Schema Generator: serializer field from models.DurationField with MinValueValidator produces invalid output

[peterthomassen]

I have a model with the following field:

max_age = models.DurationField(null=True, default=None, validators=[MinValueValidator(timedelta(0))])

The schema contains the following output:

        max_age:
          type: string
          nullable: true
          minimum: !!python/object/apply:datetime.timedelta
          - 0
          - 0
          - 0

This cannot be rendered by Swagger / ReDoc, leading to failures when loading the schema.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[sbrandtb]

The problem still occurs in 3.13.1. I would guess this is related to #7641

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[peterthomassen]

I believe this is still current.

[tomchristie]

Any keen code archeologists up for digging into what's needed to resolve this?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[peterthomassen]

I believe this is still current.

[rnshaikh]

I have found that as yaml Dumper convert time delta into python tag which is not renderable. so here we can add a custom representer for datetime.timedelta which converts it into 'str' tag which is similar to JSON OpenAPI Schema fix. #7641.

Dumper.add_representer(datetime.timedelta, encoders.CustomScalar.represent_timedelta)

I have created PR for this #9007.