How to fix the «Error filtering template: Unable to unserialize value» Magento 2.2 failure of a CMS widget rendering?

dmitry_fedyuk · May 23, 2017, 5:02pm

Error filtering template: Unable to unserialize value.

dmitry_fedyuk · May 23, 2017, 5:08pm

Magento\Framework\Serialize\Serializer\Json::unserialize()

magento/magento2/blob/07f4e702/lib/internal/Magento/Framework/Serialize/Serializer/Json.php#L32-L39


      
          public function unserialize($string)
          {
              $result = json_decode($string, true);
              if (json_last_error() !== JSON_ERROR_NONE) {
                  throw new \InvalidArgumentException('Unable to unserialize value.');
              }
              return $result;
          }

My $string is:

[“1”:[“type”:“Magento\CatalogWidget\Model\Rule\Condition\Combine”,“aggregator”:“all”,“value”:“1”,“new_child”:“”],“1–1”:[“type”:“Magento\CatalogWidget\Model\Rule\Condition\Product”,“attribute”:“category_ids”,“operator”:“==”,“value”:“6”]]

The string is from the content column of the cms_block table:

<...>
<div class="content-heading">
   <h2 class="title">Hot Sellers</h2>
   <p class="info">Here is what`s trending on Luma right now</p>
</div>
{{widget type="Magento\CatalogWidget\Block\Product\ProductsList" products_per_page="8" products_count="8" template="product/widget/content/grid.phtml" conditions_encoded="[`1`:[`type`:`Magento||CatalogWidget||Model||Rule||Condition||Combine`,`aggregator`:`all`,`value`:`1`,`new_child`:``],`1--1`:[`type`:`Magento||CatalogWidget||Model||Rule||Condition||Product`,`attribute`:`sku`,`operator`:`()`,`value`:`WS12, WT09, MT07, MH07, 24-MB02, 24-WB04, 241-MB08, 240-LV05`]]"}}

dmitry_fedyuk · May 24, 2017, 1:54pm

I have fixed the problem by resaving the problem content pages / blocks in the backend: it forced Magento 2 to convert the problem widgets to the new format.

dmitry_fedyuk · September 30, 2018, 8:39pm

Another solution: How to fix the «Unable to unserialize value» failure while upgrading Magento from 2.1.x to 2.2.x?