fix weaviate delete issue

api/core/rag/datasource/vdb/weaviate/weaviate_vector.py

@@ -168,11 +168,11 @@ class WeaviateVector(BaseVector):
         # check whether the index already exists
         schema = self._default_schema(self._collection_name)
         if self._client.schema.contains(schema):
+            for uuid in ids:
                 try:
-                self._client.batch.delete_objects(
+                    self._client.data_object.delete(
                         class_name=self._collection_name,
-                    where={"operator": "ContainsAny", "path": ["id"], "valueTextArray": ids},
-                    output="minimal",
+                        uuid=uuid,
                     )
                 except weaviate.UnexpectedStatusCodeException as e:
                     # tolerate not found error