[GitHub] [airflow] ephraimbuddy commented on a change in pull request #15174: raise AlreadyExists exception when the execution_date is same

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

ephraimbuddy commented on a change in pull request #15174:
URL: https://github.com/apache/airflow/pull/15174#discussion_r606672209



##########
File path: airflow/api_connexion/endpoints/dag_run_endpoint.py
##########
@@ -240,6 +240,18 @@ def post_dag_run(dag_id, session):
         post_body = dagrun_schema.load(request.json, session=session)
     except ValidationError as err:
         raise BadRequest(detail=str(err))
+
+    dagrun_with_execution_date = (
+        session.query(DagRun).filter(DagRun.dag_id == dag_id,
+                                     DagRun.execution_date == post_body["execution_date"]).first()
+    )
+
+    if dagrun_with_execution_date:
+        raise AlreadyExists(
+            detail=f"DAGRun with DAG ID: '{dag_id}' and DAGRun ExecutionDate: '{post_body['execution_date']}' already "
+                   f"exists"
+        )
+

Review comment:
       Can you add execution_date to the filter in line 256 instead of another query?




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