kaxil commented on a change in pull request #12530:
URL: https://github.com/apache/airflow/pull/12530#discussion_r528869389



##########
File path: airflow/models/baseoperator.py
##########
@@ -1336,6 +1336,9 @@ def get_extra_links(self, dttm: datetime, link_name: str) 
-> Optional[Dict[str,
     def get_serialized_fields(cls):
         """Stringified DAGs and operators contain exactly these fields."""
         if not cls.__serialized_fields:
+            from airflow.models.dag import DagContext
+
+            DagContext.push_context_managed_dag(None)

Review comment:
       oh yeah realized after it and added another comment :) 
   
   >ok, maybe it is not required, since we don't add any dummy task.
   
   But I am still a bit surprised that we didn't catch or found this error 
before as I am pretty sure I have used Serialized DAG with `DAG context Manager`
   




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