Can't select the desired dag version for a backfill dag run

[RNHTTR]

Apache Airflow version

3.0.0

If "Other Airflow 2 version" selected, which one?

No response

What happened?

I am making a bunch of edits to a dag, and I want to re-run a backfill for a specified date range. When I do, Airflow performs the backfill with the version of the dag that originally ran, and there's seemingly no way in the UI to specify that I want to re-run using the latest dag version.

What you think should happen instead?

The latest version should maybe be the default version for backfills, and users should be able to select the version that runs.

How to reproduce

1. Run a backfill over a certain date.
2. Update the dag code
3. Run a backfill over the same date from (1)

Operating System

n/a

Versions of Apache Airflow Providers

n/a

Deployment

Astronomer

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

• I agree to follow this project's Code of Conduct

[vatsrahul1001]

@RNHTTR are you using localbundle or gitbundle?

[aritra24]

From the code for the api

def _create_backfill(
...
):
   ...
    with create_session() as session:
        serdag = session.scalar(SerializedDagModel.latest_item_select_object(dag_id))

I think it doesn't allow selecting a dag version right now and just uses the latest available version?

[RNHTTR]

[aritra24]

Huh, I'll check out the code once more. I'm just not sure on the expectation of if we do want to allow providing a version field.

If we decide on yes, I can go about making the change.

[aritra24]

@RNHTTR I think there was some decision made here #49097 for how the version of dag is decided. @dstandish do you have any opinions on this?

[Cir02]

Hi, is this issue solve? i can take care of this one as good first issue