#3359 [Core feature] Override/Extension support for dataclass type Issue created by elibixby Motivation: Why do you think this is important? Dramatically simplifies allowing user defined serialization/deserialization logic using a pattern that already is supported by

dataclass_json

Goal: What should the final outcome look like, ideally? Add support for custom encoders and decoders to

dataclass

types, as described here. https://lidatong.github.io/dataclasses-json/#extending Describe alternatives you've considered Currently the ugly workaround is decoding in

__post_init__

and encoding via a

@classmethod

Propose: Link/Inline OR Additional context Should be easy to add in https://github.com/flyteorg/flytekit/blob/245c4143b4ed20487d837850df4a140c7b230986/flytekit/core/type_engine.py Simply test for encoder and decoder when serializing/deserializing. Would be good to add support for

mm_field

as well, to allow for custom serializers/deserializers that use non-string representations. Are you sure this issue hasn't been raised already? ☑︎ Yes Have you read the Code of Conduct? ☑︎ Yes flyteorg/flyte