fix: Omit empty index types (#2745)

Signed-off-by: yangxuan <[email protected]>

Author: XuanYang-cn

pymilvus/client/prepare.py

@@ -1140,8 +1140,9 @@ def create_index_request(cls, collection_name: str, field_name: str, params: Dic
             for tk, tv in params.items():
                 if tk == "dim" and (not tv or not isinstance(tv, int)):
                     raise ParamError(message="dim must be of int!")
-                kv_pair = common_types.KeyValuePair(key=str(tk), value=utils.dumps(tv))
-                index_params.extra_params.append(kv_pair)
+                if tv:
+                    kv_pair = common_types.KeyValuePair(key=str(tk), value=utils.dumps(tv))
+                    index_params.extra_params.append(kv_pair)
 
         return index_params
 

pymilvus/milvus_client/index.py

@@ -50,10 +50,11 @@ def get_index_configs(self) -> Dict:
                 "efConstruction": 100,
             }
         """
-        return {
-            "index_type": self.index_type,
-            **self._configs,
-        }
+        configs = self._configs
+        # Omit index_type if it's empty
+        if self.index_type:
+            configs["index_type"] = self.index_type
+        return configs
 
     def to_dict(self) -> Dict:
         """All params"""