venv

1 files changed, 54 insertions, 0 deletions

diff --git a/venv/lib/python3.11/site-packages/litestar/dto/msgspec_dto.py b/venv/lib/python3.11/site-packages/litestar/dto/msgspec_dto.py
new file mode 100644
index 0000000..826a1d2
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/litestar/dto/msgspec_dto.py
@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+from dataclasses import replace
+from typing import TYPE_CHECKING, Generic, TypeVar
+
+from msgspec import NODEFAULT, Struct, structs
+
+from litestar.dto.base_dto import AbstractDTO
+from litestar.dto.data_structures import DTOFieldDefinition
+from litestar.dto.field import DTO_FIELD_META_KEY, DTOField
+from litestar.types.empty import Empty
+
+if TYPE_CHECKING:
+    from typing import Any, Collection, Generator
+
+    from litestar.typing import FieldDefinition
+
+
+__all__ = ("MsgspecDTO",)
+
+T = TypeVar("T", bound="Struct | Collection[Struct]")
+
+
+class MsgspecDTO(AbstractDTO[T], Generic[T]):
+    """Support for domain modelling with Msgspec."""
+
+    @classmethod
+    def generate_field_definitions(cls, model_type: type[Struct]) -> Generator[DTOFieldDefinition, None, None]:
+        msgspec_fields = {f.name: f for f in structs.fields(model_type)}
+
+        def default_or_empty(value: Any) -> Any:
+            return Empty if value is NODEFAULT else value
+
+        def default_or_none(value: Any) -> Any:
+            return None if value is NODEFAULT else value
+
+        for key, field_definition in cls.get_model_type_hints(model_type).items():
+            msgspec_field = msgspec_fields[key]
+            dto_field = (field_definition.extra or {}).pop(DTO_FIELD_META_KEY, DTOField())
+
+            yield replace(
+                DTOFieldDefinition.from_field_definition(
+                    field_definition=field_definition,
+                    dto_field=dto_field,
+                    model_name=model_type.__name__,
+                    default_factory=default_or_none(msgspec_field.default_factory),
+                ),
+                default=default_or_empty(msgspec_field.default),
+                name=key,
+            )
+
+    @classmethod
+    def detect_nested_field(cls, field_definition: FieldDefinition) -> bool:
+        return field_definition.is_subclass_of(Struct)