Hi Everyone, we have a MLOps use-case where different jobs needs to be scheduled with different hardware resources so we have opted for flow of flow option as parent represent a single experiment we want to store/register artifacts using the parent id, is there any way to get parent flow id if you use create_flow_run

Hi @Hammad Ahmed, I don’t think this is available immediately because the

create_flow_run

just creates a flow with schedule = now. I think in order to do this, you would need to pass it in as a parameter to the child flow. This experience will be improved in Orion though

Thanks Kevin

Not sure if I understood correctly, but if you schedule some child flows using create_flow_run, then the parent flow ID can be accessed using:

prefect.context.flow_id

If you meant flow run id, then:

prefect.context.flow_run_id

and the child flow run ID is the result of the create_flow_run task

I think he wants the parent flow id to save the artifacts file names in the sub flow run.

oh, in that case perhaps passing it to the child flow using Parameter?

import prefect
from prefect import Flow, task
from prefect.tasks.prefect import create_flow_run, wait_for_flow_run

@task
def get_parent_flow_run_id():
    return prefect.context.flow_run_id

with Flow("parametrized_child_flow_run_from_parent_flow") as flow:
    parent_flow_run_id = get_parent_flow_run_id()
    child_flow_run_id = create_flow_run(
        flow_name="parametrized_flow", project_name="community", parameters=dict(parent_flow_run_id=parent_flow_run_id)
    )
    wait_for_flow_run(child_flow_run_id, stream_logs=True, raise_final_state=True)