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Fix TaskInstance.get_dagrun returning None in task_instance_mutation_hook #60726

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Fix TaskInstance.get_dagrun returning None in task_instance_mutation_hook #60726

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5 changes: 4 additions & 1 deletion airflow-core/src/airflow/models/taskinstance.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1005,7 +1005,10 @@ def get_dagrun(self, session: Session = NEW_SESSION) -> DagRun:
:return: DagRun
"""
info: Any = inspect(self)
if info.attrs.dag_run.loaded_value is not NO_VALUE:
# If dag_run is loaded and not None, return it.
# In early lifecycle phases (e.g. task_instance_mutation_hook),
# dag_run may be marked as loaded but still be None.
if info.attrs.dag_run.loaded_value is not NO_VALUE and self.dag_run is not None:
if getattr(self, "task", None) is not None:
if TYPE_CHECKING:
assert self.task
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