Customer ID is null in Observer when customer_save_after triggers

Question

I have this event that fires just fine:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="customer_save_after">
        <observer name="remago_addcustomertotree" instance="Remago\Customertree\Observer\Addcustomertotree" />
    </event>
</config>

What I am trying to do is get the customer ID so that it can be added in a different table, when I create it in backend.

This is how I do it:

$customer = $observer->getEvent()->getCustomer();

Now, I am able to get all of his/her data by using

$customer->getName() 

or

$customer->getAddress()

and everything looks ok.

The problem is I can't seem to get anything other than null when I use:

$customer->getId()

or

$customer->getEntityId()

or

$customer->getData('entity_id')

Initially, I thought the problem was that I was using the event

customer_save_before

But changing it to

customer_save_after

had no effects whatsoever.

Any idea?

Answer 1

Try using the customer_save_after_data_object event instead.

In Magento 2.2, it is dispatched here: htdocs/vendor/magento/module-customer/Model/ResourceModel/CustomerRepository.php:239

public function save(
    \Magento\Customer\Api\Data\CustomerInterface $customer, 
    $passwordHash = null
)
{
    // Other customer save logic has been removed for brevity

    $savedCustomer = $this->get($customer->getEmail(), $customer->getWebsiteId());
    $this->eventManager->dispatch(
        'customer_save_after_data_object',
        ['customer_data_object' => $savedCustomer, 'orig_customer_data_object' => $customer]
    );
    return $savedCustomer;
}

See htdocs/vendor/magento/module-quote/etc/adminhtml/events.xml:13 for an implementation example:

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="customer_save_after_data_object">
        <observer name="customer" instance="Magento\Quote\Observer\Backend\CustomerQuoteObserver" />
    </event>
</config>