[jira] [Resolved] (AIRFLOW-3958) Support list type as upstream in helper.chain

["Kaxil Naik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kaxil Naik resolved AIRFLOW-3958.
---------------------------------
       Resolution: Fixed
    Fix Version/s:     (was: 1.10.2)
                   1.10.4

> Support list type as upstream in helper.chain
> ---------------------------------------------
>
>                 Key: AIRFLOW-3958
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-3958
>             Project: Apache Airflow
>          Issue Type: Improvement
>          Components: utils
>    Affects Versions: 1.10.2
>            Reporter: zhongjiajie
>            Assignee: zhongjiajie
>            Priority: Major
>              Labels: patch
>             Fix For: 1.10.4
>
>
> For now on, `airflow.utils.helpers.chain` only support list as downstream, but not upstream. This ticket is to support list as upstream.
> Only support
> {code:java}
> task_1 --> task_2 --> task_3 --> task_4
> or
>                   /--> task_3
> task_1 --> task_2 
>                   \--> task_4{code}
> This improvement to be support
> {code:java}
>                   /--> task_3 \
> task_1 --> task_2              --> task_5
>                   \--> task_4 /
> {code}



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