#4693 Flytekit cant raise exception for Pydantic v2 ValidationError Issue created by jganbat-fn Hello Flyte folks, so I am updating our flytekit and we recently migrated to pydantic v2 on our model validation. however I am getting the following. Test runs like below • There is a unit test with pytest.raises that should raise ValidationError • This unit test calls flyte task that includes the pydantic model validation • However the test does not return the underlying ValidationError rather return the following

TypeError: No constructor defined

. I can see the underlying ValidationError exception but also see

During handling of the above exception, another exception occurred:

This

TypeError

happens at

flytekit/exceptions/scopes.py:user_entry_point

at this line

breakpoint()
>                   raise type(exc)(f"Error encountered while executing '{fn_name}':\n  {exc}") from exc
E                   TypeError: No constructor defined

it looks like pydantic v2 we need to raise specific error like this. Does anyone have this issue [Slack Message](https://flyte-org.slack.com/archives/CP2HDHKE1/p1704743152082939?thread_ts=1704743152.082939&cid=CP2HDHKE1) ``` flyteorg/flyte