just make online_store_ttl an int rather than timedelta

sdk/python/feast/feature_view.py

@@ -496,18 +496,18 @@ def most_recent_end_time(self) -> Optional[datetime]:
         return max([interval[1] for interval in self.materialization_intervals])
 
     @property
-    def online_store_ttl(self) -> Optional[timedelta]:
+    def online_store_ttl(self) -> Optional[int]:
         """
         Retrieves the online store TTL from the FeatureView's tags.
 
         Returns:
-            A timedelta representing the TTL, or None if not set.
+            An integer representing the TTL in seconds, or None if not set.
         """
         ttl_str = self.tags.get("online_store_ttl")
         if ttl_str:
             try:
                 ttl_seconds = int(ttl_str)
-                return timedelta(seconds=ttl_seconds)
+                return ttl_seconds
             except ValueError:
                 raise ValueError(
                     f"Invalid online_store_ttl value '{ttl_str}' in tags. It must be an integer representing seconds."

sdk/python/feast/infra/online_stores/contrib/cassandra_online_store/cassandra_online_store.py

@@ -572,8 +572,8 @@ def _create_table(self, config: RepoConfig, project: str, table: FeatureView):
         fqtable = CassandraOnlineStore._fq_table_name(keyspace, project, table)
 
         ttl = (
-            int(table.online_store_ttl.total_seconds())
-            if table.online_store_ttl
+            table.online_store_ttl
+            if table.online_store_ttl is not None
             else config.online_store.ttl
         )
         table_options = f" AND default_time_to_live = {ttl}" if ttl is not None else ""