ashb opened a new pull request #21210:
URL: https://github.com/apache/airflow/pull/21210
In order to do this there were two steps required:
- The BackfillJob needs to know about mapped tasks, both to expand them, and
in order to update it's TI tracking
- The DebugExecutor needed to "unmap" the mapped task to get the real
operator bacj
I was testing this with the following dag:
```python
from airflow import DAG
from airflow.decorators import task
from airflow.operators.python import PythonOperator
import pendulum
@task
def make_list():
return list(map(lambda a: f'echo "{a!r}"', [1, 2, {'a': 'b'}]))
def consumer(*args):
print(repr(args))
with DAG(dag_id='maptest', start_date=pendulum.DateTime(2022, 1, 18)) as dag:
PythonOperator(task_id='consumer',
python_callable=consumer).map(op_args=make_list())
```
It can't "unmap" decorated operators successfully yet, so we're using
old-school PythonOperator
We also just pass the whole value to the operator, not just the current
mapping value(s)
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