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https://issues.apache.org/jira/browse/AIRFLOW-1022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16490119#comment-16490119
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Ruslan Sivak commented on AIRFLOW-1022:
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This is marked as an easy fix. Why hasn't it been done in over a year?
I am running into this problem now as well - there is no way to pass something
from a task into a subdag.
> Subdag can't receive templated fields
> -------------------------------------
>
> Key: AIRFLOW-1022
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1022
> Project: Apache Airflow
> Issue Type: Improvement
> Components: subdag
> Reporter: Marcos Takahashi
> Priority: Major
> Labels: easyfix
>
> Subdag's can't receive any templated fields as the Operator is setted as
> tuple()
> (https://github.com/apache/incubator-airflow/blob/master/airflow/operators/subdag_operator.py#L24)
> instead of any other templated dict like on PythonOperator
> (https://github.com/apache/incubator-airflow/blob/master/airflow/operators/python_operator.py#L52).
> That makes impossible on getting some important values like execution_date.
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