Assert function failing for Mongo ODM EmbedMany tag

[eastern-ravindra]

https://github.com/doctrine/doctrine-laminas-hydrator/blame/81ee8121f42dcc0b6f39e08dce56b10baf6fb95f/src/DoctrineObject.php#L355

if ($metadata->hasAssociation($field)) {
                $target = $metadata->getAssociationTargetClass($field);
                assert($target !== null);

Above assert code is failing for mongoDB, when we are using EmbedMany argument without target document locally.

According to documentation, EmbedMany without target document is allowed to embed different documents in same field.(https://www.doctrine-project.org/projects/doctrine-mongodb-odm/en/2.7/reference/embedded-mapping.html#mixing-document-types)

Does this assert check is really needed as null value is also accepted for mongodb?

[TomHAnderson]

If you take out the assertion, does it work? There is this line too that expects the target:

doctrine-laminas-hydrator/src/DoctrineObject.php

Line 373 in 81ee812

$this->toMany($object, $field, $target, $value);

[eastern-ravindra]

If you take out the assertion, does it work? There is this line too that expects the target:

doctrine-laminas-hydrator/src/DoctrineObject.php

Line 373 in 81ee812

$this->toMany($object, $field, $target, $value);

toMany function is not working in this case, giving

Doctrine\Persistence\Mapping\MappingExceptionClass '' does not exist

I think, we need to override this function where we can add conditions if $target is null