Hello folks I feel like I m missing something pretty basic I

Question

Hello folks I feel like I m missing something pretty basic I have the following code that runs `CreateRidAlert` task twice and throws warnings ``` create alert = CreateAlert create rid alert = CreateRidAlert with Flow Alert Flow as flow alert json = Parameter name= alert json required=True alert = create alert alert json rid alert = create rid alert alert ifelse has rid alert rid alert None rid = extract rid rid alert ``` I d like to remove the `rid alert = create rid alert alert ` line but then I don t know how to wire up the `ifelse` line with a result to pass to `extract rid` for data flow This may not be a clear question

Christopher Stokes · Answer

I m trying to make a conditional fork in the DAG between alerts with rids and those without

Chris White · Answer

Hi < Christopher Stokes> The warnings should go away in the latest release of Prefect 0 6 5 however the double run definitely surprises me Any chance you could rewrite the structure of your Flow with some dummy print tasks so I can recreate on my machine

Christopher Stokes · Answer

Hmm This appears to be user error The warnings claim upstream tasks are run regardless and the viz alludes to that but print statements show otherwise

Christopher Stokes · Answer

``` task def create alert input param str gt str print f created alert with param input param return input param task def always true alert str print always true called in ifelse return True task def enrich alert alert str gt str print f enriching alert alert return f alert enriched task def post alert alert str gt None print f posting alert with Flow Example flow as flow input param = Parameter name= input param required=True alert = create alert input param enriched alert = enrich alert alert ifelse always true alert enriched alert None post alert enriched alert state = flow run parameters= input param test alert flow visualize flow state=state ```

Christopher Stokes · Answer

so I think I was just thrown by the warning ``` prefect tasks control flow conditional py 89 PrefectWarning One of the tasks passed to the switch condition has upstream dependencies lt Task enrich alert gt Those upstream tasks could run even if the switch condition fails which might cause unexpected results prefect utilities exceptions PrefectWarning ```

Christopher Stokes · Answer

apologies for wasting your time on a Friday

Jeremiah · Answer

Yeah that warning is from about a year ago when we thought Airflow style branching would be predominant even though Prefect supports the style of branching you re doing which is more like gating We removed it about a week ago slightly smiling face

Jeremiah · Answer

No worries at all we re glad to hear how you re approaching Prefect and it helps us adjust it to make it more easy to use

Chris White · Answer

Yea no worries Glad you were able to figure it out

Christopher Stokes · Answer

Bumped version from `0 6 4` to `0 6 5` No more warnings Appreciated