Question about mapped tasks and custom state handlers for them - I've got a state handler for when a mapped task fails, however because the object passed to the state handler is a Task and not a TaskRun, the task.name is the generic task name, and not the mapped task name. Similarly in the state handler I don't have the task_run_id either. Is there any way to get the task_run_name in the state handler for a mapped task? Forgot to mention - if I try

object.task_run_name

it prints the format string used to generate the mapped task name, not the actual task name. I'm using the pattern here where my

task_run_name = "{table_name}"

- and I get

{table_name}

output in the state handler, because that's what it's set as at the Task level, rather than it being computed at the TaskRun level

Hey @David Elliott, you can use the

map_index

and the

task_full_name

which includes the

map_index

. Would that work for you? You can also use the task result to see the error message. Is the purpose for debugging?

I can't see those two options in there - I logged the

dir(object)

passed in the state handler and it gave me basically all the elements of a Task (here) which doesn't include map_index or task_full_name, and on trying to access those keys I get a 'no attribute' error. I think it's probably not possible, would be a nice addition though (to pass in the TaskRun rather than (or in addition to) the Task) it's for outputting to slack but with the specific name of the mapped task

It’s not in the task, it will be in the context so

prefect.context.get("map_index")

inside the state handler.

Ahh let me try that 🙏

Thank you! This is better than just having the map_id in my opinion. If you have this, you should be good.