Validation customer attribute

[tuanvinhtla219]

Hello everyone, i'm a newbie in magento 2 and i got a issues related in my task, hope you guys give to me some advices.

I created an customer eav attribute with name tenant_name and want to add validation to check tenant already exist in database or not when user register a new account.

i have has reserching and apply some solution but seems its run not correct, here is my code

images

<?php
namespace Magenest\CustomerAttribute\Model\Customer\Attribute\Backend;

use Magento\Framework\Exception\LocalizedException;

class Tenant extends \Magento\Eav\Model\Entity\Attribute\Backend\AbstractBackend
{
    
    protected $_tenantFactory;

      /**
     * @param \Magento\Store\Model\StoreManagerInterface $storeManager
     */
    public function __construct(\Magenest\CustomerAttribute\Model\TenantFactory $tenantFactory)
    {
        $this->_tenantFactory = $tenantFactory;
    }



     /**
     * @param \Magento\Framework\DataObject $object
     * @return void
     */
    public function beforeSave($object)
    { 
      
        $value = $object->getData($this->getAttribute()->getAttributeCode());
        $tenant = $this->_tenantFactory->create();
        $resultColections =  $tenant->getCollection()->getData();

        foreach ($resultColections as $keyValues) {
            # code...
            if($keyValues['tenant_name'] === $value){
                throw new LocalizedException(
                    __(
                        'Please regis other tenant name'
                    )
                );
            }
        }

        
    }

    /**
     * @param \Magento\Framework\DataObject $object
     * @return void
     */
    public function afterSave($object)
    {
        $value = $object->getData($this->getAttribute()->getAttributeCode());
        $tenant = $this->_tenantFactory->create();
        $data = [
			'tenant_name'  => $value,
			'status'       => 1
		];
    
		$tenant->addData($data)->save();
    }
}

and here issues occurs, alway in case 'Please regis other tenant name'

imag

So do i miss understood or missing any case? please help

Thanks for reading.