jedcunningham commented on a change in pull request #21019:
URL: https://github.com/apache/airflow/pull/21019#discussion_r791045742
##########
File path: airflow/models/baseoperator.py
##########
@@ -1800,6 +1801,53 @@ def wait_for_downstream(self) -> bool:
def depends_on_past(self) -> bool:
return self.partial_kwargs.get("depends_on_past") or
self.wait_for_downstream
+ def expand_mapped_task(self, upstream_ti: "TaskInstance", session:
"Session" = NEW_SESSION) -> None:
+ """Create the mapped TaskInstances for mapped task."""
+ # TODO: support having multiuple mapped upstreams?
+ from airflow.models.taskmap import TaskMap
+ from airflow.settings import task_instance_mutation_hook
+
+ task_map_info: TaskMap = (
+ session.query(TaskMap)
+ .filter_by(
+ dag_id=upstream_ti.dag_id,
+ task_id=upstream_ti.task_id,
+ run_id=upstream_ti.run_id,
+ map_index=upstream_ti.map_index,
+ )
+ .one()
+ )
+
+ unmapped_ti: Optional[TaskInstance] =
upstream_ti.dag_run.get_task_instance(
+ self.task_id, map_index=-1, session=session
+ )
+
+ maps = range(task_map_info.length)
+
+ if unmapped_ti:
+ # The unmapped TaskInstance still exisxts -- this means we haven't
Review comment:
```suggestion
# The unmapped TaskInstance still exists -- this means we haven't
```
##########
File path: tests/models/test_dagrun.py
##########
@@ -874,3 +875,20 @@ def test_verify_integrity_task_start_date(Stats_incr,
session, run_type, expecte
assert len(tis) == expected_tis
Stats_incr.assert_called_with('task_instance_created-DummyOperator',
expected_tis)
+
+
[email protected](reason="TODO: Expand mapped literals at verify_integrity
time!")
Review comment:
I'm not sure we can _only_ have it in the mini scheduler, as that can be
turned off. Maybe toggle where it is run based on the mini scheduler being on
or off?
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