Switch to private methods

litestar/contrib/sqlalchemy/dto.py

@@ -21,7 +21,7 @@
 )
 
 from litestar.dto.base_dto import AbstractDTO
-from litestar.dto.config import SQLAlchemyDTOConfig
+from litestar.dto.config import DTOConfig, SQLAlchemyDTOConfig
 from litestar.dto.data_structures import DTOFieldDefinition
 from litestar.dto.field import DTO_FIELD_META_KEY, DTOField, Mark
 from litestar.exceptions import ImproperlyConfiguredException
@@ -48,12 +48,17 @@ class SQLAlchemyDTO(AbstractDTO[T], Generic[T]):
     config: ClassVar[SQLAlchemyDTOConfig]
 
     @staticmethod
-    def adapt_dto_config(config: Any) -> SQLAlchemyDTOConfig:
+    def _ensure_sqla_dto_config(config: DTOConfig | SQLAlchemyDTOConfig) -> SQLAlchemyDTOConfig:
         if not isinstance(config, SQLAlchemyDTOConfig):
             return SQLAlchemyDTOConfig(**asdict(config))
 
         return config
 
+    def __init_subclass__(cls, **kwargs: Any) -> None:
+        super().__init_subclass__(**kwargs)
+        if hasattr(cls, "config"):
+            cls.config = cls._ensure_sqla_dto_config(cls.config)
+
     @singledispatchmethod
     @classmethod
     def handle_orm_descriptor(

litestar/dto/base_dto.py

@@ -50,11 +50,6 @@ class AbstractDTO(Generic[T]):
 
     _dto_backends: ClassVar[dict[str, _BackendDict]] = {}
 
-    def __init_subclass__(cls, **kwargs: Any) -> None:
-        super().__init_subclass__(**kwargs)
-        if hasattr(cls, "config"):
-            cls.config = cls.adapt_dto_config(cls.config)
-
     def __init__(self, asgi_connection: ASGIConnection) -> None:
         """Create an AbstractDTOFactory type.
 
@@ -88,10 +83,6 @@ def __class_getitem__(cls, annotation: Any) -> type[Self]:
 
         return type(f"{cls.__name__}[{annotation}]", (cls,), cls_dict)
 
-    @staticmethod
-    def adapt_dto_config(config: DTOConfig) -> Any:
-        return config
-
     def decode_builtins(self, value: dict[str, Any]) -> Any:
         """Decode a dictionary of Python values into an the DTO's datatype."""