Hi! I’m facing an issue where I can’t quite get the Prefect Slack app connected to our Slack instance, but we do have our own hand-rolled Slack notifier that sends messages into a channel. I currently have a

SendSlackNotificationTask

task at the end of my (linear and static) flow, but it fails to run if any of its parents failed. This means the notification won’t run, so I won’t know things failed, which is probably bad. My question: is there a way to make a task run regardless of its parent tasks’ states? I know there’s the

case

option — is that a better fit here? Can

case

work with a task’s state?

Instead of a task, could you put it in a state handler?

Ah, yeah! So that would get passed to this

SendSlackNotificationTask(..., state_handlers=[slack_state_handler])

, and

slack_state_handler

specifically checks for the success and failed states? Referencing here: https://docs.prefect.io/core/concepts/notifications.html#state-handlers

Since you want to send the Slack notifications at the end of the flow, I would expect it to be a flow state handler instead.

I’ll give that a shot — thanks @Amanda Wee!

The state makes sense because normally people add some information to the Slack message, but about making a task run all the time, the answer would be in triggers and setting a trigger to

always_run

so that it runs even if upstream tasks fail.

Gotcha! I think going down the vein of state handlers, I was looking for the

terminal_state_handler

argument to

Flow

— thanks @Kevin Kho!