hello, is it possible to run dependent flows (flow of flows) like shown here https://docs.prefect.io/core/idioms/flow-to-flow.html without registering to the BE server. For example create the flow runs and call

from prefect import Flow
from prefect.schedules import CronSchedule
from prefect.tasks.prefect import create_flow_run, wait_for_flow_run


weekday_schedule = CronSchedule(
    "30 9 * * 1-5", start_date=pendulum.now(tz="US/Eastern")
)


with Flow("parent-flow", schedule=weekday_schedule) as flow:
    
    # assumes you have registered the following flows in a project named "examples"
    flow_a = create_flow_run(flow_name="A", project_name="examples")
    wait_for_flow_a = wait_for_flow_run(flow_a, raise_final_state=True)
    
    flow_b = create_flow_run(flow_name="B", project_name="examples")
    wait_for_flow_b = wait_for_flow_run(flow_b, raise_final_state=True)
    
    flow_c = create_flow_run(flow_name="C", project_name="examples")
    wait_for_flow_c = wait_for_flow_run(flow_c, raise_final_state=True)
    
    flow_d = create_flow_run(flow_name="D", project_name="examples")
    wait_for_flow_d = wait_for_flow_run(flow_d, raise_final_state=True)
    
    b = wait_for_flow_b(upstream_tasks=[wait_for_flow_a])
    c = wait_for_flow_c(upstream_tasks=[wait_for_flow_a])
    d = wait_for_flow_d(upstream_tasks=[b, c])
flow.run()

You can run inner flows with

flow.run()

but then they won’t be tracked

when you say they won't be tracked you mean it wouldn't be flow of flows?

It won’t appear in the UI because it’s not a registered run

thats ok by me, but when i try to run the code above i get an error that is dont have flow_run_id

Michael is suggesting to call the

flow.run()

directly instead of using the

create_flow_run

task cuz that code calls the backend API

in case i use

flow.run()

it seems like

wait_for_flow_run

is not really working

wait_for_flow_run

takes in a flow id so it needs a backend. If you use the ShellTask though combined with

flow.run()

, I think it might wait for it

when you say to use ShellTask you mean to call my python script through a shell task and then call the shell task script from command line

Yeah exactly

that will execute the tasks. But if I need a flow of flows where b and c are run in parallel it wouldn't be possible.

Did you try with the ShellTask and LocalDaskExecutor?

yes ill dm you the script