aamster opened a new issue, #28940:
URL: https://github.com/apache/airflow/issues/28940
### Apache Airflow version
2.5.0
### What happened
I have a dag like
```
import datetime
from airflow.models import Param
from airflow.models.dag import dag
@dag(
dag_id="foo",
schedule=None,
params={'month': Param()},
start_date=datetime.datetime.now()
)
def foo():
pass
foo()
```
I am trying to pass this param via CLI. I tried passing it like
```
airflow dags test foo --conf '{"month": "2022-01"}'
```
gives
```
airflow.exceptions.ParamValidationError: Invalid input for param month: No
value passed and Param has no default value
```
This is not answered on doc page
https://airflow.apache.org/docs/apache-airflow/stable/concepts/params.html
### What you think should happen instead
`month` should be passed to the dag
### How to reproduce
_No response_
### Operating System
mac osx
### Versions of Apache Airflow Providers
_No response_
### Deployment
Virtualenv installation
### Deployment details
_No response_
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] 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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