fix(kb): skip knowledge base retrieval if query is empty or whitespace

Author: Rat0323

astrbot/core/knowledge_base/retrieval/manager.py

@@ -80,13 +80,17 @@ async def retrieve(
         Args:
             query: 查询文本
             kb_ids: 知识库 ID 列表
+            kb_id_helper_map: 知识库助手映射
+            top_k_fusion: 融合召回的数量
             top_m_final: 最终返回数量
-            enable_rerank: 是否启用 Rerank
 
         Returns:
             List[RetrievalResult]: 检索结果列表
 
         """
+        if not isinstance(query, str) or not query.strip():
+            return []
+
         if not kb_ids:
             return []
 
@@ -163,11 +167,16 @@ async def retrieve(
                         content=fr.content,
                         score=fr.score,
                         metadata={
-                            "chunk_index": fr.chunk_index,
+                            "chunk_index": getattr(fr, "chunk_index", None),
                             "char_count": len(fr.content),
                         },
                     ),
                 )
+            else:
+                logger.warning(
+                    f"Metadata for document {fr.doc_id} not found in database, "
+                    f"skipping chunk {fr.chunk_id}."
+                )
 
         # 5. Rerank
         first_rerank = None