2022-02-22-dispatch-beforedeleteevent-before-delete-entities.md

title	issue
Dispatch BeforeDeleteEvent before delete entities	NEXT-11600

Core

• Added new event Shopware\Core\Framework\DataAbstractionLayer\Event\BeforeDeleteEvent to be dispatched before executing deleting entities commands
• Changed method Shopware\Core\Framework\DataAbstractionLayer\Dbal\EntityWriteGateway::executeCommands to dispatch BeforeDeleteEvent and execute its hooks after successfully/unsuccessfully ran
• Added new subscriber Shopware\Core\Checkout\Customer\Subscriber\CustomerBeforeDeleteSubscriber to dispatch CustomerDeletedEvent when customers are deleted
• Changed \Shopware\Core\Checkout\Customer\SalesChannel\DeleteCustomerRoute to not dispatch CustomerDeletedEvent because CustomerBeforeDeleteSubscriber did the job centrally

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Upgrade Information

Introduce BeforeDeleteEvent

The event is dispatched before delete commands are executed, so you can add success callbacks into the event when the delete command is successfully executed. Or you add error callbacks to the event when the execution meets some errors.

Reference: Shopware\Core\Framework\DataAbstractionLayer\Event\BeforeDeleteEvent

Examples:

class YourBeforeDeleteEvent implements EventSubscriberInterface
    public static function getSubscribedEvents()
    {
        return [
            BeforeDeleteEvent::class => 'beforeDelete',
        ];
    }

    public function beforeDelete(BeforeDeleteEvent $event): void
    {
        $context = $event->getContext();
        
        // Delete ids of the given entity
        // At the given point, the ids are not deleted yet
        $ids = $event->getIds(CustomerDefinition::ENTITY_NAME);

        $event->addSuccess(function (): void {
            // Implement the hook when the entities got deleted successfully
            // At the given point, the $ids are deleted
        });

        $event->addError(function (): void {
            // At the given point, the $ids are not deleted due to failure
            // Implement the hook when the entities got deleted unsuccessfully
        });
    }
}

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