if (empty($responseRresult)) {
            $categoriesArray = Mage::getModel('catalog/category')
                ->getCollection()
                ->addAttributeToSelect('name')
                ->addAttributeToSelect('entity_id')
                ->addAttributeToSort('path', 'asc')
                ->addFieldToFilter('is_active', array('eq'=>'1'))
                ->load()
                ->toArray();

            if (!$optionList) {
                return $categoriesArray;
            }

            foreach ($categoriesArray as $categoryId => $category) { 
                if (isset($category['name'])) {
                    $categories[] = array(
                        'value' => $category['entity_id'],
                        'label' => Mage::helper('pcarousel')->__($category['name'])
                    );
                }
            }
            $this->_saveCache($cacheKey,$categories);
            return $categories;
        }   

        return unserialize($responseRresult);
    }

    /**
     * create key 
     * @return string
     */
    public function _getCacheKey($keyValue)
    {
        $websiteId = Mage::app()->getWebsite()->getId();
        $cacheKey = self::CACHE_KEY .$websiteId.'_'.$keyValue;
        unset($keyValue);
        return $cacheKey;
    }

    /**
     * save cache
     * @param mixed $value
     * 
     */
    public function _saveCache($cacheKey,$value)
    {
        Mage::app()->saveCache(serialize($value),
        $cacheKey, 
        array(self::CACHE_GROUP),
        self::CACHE_LIFE_TIME);
    }   

}

If you wand to clean cache using crone then put below code in crone file

Mage::app()->cleanCache('self::CACHE_GROUP');

Magento – How to disable cache for particular block in magento2

Set your block in controller file :

$resultPage->getLayout()->getBlock('customer_account_navigation');

After add this line in your controller :

$resultPage->setHeader('Cache-Control', 'no-store, no-cache, must-revalidate, max-age=0', true);

Clear cache and check your output.

Best Answer

Related Solutions

Magento – Magento 1.9 Cache Custom Block Data

Magento – How to disable cache for particular block in magento2

Related Topic