Is it possible to get the actual class name instead of the proxy class name from a lazy loaded object using Doctrine's MongoDB ODM?

Question

Prior to beginning upgrade work to update my application to Symfony 3, and with it upgrading several libraries (including Doctrine) to more recent versions, I was able to compare references in a query to the results of an earlier query. I was able to do this by matching the derived class name (e.g. get_class($source)) of each item in the results of the earlier query to the _doctrine_class_name field on a database reference in the new query. This would properly filter out documents that were of the incorrect type.

Since upgrading my dependencies, when I get the derived class name of the source, I am getting back a proxy instead of the actual class name, e.g. MongoDBODMProxies\\__CG__\\AcmeBundle\\Documents\\MyClass instead of AcmeBundle\Documents\MyClass.

The collection of objects I am trying to filter in this case are Activity objects, among their properties is a $source property which is an open type, that is to say that there is no explicit discriminator map for it as I wanted it to potentially be able to hold any document. What I am trying to get working again is a query that filters these activities by their matching sources, using ID and class name. The query code looks like this:

public function findAllBySource($sources = array(), $date = null, $limit = 50)
{
    $qb = $this->createQueryBuilder()->limit($limit)->sort('date', 'DESC');

    if (!empty($date)) {
        $qb->field('date')->lte($date);
    }

    $qb->addOr($qb->expr()->field('source')->exists(false));
    foreach ($sources as $source) {
        // $source is initialized as a proxy to the real class here
        // using get_class($source) returns the class name to the
        // proxy, not the actual FQCN, e.g. AcmeBundle\Document\MyClass
        $expr = $qb->expr()
            ->field('source.$id')->equals(new \MongoId($source->getId()))
            ->field('source._doctrine_class_name')->equals(get_class($source));
        $qb->addOr($expr);
    }
    $query = $qb->getQuery();
    return array_values($query->execute()->toArray());
}

For what it is worth, I am using the following versions of the Doctrine and MongoDB ODM/bundles:

doctrine/mongodb ^1.3.0
doctrine/mongodb-odm ^1.1.0
doctrine/mongodb-odm-bundle ^3.2.0

Just to clarify, are you looking to get "MyClass" instead of "MongoDBODMProxies\\__CG__\\...\\MyClass"? — anFfWuy7qbJWaPp6DSOR, Jul 20 '16 at 03:41
Sorry, I should be have been more clear, yes and no: I want the FQCN sans the proxy prefix, so basically the actual FQCN of the class, so if the class was located in `AcmeBundle\Documents\MyClass` and the proxy class showed `MongoDBODMProxies\\__CG__\\AcmeBundle\\Documents\\MyClass` I would want the `AcmeBundle\Documents\MyClass` class name. I'll update to add that clarity. — Sean Quinn, Jul 20 '16 at 03:59

anFfWuy7qbJWaPp6DSOR · Accepted Answer · 2016-07-20T12:44:27.327

2

Check out the getClass from ClassUtils class (part of Doctrine Common):

<?php

// $source is an instance of MongoDBODMProxies\\__CG__\\AcmeBundle\\Documents\\MyClass

$source = Doctrine\Common\Util\ClassUtils::getClass($source);

echo $source; // $source should now be "AcmeBundle\Documents\MyClass"

edited Jul 20 '16 at 12:44

answered Jul 20 '16 at 12:30

anFfWuy7qbJWaPp6DSOR

305
2
9

That is awesome. It's odd though, `getRealClass` seemed to supply additional data at the end of the class name that looked like a positional marker (`@XXXXX`) and didn't work, but when I used `getClass` from the class utils everything worked. It might have just been an odd side effect. Still thank you very much for pointing me to that utility, I wasn't aware of it previously! – Sean Quinn Jul 20 '16 at 12:42
After reading the code of ClassUtils a bit more closely, it appears using getClass is correct. $source is an instance, not a string - my mistake. Glad I could be of help. Thanks! – anFfWuy7qbJWaPp6DSOR Jul 20 '16 at 12:44

Is it possible to get the actual class name instead of the proxy class name from a lazy loaded object using Doctrine's MongoDB ODM?

1 Answers1