[GitHub] [airflow] ielizarov commented on issue #12757: Graph View is empty when Operator has multiline string in args (v2.0)

[GitBox <gi...@apache.org>]

ielizarov commented on issue #12757:
URL: https://github.com/apache/airflow/issues/12757#issuecomment-738040222


   @kaxil Sure, here it is. I simplified my DAG, this version gives the same error exactly. You'll need to add TEST_VAR to Airflow DB.
   
   `"""Demo DAG"""
   
   from datetime import timedelta
   
   from airflow import DAG
   from airflow.contrib.operators.kubernetes_pod_operator import KubernetesPodOperator
   from airflow.utils.dates import days_ago
   
   args = {
       'owner': 'airflow',
   }
   dag = DAG(
       dag_id='demo_test',
       default_args=args,
       schedule_interval='0 0 * * *',
       start_date=days_ago(2),
       dagrun_timeout=timedelta(minutes=60),
       tags=['demo'],
       params={
           "pod_op_image": "localhost:5000/my-image:latest",
           "pod_op_image_pull_policy": "IfNotPresent",
       },
   )
   
   env_params = {
       "TEST_ENV_VAR": "TEST ENV VAR",
   }
   normal_op = KubernetesPodOperator(
       dag=dag,
       name='normal_op',
       task_id='normal_op',
       namespace='airflow',
       image="{{ dag_run.conf['pod_op_image'] }}",
       image_pull_policy="{{ dag_run.conf['pod_op_image_pull_policy'] }}",
       env_vars=env_params,
       cmds=["/bin/bash", "-c"],
       arguments=["echo $TEST_ENV_VAR"],
   )
   #below is templated multi-string var which is used as argument further
   templated_command = """
           echo "{{ var.value.TEST_VAR}}"
           echo "{{ params.my_param }}"
       """
   templated_op = KubernetesPodOperator(
       name='templated_op',
       task_id='templated_op',
       namespace='airflow',
       image="{{ dag_run.conf['pod_op_image'] }}",
       image_pull_policy="{{ dag_run.conf['pod_op_image_pull_policy'] }}",
       cmds=["bash", "-c"],
       arguments=[templated_command],
       params={'my_param': 'Passed_Parameter'},
   )
   
   normal_op >> templated_op
   
   if __name__ == "__main__":
       dag.cli()
   `


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