amoghrajesh commented on issue #46645:
URL: https://github.com/apache/airflow/issues/46645#issuecomment-2684641317
There are two problems here:
1. The dag is not able to serialise and thats the import error as stated.
2. Even after thats fixed, once we run the DAG, we run into this error:
```
Exception is Failed to populate all mapping metadata; missing: 'delay'
[2025-02-26T10:59:16.650+0000] {taskmap.py:150} ERROR - Cannot expand
'\x1b[1m<Mapped(_PythonDecoratedOperator): get_wakes>\x1b[22m' for run
manual__2025-02-26T10:59:14.919894+00:00_rxIP7h28; missing upstream values:
['delay']
[2025-02-26T10:59:16.668+0000] {scheduler_job_runner.py:744} INFO - Received
executor event with state success for task instance
TaskInstanceKey(dag_id='datetime_mapped', task_id='get_delays',
run_id='manual__2025-02-26T10:59:14.919894+00:00_rxIP7h28', try_number=1,
map_index=-1)
```
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