ephraimbuddy opened a new pull request, #55139:
URL: https://github.com/apache/airflow/pull/55139
DagBag is not a DB model, it’s the parser/collector used by the dag
processor. This change moves it to a more natural home under
airflow/dag_processing, reduces confusion between “DBDagBag” and "DagBag",
and helps avoid import tangles.
**What changed:**
New module: airflow.dag_processing.dagbag now hosts: DagBag,
_capture_with_reraise, FileLoadStat, timeout, sync_bag_to_db
Old location airflow.models.dagbag:
Trimmed to DB-facing helpers (DBDagBag, etc.)
Adds __getattr__ shim for backward compatibility.
Updated imports across the codebase
Pre-commit path allowlist updated to include the new file and remove the old
path.
**Deprecation & migration**
Deprecated: from airflow.models.dagbag import DagBag
Use instead: from airflow.dag_processing.dagbag import DagBag
A deprecation warning is emitted via the shim; no functional behavior change
intended.
**Notes**
No runtime logic changes to parsing or DAG discovery.
Tests and CLI code updated to the new import path.
sync_bag_to_db moved alongside DagBag to keep parsing + persistence in one
place.
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