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Posted to commits@airflow.apache.org by "Adam C Baker (JIRA)" <ji...@apache.org> on 2019/01/02 18:22:00 UTC

[jira] [Created] (AIRFLOW-3620) Inlets and outlets are always empty in bash operator templates

Adam C Baker created AIRFLOW-3620:
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             Summary: Inlets and outlets are always empty in bash operator templates
                 Key: AIRFLOW-3620
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-3620
             Project: Apache Airflow
          Issue Type: Bug
    Affects Versions: 1.10.1
            Reporter: Adam C Baker


When creating a data pipeline where one task's input is its upstream task's output, it seems the only way to automatically coordinate these is to use the lineage feature and set `inlets = \{"auto": True}`. Doing this with a PythonOperator allows one to get the input and output data sources for the task by passing in the context and getting `task.inlets` and `task.outlets` values.

This fails with the BashOperator. With a template including something like `\{{task.inlets[0]}}`, it throws an exception, and templating with `\{{task.inlets}}` or `\{{task.outlets}}` always reveals these values to be an empty list.



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