Fix/vdb lindorm (#16660)

Co-authored-by: jiangzhijie <jiangzhijie.jzj@alibaba-inc.com>

api/core/rag/datasource/vdb/lindorm/lindorm_vector.py

         if response["errors"]:
             for item in response["items"]:
                 print(f"{item['index']['status']}: {item['index']['error']['type']}")
-        else:
-            self.refresh()
 
     def get_ids_by_metadata_field(self, key: str, value: str):
         query: dict[str, Any] = {
         if not all(isinstance(x, float) for x in query_vector):
             raise ValueError("All elements in query_vector should be floats")
 
-        top_k = kwargs.get("top_k", 10)
+        top_k = kwargs.get("top_k", 3)
         document_ids_filter = kwargs.get("document_ids_filter")
         filters = []
         if document_ids_filter:
         must_not = kwargs.get("must_not")
         should = kwargs.get("should")
         minimum_should_match = kwargs.get("minimum_should_match", 0)
-        top_k = kwargs.get("top_k", 10)
+        top_k = kwargs.get("top_k", 3)
         filters = kwargs.get("filter", [])
         document_ids_filter = kwargs.get("document_ids_filter")
         if document_ids_filter:
 
 
 def default_text_mapping(dimension: int, method_name: str, **kwargs: Any) -> dict:
-    excludes_from_source = kwargs.get("excludes_from_source")
+    excludes_from_source = kwargs.get("excludes_from_source", False)
     analyzer = kwargs.get("analyzer", "ik_max_word")
     text_field = kwargs.get("text_field", Field.CONTENT_KEY.value)
     engine = kwargs["engine"]
 
     if excludes_from_source:
         # e.g. {"excludes": ["vector_field"]}
-        mapping["mappings"]["_source"] = {"excludes": excludes_from_source}
+        mapping["mappings"]["_source"] = {"excludes": [vector_field]}
 
     if using_ugc and method_name == "ivfpq":
         mapping["settings"]["index"]["knn_routing"] = True
         mapping["settings"]["index"]["knn.offline.construction"] = True
-    elif using_ugc and method_name == "hnsw" or using_ugc and method_name == "flat":
+    elif (using_ugc and method_name == "hnsw") or (using_ugc and method_name == "flat"):
         mapping["settings"]["index"]["knn_routing"] = True
     return mapping
 
         "query": {"knn": {vector_field: {"vector": query_vector, "k": k}}},
     }
 
-    if filters is not None:
+    if filters is not None and len(filters) > 0:
         # when using filter, transform filter from List[Dict] to Dict as valid format
         filter_dict = {"bool": {"must": filters}} if len(filters) > 1 else filters[0]
         search_query["query"]["knn"][vector_field]["filter"] = filter_dict  # filter should be Dict