Fix

langchain-ai · Dec 18, 2024 · 39281c8 · 39281c8
1 parent 4c3a38d
commit 39281c8
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/libs/langgraph/langgraph/types.py b/libs/langgraph/langgraph/types.py
@@ -292,8 +292,10 @@ def _update_as_tuples(self) -> Sequence[tuple[str, Any]]:
             for t in self.update
         ):
             return self.update
-        else:
+        elif self.update is not None:
             return [("__root__", self.update)]
+        else:
+            return []
 
     PARENT: ClassVar[Literal["__parent__"]] = "__parent__"