Hi - I am trying to check if a task has successfully run in a flow and then based on that on a successful; or failed

task

completed do something. Something like

TaskRunner

state.is_successful()

but in a

flow

.

Hi Itay, are you saying you want to take a different action based on whether the upstream task succeeded or failed? I think we would suggest you create two downstream tasks, one with an

all_success

trigger and one with a

all_failed

trigger

Yes. But specifically how do you retrieve the

task

state

inside a

flow

? Is there something like

some_task,state.is_success

?

Hi itay - could you explain why you need this pattern?

I run some task with`subprocesses` if task is success do something. If false do something else

gotcha, yea that sounds like a perfect use case for either a trigger or an

ifelse

branch

yeah so i was planning to use ifelse. So specifically what is the syntax to capture the task state. The documentation had examples for post-flow analysis

task states are the currency of Prefect itself, and in general are only exposed to users in the following scenarios: - triggers - state handlers - post-flow analysis, as you mention It seems from your description that you don’t need to capture this state yourself; for example, you could subclass the Prefect ShellTask and instead of failing when the command fails, simply return

False

--> then the

ifelse

operator will branch based on command success / failure

ok thamks