ephraimbuddy commented on code in PR #47557:
URL: https://github.com/apache/airflow/pull/47557#discussion_r2010184605


##########
airflow/api_fastapi/core_api/routes/public/dags.py:
##########
@@ -246,6 +247,23 @@ def patch_dag(
 
     data = patch_body.model_dump(include=fields_to_update, by_alias=True)
 
+    is_paused = data.get("is_paused")
+
+    active_dag_runs = session.scalars(
+        select(DagRun).filter(
+            DagRun.dag_id == dag_id, DagRun.state.in_([DagRunState.RUNNING, 
DagRunState.QUEUED])
+        )
+    ).all()
+
+    for dag_run in active_dag_runs:
+        if is_paused:
+            dag_run.set_state(DagRunState.QUEUED)

Review Comment:
   What do you think about failing all running dagruns once the dag is paused? 
Skipping those that are not running. Just the way we handle dagrun timeout



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