gistfile1.php

<?php 

// $em is d2 entity manager
// 
$class = array(
    'Blog\Model\Article',
    'User\Model\User'
);
$tool = new \Doctrine\ORM\Tools\SchemaTool($this->_em);
        
$metadata = array();
foreach ($classes AS $class) {
    $metadata[] = $this->_em->getClassMetadata($class);
}
$tool->createSchema($metadata);