jens-scheffler-bosch opened a new pull request, #34248:
URL: https://github.com/apache/airflow/pull/34248
This PR adjusts the DAG level Params validation to the validation also used
during triggering and DAG constructor.
It resolves the problem reported in #34227 that params with a value of
`None` are leading to invalid/unparsable DAGs after upgrade to Airflow 2.7.1 as
a side effect of #31301 - reason is that the validation previously checked for
`has_value` assuming that the schema also defines a required field.
How to test:
* See all tests are green
* Define a DAG with the code below and see that with the fix applied, the
DAG is parse-able again and can be used:
```
@dag(
dag_id="dag-example",
start_date=datetime(2023, 2, 2, tz="America/New_York"),
schedule="41 2 * * *",
params={
"any_param": None,
},
):
...
```
closes: #34227
related: #31299, #31301
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