[GitHub] [airflow] uranusjr commented on a change in pull request #15585: `func.sum` may returns `Decimal` that break rest APIs.

[GitBox]

uranusjr commented on a change in pull request #15585:
URL: https://github.com/apache/airflow/pull/15585#discussion_r622996974



##########
File path: airflow/models/pool.py
##########
@@ -161,12 +161,13 @@ def occupied_slots(self, session: Session):
         """
         from airflow.models.taskinstance import TaskInstance  # Avoid circular 
import
 
-        return (
+        return int(
             session.query(func.sum(TaskInstance.pool_slots))
             .filter(TaskInstance.pool == self.pool)
             .filter(TaskInstance.state.in_(list(EXECUTION_STATES)))
             .scalar()
-        ) or 0
+            or 0

Review comment:
       This is the implementation, there's no magic at all. I guess the SO 
answer is inaccurate.
   
   
https://github.com/sqlalchemy/sqlalchemy/blob/b703a9c1be728077e4709c377b0b29a94c052a0b/lib/sqlalchemy/orm/query.py#L2818-L2824




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