ashb commented on a change in pull request #22583:
URL: https://github.com/apache/airflow/pull/22583#discussion_r840369842
##########
File path: airflow/ti_deps/deps/trigger_rule_dep.py
##########
@@ -83,6 +87,31 @@ def _get_dep_statuses(self, ti, session, dep_context:
DepContext):
session=session,
)
+ @staticmethod
+ def _count_upstreams(ti: "TaskInstance", *, session: "Session"):
+ from airflow.models.taskinstance import TaskInstance
+
+ # Optimization: Don't need to hit the database if no upstreams are
mapped.
+ upstream_task_ids = ti.task.upstream_task_ids
+ if ti.task.dag and not any(ti.task.dag.get_task(tid).is_mapped for tid
in upstream_task_ids):
Review comment:
```suggestion
if ti.task.has_dag() and not any(node.is_mapped for node in
ti.task.upstream_list):
```
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