Hi One of my flows uses GQL to pull logs from another flow T

Question

Hi One of my flows uses GQL to pull logs from another flow The log pulling flow is directly triggered by the flow that produces the log to be pulled I continue to get this error for the log pulling flow ``` errors path flow run message Operation timed out extensions code API ERROR data None ``` When re running a flow at a later time it runs successfully Are there any docs that can provide info on API limits

Anna Geller · Answer

Before we dive into any technicalities related to GraphQL I just want to make sure you know that there is a direct way of pulling child flow run logs from a parent flow after you triggered it using ```wait for flow run stream logs=True ```

Anna Geller · Answer

here is a full example ```from prefect import Flow from prefect tasks prefect import create flow run wait for flow run with Flow parent flow as flow child flow run id = create flow run flow name= child flow name run name= custom run name child flowrunview = wait for flow run child flow run id raise final state=True stream logs=True ```

Anna Geller · Answer

the way it works is that it uses `FlowRunView` that has a method called `get logs` ```from prefect backend flow run import FlowRunView fr view = FlowRunView flow run id= uuid fr view get logs ```

Ken Nguyen · Answer

Ah I actually did not know that I have a couple questions on this 1 What form would the logs be in if I pull it with the method you mentioned above My current flow depends on the flow being a JSON which I then convert to a dataframe 2 When I use flow name to trigger a flow is that the same thing as using version group id In other words does it run the latest version of the flow with that name

Anna Geller · Answer

the easiest way is to try it out slightly smiling face the format is ```FlowRunLog timestamp=DateTime 2022 3 15 10 3 15 776868 tzinfo=Timezone +00 00 level=20 message= Submitted for execution Container ID 52383f95621d6d2341a4f53cc95de5be63e6031218e6366074cc74adbdcc1859 ``` I gave you a wrong syntax here is the right one if you want to try it ```from prefect backend flow run import FlowRunView flow run = FlowRunView from flow run id 9549c55f 1afe 45b6 afb3 1b1ed32e7c3f logs = flow run get logs ```

Anna Geller · Answer

if you convert it to a dataframe then this structured format could be perhaps even easier because you have native Python objects from it e g ```x = logs 0 x timestamp gives you a nice DateTime object x message x level```

Anna Geller · Answer

how do you trigger your flow normally when you do that using create flow run it returns flow run ID that you can use here directly

Ken Nguyen · Answer

I initially have a `produce logs` parent flow set on a regular schedule which runs first then triggers the `pull logs` child flow I think I should change my perspective and have the `pull logs` as a parent flow which has a wait for flow run to wait for the `produce logs` child flow to run first