[Serializer] Support multiple levels of discriminator mapping #37628
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When using multiple levels of discriminator mapping for denormalizing to a multiple level class hierarchy, only the top level discriminator mapping is considered, resulting in an error: Cannot instantiate abstract class ...
Example:
This results in an error: Cannot instantiate abstract class ItemNode. Expected is that
$node
is of typeFooItemNode
after denormalization.The solution is to recursively call
AbstractObjectNormalizer::instantiateObject()
when a mapping is found, instead of always callingparent::instantiateObject()
.