omarsmak opened a new issue #22358:
URL: https://github.com/apache/airflow/issues/22358
### Apache Airflow version
2.2.4 (latest released)
### What happened
Currently we have this schema definition in the OpenAPI specs:
```
ScheduleInterval:
description: |
Schedule interval. Defines how often DAG runs, this object gets
added to your latest task instance's
execution_date to figure out the next schedule.
readOnly: true
oneOf:
- $ref: '#/components/schemas/TimeDelta'
- $ref: '#/components/schemas/RelativeDelta'
- $ref: '#/components/schemas/CronExpression'
discriminator:
propertyName: __type
```
The issue with above is, when using an OpenAPI generator for Java for
example (I think is same for other languages as well), it will treat
`ScheduleInterval` as **non-nullable** property, although what is returned
under `/dags/{dag_id}` or `/dags/{dag_id}/details` in case of a `None`
`schedule_interval` is `null` for `schedule_interval`.
### What you think should happen instead
We should have `nullable: true` in `ScheduleInterval` schema which will
allow `schedule_interval` to be parsed as `null`.
### How to reproduce
_No response_
### Operating System
Linux
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else
If the maintainers think is a valid bug, I will be more than happy to submit
a PR :)
### Are you willing to submit PR?
- [X] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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