use optional union didnt work

2026-02-21 06:33:41 +00:00 · 2024-02-02 12:05:36 -08:00
parent dbd87706dc
commit 724614a084
1 changed files with 1 additions and 1 deletions
--- a/libs/core/langchain_core/tools.py
+++ b/libs/core/langchain_core/tools.py
@@ -49,7 +49,7 @@ def _create_subset_model(
            # this isn't perfect but should work for most functions
            field.outer_type_
            if field.required and not field.allow_none
-            else Union[field.outer_type_, None]
+            else Optional[field.outer_type_]
        )
        fields[field_name] = (t, field.field_info)
    rtn = create_model(name, **fields)  # type: ignore