uranusjr commented on code in PR #32646:
URL: https://github.com/apache/airflow/pull/32646#discussion_r1318194790


##########
airflow/models/taskinstance.py:
##########
@@ -895,6 +895,19 @@ def refresh_from_db(self, session: Session = NEW_SESSION, 
lock_for_update: bool
         else:
             self.state = None
 
+    @classmethod
+    def get_by_key(cls, ti_key, session) -> TaskInstance:
+        return (
+            session.query(TaskInstance)
+            .filter(
+                TaskInstance.task_id == ti_key.task_id,
+                TaskInstance.dag_id == ti_key.dag_id,
+                TaskInstance.run_id == ti_key.run_id,
+                TaskInstance.map_index == ti_key.map_index,
+            )
+            .one_or_none()
+        )

Review Comment:
   Putting the logic in `_render_filename` seems fine to me. Or in a free 
function.



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