Hera does not have AW 3.6 types (pod_gc on WorkflowTemplate is not rendered correctly)

[seyhbold]

Pre-bug-report checklist

1. This bug can be reproduced using pure Argo YAML

• Yes 👉 Please report a bug to the Argo Workflows GitHub 👈
• No

If yes, it is more likely to be an Argo bug unrelated to Hera. Please double check before submitting an issue to Hera.

2. I have searched for existing issues

• Yes

3. This bug occurs in Hera when...

• exporting to YAML
• submitting to Argo
• running on Argo with the Hera runner
• other:

Bug report

Describe the bug
I am using WorkflowTemplate with pod_gc

from hera.workflows import WorkflowTemplate, models as m

with WorkflowTemplate(
    name=name,
    ...
    pod_gc=m.PodGC(
        delete_delay_duration=m.Duration(duration="5m"),
        strategy="OnWorkflowCompletion",
    ),

rendering the yaml of this gives:

  imagePullSecrets:
  - name: regcred
  podGC:
    deleteDelayDuration:
      duration: 5m
    strategy: OnWorkflowCompletion

According to https://argo-workflows.readthedocs.io/en/latest/fields/#podgc

it should render as:

  imagePullSecrets:
  - name: regcred
  podGC:
    deleteDelayDuration: "5m"
    strategy: OnWorkflowCompletion

deleteDelayDuration should be a string and not a Duration object

To Reproduce
Full Hera code to reproduce the bug:

from hera.workflows import WorkflowTemplate, models as m

with WorkflowTemplate(
    pod_gc=m.PodGC(
        delete_delay_duration=m.Duration(duration="5m"),
        strategy="OnWorkflowCompletion"
    )
) as template:
    pass

print(template.to_yaml())

Expected behavior
render

...
podGC:
  deleteDelayDuration: "5m"
  strategy: OnWorkflowCompletion
...

Environment

• Hera Version: 5.18.0
• Python Version: 3.13.1
• Argo Version: 3.6.2

Could you please give me a hint how to fix that?

[elliotgunton]

I think this is a change in the API models used by Argo 3.6. We have this on our radar (#1215) so I'll take a look to confirm 👀

[elliotgunton]

Confirmed this is a result of 3.6 types changing, new models would be written as

    pod_gc=m.PodGC(
        delete_delay_duration="5m",
        strategy="OnWorkflowCompletion",
    ),

[seyhbold]

Thank you. Do you have an idea how I cloud render the pod_gc now before the new hera release?

[elliotgunton]

m.PodGC.construct should work as long as you don't want any validation at all!

with WorkflowTemplate(
    pod_gc=m.PodGC.construct(
        delete_delay_duration="5m",
        strategy="OnWorkflowCompletion",
    )
) as w:
    pass

[seyhbold]

Ah, perfect. Thank you so much.