fix: BaseModel.get_field_root_type supports UnionType

Author: azmeuk

doc/changelog.rst

@@ -8,6 +8,7 @@ Added
 ^^^^^
 - Python 3.13 support.
 - Proper Base64 serialization. #31
+- :meth:`~BaseModel.get_field_root_type` supports :data:`~typing.UnionType`.
 
 Changed
 ^^^^^^^

scim2_models/base.py

@@ -2,6 +2,7 @@
 from enum import Enum
 from enum import auto
 from inspect import isclass
+from types import UnionType
 from typing import Annotated
 from typing import Any
 from typing import Generic
@@ -437,7 +438,7 @@ def get_field_root_type(cls, attribute_name: str) -> type:
         attribute_type = cls.model_fields[attribute_name].annotation
 
         # extract 'x' from 'Optional[x]'
-        if get_origin(attribute_type) is Union:
+        if get_origin(attribute_type) in (Union, UnionType):
             attribute_type = get_args(attribute_type)[0]
 
         # extract 'x' from 'List[x]'