In airflow, is there a good way to call another dag's task?

Question

I've got dag_prime and dag_tertiary.

• dag_prime: Scans through a directory and intends to call dag_tertiary on each one. Currently a PythonOperator.
• dag_tertiary: Scans through the directory passed to it and does (possibly time-intensive) calculations on the contents thereof.

I can call the secondary one from a system call from the python operator, but i feel like there's got to be a better way. I'd also like to consider queuing the dag_tertiary calls, if there's a simple way to do that. Is there a better way than using system calls?

Thanks!

Answer 1

Use TriggerDagRunOperator for calling one DAG from another.

The details can be found at https://airflow.apache.org/code.html?highlight=triggerdagrun#airflow.operators.TriggerDagRunOperator

Following post gives a good example of using this operator: https://www.linkedin.com/pulse/airflow-lesson-1-triggerdagrunoperator-siddharth-anand