Hello everyone. Is there a way to customize the final message of the flow ? Currently it only says

====== final results: <Success: "All reference tasks succeeded.">
or 
====== final results: <Failed: "Some reference tasks failed.">

We have different types of successes/failures. Currently we could not differentiate them from the flow hook notification message. We would like to set customized messages to different scenarios and react differently. for example

====== final results: <Failed: "Task_A failed due to timeout.">

Hi -- off the top of my head you can use a flow-level state handler to do this e.g.

import prefect
from prefect.engine.state import Success
from prefect import Flow, task


def update_final_state(flow, old_state, new_state):
    if isinstance(new_state, Success):
        new_state.message = "Hello world!"
    print(f"At state: {new_state}")
    return new_state


@task
def do_nothing():
    pass


with Flow("example-flow-final-state", state_handlers=[update_final_state]) as flow:
    do_nothing()


flow.run()

but the final state of the flow may be a special case so I'm not sure it'll be reflected in the UI

Is there a way to send out flow state notification with some customized field or message based on the result of a task?

You can implement task state handlers that send a notification and attach them to specific tasks (or all tasks)

Yes, I also think about this work-around of attach notification to task state. However, we built all our monitoring and alert system based on Prefect Cloud Flow Run Hook notification, which is associated with flow state. It’s a big change to switch it all to task level notification.

👌

Thank youi