#2267 [Housekeeping] [flytekit] Investigate better handling of incorrect dataclass/enum types Issue created by wild-endeavor Describe the issue Issue originally reported in https://flyte-org.slack.com/archives/C01P3B761A6/p1647360364170899

from dataclasses import dataclass
from dataclasses_json import dataclass_json
from enum import Enum

from flytekit import task, workflow

# ERROR: having these two annotations causes
# TypeError: __call__() missing 1 required positional argument: 'value'
@dataclass_json
@dataclass
class Aggregation(Enum):
    GROUP_1x1 = "1x1"
    GROUP_5x1 = "5x1"


@dataclass_json
@dataclass
class Nested:
    agg: Aggregation


@task
def tsk(nested: Nested):
    if nested.agg == Aggregation.GROUP_1x1:
        print("1x1")
    elif nested.agg == Aggregation.GROUP_5x1:
        print("5x1")
    else:
        raise ValueError("bad aggregation value")


@workflow
def wf():
    a = tsk(nested=Nested(agg=Aggregation.GROUP_1x1))


if __name__ == "__main__":
    wf()

The combination of dataclass and Enum (which shouldn't be done) causes errors that are hard to understand. Investigate whether flytekit can report this error any better. Are you sure this issue hasn't been raised already? ☑︎ Yes Have you read the Code of Conduct? ☑︎ Yes flyteorg/flyte