Add try/except + rollback for fact notifications

app/dao/fact_notification_status_dao.py

@@ -2,7 +2,7 @@
 
 from flask import current_app
 from sqlalchemy import Date, case, func
-from sqlalchemy.dialects.postgresql import insert
+from sqlalchemy.exc import IntegrityError
 from sqlalchemy.sql.expression import extract, literal
 from sqlalchemy.types import DateTime, Integer
 
@@ -106,29 +106,42 @@ def query_for_fact_status_data(table, start_date, end_date, notification_type, s
 
 
 def update_fact_notification_status(data, process_day, service_ids=None):
-    table = FactNotificationStatus.__table__
     if service_ids:
         FactNotificationStatus.query.filter(
             FactNotificationStatus.bst_date == process_day, FactNotificationStatus.service_id.in_(service_ids)
         ).delete()
     else:
         FactNotificationStatus.query.filter(FactNotificationStatus.bst_date == process_day).delete()
 
-    for row in data:
-        stmt = insert(table).values(
-            bst_date=process_day,
-            template_id=row.template_id,
-            service_id=row.service_id,
-            job_id=row.job_id,
-            notification_type=row.notification_type,
-            key_type=row.key_type,
-            notification_status=row.status,
-            notification_count=row.notification_count,
-            billable_units=row.billable_units,
-        )
-        db.session.connection().execute(stmt)
+    # Prepare bulk insert data
+    bulk_insert_data = [
+        {
+            "bst_date": process_day,
+            "template_id": row.template_id,
+            "service_id": row.service_id,
+            "job_id": row.job_id,
+            "notification_type": row.notification_type,
+            "key_type": row.key_type,
+            "notification_status": row.status,
+            "notification_count": row.notification_count,
+            "billable_units": row.billable_units,
+        }
+        for row in data
+    ]
+    try:
+        if bulk_insert_data:
+            db.session.bulk_insert_mappings(FactNotificationStatus, bulk_insert_data)
         db.session.commit()
 
+    except IntegrityError as e:
+        db.session.rollback()
+        current_app.logger.error(f"Integrity error in update_fact_notification_status: {e}")
+        raise
+    except Exception as e:
+        db.session.rollback()
+        current_app.logger.error(f"Unexpected error in update_fact_notification_status: {e}")
+        raise
+
 
 def fetch_notification_status_for_service_by_month(start_date, end_date, service_id):
     filters = [