Source code for airflow.example_dags.example_trigger_target_dag

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Example usage of the TriggerDagRunOperator. This example holds 2 DAGs:
1. 1st DAG (example_trigger_controller_dag) holds a TriggerDagRunOperator, which will trigger the 2nd DAG
2. 2nd DAG (example_trigger_target_dag) which will be triggered by the TriggerDagRunOperator in the 1st DAG

from __future__ import annotations

import pendulum

from airflow.decorators import task
from airflow.models.dag import DAG
from airflow.operators.bash import BashOperator

[docs]def run_this_func(dag_run=None): """ Print the payload "message" passed to the DagRun conf attribute. :param dag_run: The DagRun object """ print(f"Remotely received value of {dag_run.conf.get('message')} for key=message")
with DAG( dag_id="example_trigger_target_dag", start_date=pendulum.datetime(2021, 1, 1, tz="UTC"), catchup=False, schedule=None, tags=["example"], ) as dag:
[docs] run_this = run_this_func()
bash_task = BashOperator( task_id="bash_task", bash_command='echo "Here is the message: $message"', env={"message": '{{ dag_run.conf.get("message") }}'}, )

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