ashb commented on a change in pull request #16860:
URL: https://github.com/apache/airflow/pull/16860#discussion_r665513573
##########
File path: airflow/models/dag.py
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@@ -2379,6 +2413,8 @@ class DagModel(Base):
Index('idx_next_dagrun_create_after', next_dagrun_create_after,
unique=False),
)
+ parent_dag = relationship("DagModel", remote_side=[dag_id])
Review comment:
This relationship was added for "Duck-type compatibility" between a DAG
and a DagModel in the case of subdags -- both now have a "parent_dag" attribute.
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