[jira] [Created] (AIRFLOW-5840) Add a link to the external task that ExternalTaskSensor is waiting for

["Qian Yu (Jira)" <ji...@apache.org>]

Qian Yu created AIRFLOW-5840:
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             Summary: Add a link to the external task that ExternalTaskSensor is waiting for
                 Key: AIRFLOW-5840
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-5840
             Project: Apache Airflow
          Issue Type: Improvement
          Components: operators
    Affects Versions: 1.10.6
            Reporter: Qian Yu


When using ExternalTaskSensor, there's no indication on the Web UI regarding which task the sensor is waiting for. Does anyone have ideas for improving this? 

One idea is to override the get_link() abstract method of ExternalTaskSensor and point it to the task that the sensor waits for. Maybe something like this (just for demo, not tested and likely not working):
{code:python}
def get_link(self, operator: BaseOperator, dttm: datetime) -> str:
     return "{}?dag_id={}&task_id={}&execution_date={}".format(conf["base_url"], self.external_task_id, self.execution_date.isoformat())
{code}



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