shivaam commented on issue #46250:
URL: https://github.com/apache/airflow/issues/46250#issuecomment-4211551620
Hi @dstandish — I'd like to pick this up.
I started with a prototype in #64089 (adding state counts directly to
`BackfillResponse`), but based on feedback from @uranusjr and thinking through
the design, I'm going to take a different approach:
**Plan: New `GET /backfills/{backfill_id}/dag_runs` endpoint**
This would return the `BackfillDagRun` entries with their linked `DagRun`
state, logical_date, and exception_reason (for skipped slots). The UI can then
compute progress counts client-side.
Benefits over enriching `BackfillResponse`:
- Keeps the backfill model stable
- Returns the actual dag run data (not just aggregated counts)
- Enables linking individual dag runs to backfills in the UI
- Supports future CLI `airflow backfill status` use case
I'll close #64089 and open a new PR with this approach. Let me know if you
have any thoughts on the response shape or if there are specific fields you'd
want exposed.
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