Class Magento\Eav\Model\Attribute\Data\Datetime does not exist After Magento2 Migration

Question

When Creating a Customer registration I am getting this error

"We can't save the customer"

on front end. I have Migrated from Magento 1.9.1.1 to Magento 2.3.3.

This is error log:Exception message: Class Magento\Eav\Model\Attribute\Data\Datetime does not exist.

Answer 1

First, you need to check whether there are any backend_model columns which have value = Magento\Eav\Model\Attribute\Data\Datetime in the eav_attribute table.

If yes, edit them to value = Magento\Eav\Model\Entity\Attribute\Backend\Datetime

Next, do the same action, check whether there are any frontend_model columns which have value = Magento\Eav\Model\Attribute\Data\Datetime then change them to value = Magento\Eav\Model\Entity\Attribute\Backend\Datetime

And finally, check whether there are any attribute_model columns which have value = Magento\Eav\Model\Attribute\Data\Datetime then edit them to value = null

Answer 2

This seems to be a change in the migration mapping files I had overlooked. I had the same problem, added a class in /vendor/magento/module-eav/Model/Attribute/Data/Datetime.php.

One of those nice things you find out after moving things into production :-(

<?php
namespace Magento\Eav\Model\Attribute\Data;

use Magento\Framework\App\RequestInterface;

/**
 * EAV Entity Attribute Date Data Model
 *
 * @author      Magento Core Team <[email protected]>
 */
class Datetime extends Date
{
}

Answer 3

edit attribute 'mailchimp_sync_delta' frontend_input datetime to date worked for me.