fix: redis backend and knowledge log (#306)

* fix: redis backend
* fix: log of kb

Author: zakahan

veadk/knowledgebase/backends/redis_backend.py

@@ -113,16 +113,16 @@ def model_post_init(self, __context: Any) -> None:
         self._vector_store = RedisVectorStore(
             schema=self._schema,
             redis_client=self._redis_client,
-            overwrite=True,
+            overwrite=False,
             collection_name=self.index,
         )
 
         self._storage_context = StorageContext.from_defaults(
             vector_store=self._vector_store
         )
 
-        self._vector_index = VectorStoreIndex.from_documents(
-            documents=[],
+        self._vector_index = VectorStoreIndex(
+            nodes=[],
             storage_context=self._storage_context,
             embed_model=self._embed_model,
         )

veadk/knowledgebase/knowledgebase.py

@@ -199,7 +199,7 @@ def model_post_init(self, __context: Any) -> None:
         )
         self._backend = _get_backend_cls(self.backend)(index=self.index)
         logger.info(
-            f"Initialized knowledgebase with backend {self.backend.__class__.__name__}"
+            f"Initialized knowledgebase with backend {self._backend.__class__.__name__}"
         )
 
     def add_from_directory(self, directory: str, **kwargs) -> bool: