added redis-flat

Author: fcostaoliveira

engine/clients/redis/search.py

@@ -113,7 +113,9 @@ def search_one(cls, vector, meta_conditions, top) -> List[Tuple[int, float]]:
         if cls.algorithm == "HNSW":
             # 'EF_RUNTIME' is irrelevant for 'ADHOC_BF' policy
             if cls.hybrid_policy != "ADHOC_BF":
-                params_dict["EF"] = cls.search_params["search_params"]["ef"]
+                # Only set EF if it exists in search params (not needed for FLAT)
+                if "ef" in cls.search_params["search_params"]:
+                    params_dict["EF"] = cls.search_params["search_params"]["ef"]
         if cls.algorithm == "SVS-VAMANA":
             params_dict["WS_SEARCH"] = cls.search_params["search_params"]["WS_SEARCH"]
         results = cls._ft.search(q, query_params=params_dict)