fix(api):Fix the issue of empty and not empty operations failing in k… (langgenius#24276)

rouxiaomin · liumin · web-flow · commit 738aaee101fb · 2025-08-21T14:43:08.000+08:00
Co-authored-by: liumin &lt;min.liu@tongdun.net&gt;
diff --git a/api/core/rag/retrieval/dataset_retrieval.py b/api/core/rag/retrieval/dataset_retrieval.py
@@ -1012,7 +1012,7 @@ def _automatic_metadata_filter_func(
     def _process_metadata_filter_func(
         self, sequence: int, condition: str, metadata_name: str, value: Optional[Any], filters: list
     ):
-        if value is None:
+        if value is None and condition not in ("empty", "not empty"):
             return
 
         key = f"{metadata_name}_{sequence}"
diff --git a/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py b/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
@@ -572,7 +572,7 @@ def _automatic_metadata_filter_func(
     def _process_metadata_filter_func(
         self, sequence: int, condition: str, metadata_name: str, value: Optional[Any], filters: list
     ):
-        if value is None:
+        if value is None and condition not in ("empty", "not empty"):
             return
 
         key = f"{metadata_name}_{sequence}"
