How to check if a class is a Doctrine entity?

Question

Given a class name, say Domain\Model\User, is there a programmatic way to know whether this class is marked as a Doctrine entity?

I could check for the presence of the @Entity annotation, but I'm looking for a generic way that would work with any metadata driver (annotations, YAML, XML, etc.)

Answer 1

Courtesy Stof on the doctrine-dev mailing list:

return ! $em->getMetadataFactory()->isTransient($className);

I'll add that this method considers proxies (returned by the EntityManager as part of the lazy loading strategy) as transient; so if you're testing objects, don't blindly use get_class(), be sure to test first:

$object instanceof \Doctrine\Common\Persistence\Proxy

Working implementation:

use Doctrine\Common\Persistence\Proxy;
use Doctrine\ORM\EntityManager;

function isEntity(EntityManager $em, string|object $class): bool
{
    if (is_object($class)) {
        $class = ($class instanceof Proxy)
            ? get_parent_class($class)
            : get_class($class);
    }

    return ! $em->getMetadataFactory()->isTransient($class);
}