Apache airflow macro to get last dag run execution time

Question

I thought the macro prev_execution_date listed here would get me the execution date of the last DAG run, but looking at the source code it seems to only get the

Answer 1

You can make your own user custom macro function, use airflow model to search meta-database.

def get_last_dag_run(dag_id):
  //TODO search DB
  return xxx

dag = DAG(
    'example',
    schedule_interval='0 1 * * *',
    user_defined_macros={
        'last_dag_run_execution_date': get_last_dag_run,
    }
)

Then use the KEY in your template.