Daniel Huang created AIRFLOW-883: ------------------------------------ Summary: Assigning operator to DAG via bitwise composition does not pickup default args Key: AIRFLOW-883 URL: https://issues.apache.org/jira/browse/AIRFLOW-883 Project: Apache Airflow Issue Type: Bug Components: models Reporter: Daniel Huang Priority: Minor
This is only the case when the operator does not specify {{dag=dag}} and is not initialized within a DAG's context manager (due to https://github.com/apache/incubator-airflow/blob/fb0c5775cda4f84c07d8d5c0e6277fc387c172e6/airflow/utils/decorators.py#L50) Example: {code} default_args = { 'owner': 'airflow', 'start_date': datetime(2017, 2, 1) } dag = DAG('my_dag', default_args=default_args) dummy = DummyOperator(task_id='dummy') dag >> dummy {code} This will raise a {{Task is missing the start_date parameter}}. I _think_ this should probably be allowed because I assume the purpose of supporting {{dag >> op}} was to allow delayed assignment of an operator to a DAG. I believe to fix this, on assignment, we would need to go back and go through dag.default_args to see if any of those attrs weren't explicitly set on task...not the cleanest. -- This message was sent by Atlassian JIRA (v6.3.15#6346)