[GitHub] [airflow] ashb commented on a diff in pull request #22975: Resolve XComArg's before trying to unmap MappedOperators

[GitBox <gi...@apache.org>]

ashb commented on code in PR #22975:
URL: https://github.com/apache/airflow/pull/22975#discussion_r849652248


##########
airflow/models/mappedoperator.py:
##########
@@ -670,10 +675,12 @@ def prepare_for_execution(self) -> "MappedOperator":
         # we don't need to create a copy of the MappedOperator here.
         return self
 
+    @provide_session
     def render_template_fields(
         self,
         context: Context,
         jinja_env: Optional["jinja2.Environment"] = None,
+        session: Session = NEW_SESSION,

Review Comment:
   Oh probably yeah. (It's a mess. I don't like that `@provide_session` expunges all. Add it to the list to fix)



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