Overriding Attribute Value

Event

See Event Pre-Update-Attribute-Value

Event Subscriber

In certain cases, for example if instead of an internal identifier (e.g., 1) a readable label (e.g., red) should be used, it is possible to modify the value within an event. This is done through an event subscriber that intervenes before saving the attribute value and replaces the value if needed.

Example

<?php
 
namespace AppBundle\EventListener;
 
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Twocream\ProductAttributeBundle\Event\TwocreamProductAttributeEvents;
use Twocream\ProductAttributeBundle\Event\UpdateAttributeValueEvent;
 
class TwocreamProductAttributeListener implements EventSubscriberInterface
{
    public static function getSubscribedEvents()
    {
        return [
            TwocreamProductAttributeEvents::PRE_UPDATE_ATTRIBUTE_VALUE => 'preUpdateAttributeValue'
        ];
    }
 
    public function preUpdateAttributeValue(UpdateAttributeValueEvent $event): void
    {
        $attributeValueData = $event->getAttributeValueData();
 
        if (
            !empty($attributeValueData['data']['fieldName'])
            && $attributeValueData['data']['fieldName'] == 'SAP_COLOR'
        ) {
            $colors = [
                1 => 'red',
                45 => 'yellow',
                132 => 'green'
            ];
            $sapValue = $attributeValueData['data']['value'];
 
            $attributeValueData['data']['value'] = $colors[$sapValue] ?? $sapValue;
        }
 
        $event->setAttributeValueData($attributeValueData);
    }
}