fix: rollback removal of pipe instead of Optional since it's not full…

…y supported in 3.9 yet...

src/ninja_crud/views/api_view.py

@@ -2,7 +2,7 @@
 import asyncio
 import functools
 import typing
-from typing import TYPE_CHECKING, Any, Callable
+from typing import TYPE_CHECKING, Any, Callable, Optional, Union
 
 import django.db.models
 import ninja
@@ -78,7 +78,7 @@ def __init__(
             self,
             response_schema: Any = NOT_SET,
             model: type[models.Model] | None = None,
-            name: str | None = None,
+            name: Optional[str] = None,
         ) -> None:
             super().__init__(
                 path="/{id}",
@@ -100,7 +100,7 @@ def __init__(
             self,
             response_schema: Any = NOT_SET,
             model: type[models.Model] | None = None,
-            name: str | None = None,
+            name: Optional[str] = None,
         ) -> None:
             super().__init__(
                 path="/async/{id}",
@@ -189,14 +189,14 @@ class DepartmentViewSet(APIViewSet):
     def __init__(
         self,
         path: str,
-        methods: list[str] | set[str],
+        methods: Union[list[str], set[str]],
         *,
         response_schema: Any = NOT_SET,
-        status_code: int | None = None,
-        responses: dict[int, Any] | None = None,
-        name: str | None = None,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        status_code: Optional[int] = None,
+        responses: Optional[dict[int, Any]] = None,
+        name: Optional[str] = None,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         self.path = path
         self.methods = methods
@@ -206,9 +206,9 @@ def __init__(
         self.name = name
         self.decorators = decorators or []
         self.operation_kwargs = operation_kwargs or {}
-        self._api_viewset_class: type[APIViewSet] | None = None
+        self._api_viewset_class: Optional[type[APIViewSet]] = None
 
-    def add_view_to(self, api_or_router: ninja.NinjaAPI | ninja.Router) -> None:
+    def add_view_to(self, api_or_router: Union[ninja.NinjaAPI, ninja.Router]) -> None:
         """
         Add the view to an API or router. This method is here for convenience and
         allows you to add the view to an API or router without having to manually
@@ -328,7 +328,7 @@ def sync_handler(*args: Any, **kwargs: Any) -> Any:
         return standalone_handler
 
     @property
-    def api_viewset_class(self) -> type["APIViewSet"] | None:
+    def api_viewset_class(self) -> Optional[type["APIViewSet"]]:
         return self._api_viewset_class
 
     @api_viewset_class.setter
@@ -342,7 +342,7 @@ def api_viewset_class(self, api_viewset_class: type["APIViewSet"]) -> None:
 
     def resolve_path_parameters(
         self, model: type[django.db.models.Model]
-    ) -> type[pydantic.BaseModel] | None:
+    ) -> Optional[type[pydantic.BaseModel]]:
         """
         Resolve path parameters to a pydantic model based on the view's path and model.
 

src/ninja_crud/views/create_view.py

@@ -1,5 +1,5 @@
 from types import FunctionType
-from typing import Annotated, Any, Callable, cast
+from typing import Annotated, Any, Callable, Optional, Union, cast
 
 from django.db.models import ManyToManyField, Model
 from django.http import HttpRequest
@@ -86,19 +86,19 @@ class DepartmentViewSet(viewsets.APIViewSet):
 
     def __init__(
         self,
-        name: str | None = None,
-        methods: list[str] | set[str] | None = None,
+        name: Optional[str] = None,
+        methods: Union[list[str], set[str], None] = None,
         path: str = "/",
         response_status: int = 201,
         response_body: Any = None,
-        model: type[Model] | None = None,
-        path_parameters: type[BaseModel] | None = None,
-        request_body: type[BaseModel] | None = None,
-        init_model: ModelGetter | None = None,
-        pre_save: ModelHook | None = None,
-        post_save: ModelHook | None = None,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        model: Optional[type[Model]] = None,
+        path_parameters: Optional[type[BaseModel]] = None,
+        request_body: Optional[type[BaseModel]] = None,
+        init_model: Optional[ModelGetter] = None,
+        pre_save: Optional[ModelHook] = None,
+        post_save: Optional[ModelHook] = None,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         super().__init__(
             name=name,
@@ -120,7 +120,7 @@ def __init__(
     def handler(
         self,
         request: HttpRequest,
-        path_parameters: BaseModel | None,
+        path_parameters: Optional[BaseModel],
         request_body: BaseModel,
     ) -> Model:
         instance = self.init_model(request, path_parameters)
@@ -152,7 +152,7 @@ def _update_handler_annotations(
         return handler
 
     def _default_init_model(
-        self, request: HttpRequest, path_parameters: BaseModel | None
+        self, request: HttpRequest, path_parameters: Optional[BaseModel]
     ) -> Model:
         return cast(type[Model], self.model)()
 

src/ninja_crud/views/delete_view.py

@@ -1,5 +1,5 @@
 from types import FunctionType
-from typing import Annotated, Any, Callable, cast
+from typing import Annotated, Any, Callable, Optional, Union, cast
 
 from django.db.models import Model
 from django.http import HttpRequest
@@ -35,7 +35,7 @@ class DeleteView(APIView):
             instance. Default uses path parameters (e.g., `self.model.objects.get(id=path_parameters.id)`
             for `/{id}` path). Useful for customizing model retrieval logic.
             Should have the signature:
-            - `(request: HttpRequest, path_parameters: BaseModel | None) -> Model`
+            - `(request: HttpRequest, path_parameters: Optional[BaseModel]) -> Model`
         pre_delete ((HttpRequest, Model) -> None, optional): A callable to perform
             pre-delete operations on the model instance. Does nothing by default.
             Useful for additional operations before deleting the instance.
@@ -73,18 +73,18 @@ class DepartmentViewSet(viewsets.APIViewSet):
 
     def __init__(
         self,
-        name: str | None = None,
-        methods: list[str] | set[str] | None = None,
+        name: Optional[str] = None,
+        methods: Union[list[str], set[str], None] = None,
         path: str = "/{id}",
         response_status: int = 204,
         response_body: Any = None,
-        model: type[Model] | None = None,
-        path_parameters: type[BaseModel] | None = None,
-        get_model: ModelGetter | None = None,
-        pre_delete: ModelHook | None = None,
-        post_delete: ModelHook | None = None,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        model: Optional[type[Model]] = None,
+        path_parameters: Optional[type[BaseModel]] = None,
+        get_model: Optional[ModelGetter] = None,
+        pre_delete: Optional[ModelHook] = None,
+        post_delete: Optional[ModelHook] = None,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         super().__init__(
             name=name,
@@ -105,7 +105,7 @@ def __init__(
     def handler(
         self,
         request: HttpRequest,
-        path_parameters: BaseModel | None,
+        path_parameters: Optional[BaseModel],
     ) -> None:
         instance = self.get_model(request, path_parameters)
         self.pre_delete(request, instance)
@@ -122,7 +122,7 @@ def _update_handler_annotations(
         return handler
 
     def _default_get_model(
-        self, request: HttpRequest, path_parameters: BaseModel | None
+        self, request: HttpRequest, path_parameters: Optional[BaseModel]
     ) -> Model:
         return cast(type[Model], self.model).objects.get(
             **(path_parameters.model_dump() if path_parameters else {})

src/ninja_crud/views/list_view.py

@@ -1,5 +1,5 @@
 from types import FunctionType
-from typing import Annotated, Any, Callable, cast
+from typing import Annotated, Any, Callable, Optional, Union, cast
 
 from django.db.models import Model, QuerySet
 from django.http import HttpRequest
@@ -38,7 +38,7 @@ class ListView(APIView):
         get_queryset (Callable | None, optional): Callable to retrieve the queryset.
             Default uses `self.model.objects.get_queryset()`. Useful for selecting
             related models or optimizing queries. Should have the signature:
-            - `(request: HttpRequest, path_parameters: BaseModel | None) -> QuerySet`
+            - `(request: HttpRequest, path_parameters: Optional[BaseModel]) -> QuerySet`
         filter_queryset (Callable | None, optional): Callable to filter the queryset.
             Default uses `query_parameters.filter(queryset)` if `query_parameters` is a
             `ninja.FilterSchema`, otherwise filters the queryset based on the query
@@ -86,19 +86,19 @@ class DepartmentViewSet(viewsets.APIViewSet):
 
     def __init__(
         self,
-        name: str | None = None,
-        methods: list[str] | set[str] | None = None,
+        name: Optional[str] = None,
+        methods: Union[list[str], set[str], None] = None,
         path: str = "/",
         response_status: int = 200,
         response_body: Any = None,
-        model: type[Model] | None = None,
-        path_parameters: type[BaseModel] | None = None,
-        query_parameters: type[BaseModel] | None = None,
-        get_queryset: QuerySetGetter | None = None,
-        filter_queryset: QuerySetFilter | None = None,
-        pagination_class: type[PaginationBase] | None = LimitOffsetPagination,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        model: Optional[type[Model]] = None,
+        path_parameters: Optional[type[BaseModel]] = None,
+        query_parameters: Optional[type[BaseModel]] = None,
+        get_queryset: Optional[QuerySetGetter] = None,
+        filter_queryset: Optional[QuerySetFilter] = None,
+        pagination_class: Optional[type[PaginationBase]] = LimitOffsetPagination,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         super().__init__(
             name=name,
@@ -122,8 +122,8 @@ def __init__(
     def handler(
         self,
         request: HttpRequest,
-        path_parameters: BaseModel | None,
-        query_parameters: BaseModel | None,
+        path_parameters: Optional[BaseModel],
+        query_parameters: Optional[BaseModel],
     ) -> QuerySet[Model]:
         queryset = self.get_queryset(request, path_parameters)
         return self.filter_queryset(queryset, query_parameters)
@@ -141,12 +141,12 @@ def _update_handler_annotations(
         return handler
 
     def _default_get_queryset(
-        self, request: HttpRequest, path_parameters: BaseModel | None
+        self, request: HttpRequest, path_parameters: Optional[BaseModel]
     ) -> QuerySet[Model]:
         return cast(type[Model], self.model).objects.get_queryset()
 
     def _default_filter_queryset(
-        self, queryset: QuerySet[Model], query_parameters: BaseModel | None
+        self, queryset: QuerySet[Model], query_parameters: Optional[BaseModel]
     ) -> QuerySet[Model]:
         if isinstance(query_parameters, FilterSchema):
             queryset = query_parameters.filter(queryset)

src/ninja_crud/views/read_view.py

@@ -1,5 +1,5 @@
 from types import FunctionType
-from typing import Annotated, Any, Callable, cast
+from typing import Annotated, Any, Callable, Optional, Union, cast
 
 from django.db.models import Model
 from django.http import HttpRequest
@@ -34,7 +34,7 @@ class ReadView(APIView):
             instance. Default uses path parameters (e.g., `self.model.objects.get(id=path_parameters.id)`
             for `/{id}` path). Useful for customizing model retrieval logic.
             Should have the signature:
-            - `(request: HttpRequest, path_parameters: BaseModel | None) -> Model`
+            - `(request: HttpRequest, path_parameters: Optional[BaseModel]) -> Model`
         decorators (list[Callable], optional): View function decorators
             (applied in reverse order). Defaults to `None`.
         operation_kwargs (dict[str, Any], optional): Additional operation
@@ -73,16 +73,16 @@ class DepartmentViewSet(viewsets.APIViewSet):
 
     def __init__(
         self,
-        name: str | None = None,
-        methods: list[str] | set[str] | None = None,
+        name: Optional[str] = None,
+        methods: Union[list[str], set[str], None] = None,
         path: str = "/{id}",
         response_status: int = 200,
         response_body: Any = None,
-        model: type[Model] | None = None,
-        path_parameters: type[BaseModel] | None = None,
-        get_model: ModelGetter | None = None,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        model: Optional[type[Model]] = None,
+        path_parameters: Optional[type[BaseModel]] = None,
+        get_model: Optional[ModelGetter] = None,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         super().__init__(
             name=name,
@@ -101,7 +101,7 @@ def __init__(
     def handler(
         self,
         request: HttpRequest,
-        path_parameters: BaseModel | None,
+        path_parameters: Optional[BaseModel],
     ) -> Model:
         return self.get_model(request, path_parameters)
 
@@ -115,7 +115,7 @@ def _update_handler_annotations(
         return handler
 
     def _default_get_model(
-        self, request: HttpRequest, path_parameters: BaseModel | None
+        self, request: HttpRequest, path_parameters: Optional[BaseModel]
     ) -> Model:
         return cast(type[Model], self.model).objects.get(
             **(path_parameters.model_dump() if path_parameters else {})

src/ninja_crud/views/update_view.py

@@ -1,5 +1,5 @@
 from types import FunctionType
-from typing import Annotated, Any, Callable, cast
+from typing import Annotated, Any, Callable, Optional, Union, cast
 
 from django.db.models import ManyToManyField, Model
 from django.http import HttpRequest
@@ -37,7 +37,7 @@ class UpdateView(APIView):
             instance. Default uses path parameters (e.g., `self.model.objects.get(id=path_parameters.id)`
             for `/{id}` path). Useful for customizing model retrieval logic.
             Should have the signature:
-            - `(request: HttpRequest, path_parameters: BaseModel | None) -> Model`
+            - `(request: HttpRequest, path_parameters: Optional[BaseModel]) -> Model`
         pre_save ((HttpRequest, Model) -> None, optional): Pre-save operations on the
             model instance. Does a [full_clean](https://docs.djangoproject.com/en/stable/ref/models/instances/#django.db.models.Model.full_clean)
             by default.
@@ -86,19 +86,19 @@ class DepartmentViewSet(viewsets.APIViewSet):
 
     def __init__(
         self,
-        name: str | None = None,
-        methods: list[str] | set[str] | None = None,
+        name: Optional[str] = None,
+        methods: Union[list[str], set[str], None] = None,
         path: str = "/{id}",
         response_status: int = 200,
         response_body: Any = None,
-        model: type[Model] | None = None,
-        path_parameters: type[BaseModel] | None = None,
-        request_body: type[BaseModel] | None = None,
-        get_model: ModelGetter | None = None,
-        pre_save: ModelHook | None = None,
-        post_save: ModelHook | None = None,
-        decorators: list[Decorator] | None = None,
-        operation_kwargs: dict[str, Any] | None = None,
+        model: Optional[type[Model]] = None,
+        path_parameters: Optional[type[BaseModel]] = None,
+        request_body: Optional[type[BaseModel]] = None,
+        get_model: Optional[ModelGetter] = None,
+        pre_save: Optional[ModelHook] = None,
+        post_save: Optional[ModelHook] = None,
+        decorators: Optional[list[Decorator]] = None,
+        operation_kwargs: Optional[dict[str, Any]] = None,
     ) -> None:
         super().__init__(
             name=name,
@@ -120,7 +120,7 @@ def __init__(
     def handler(
         self,
         request: HttpRequest,
-        path_parameters: BaseModel | None,
+        path_parameters: Optional[BaseModel],
         request_body: BaseModel,
     ) -> Model:
         instance = self.get_model(request, path_parameters)
@@ -147,7 +147,7 @@ def _update_handler_annotations(
         return handler
 
     def _default_get_model(
-        self, request: HttpRequest, path_parameters: BaseModel | None
+        self, request: HttpRequest, path_parameters: Optional[BaseModel]
     ) -> Model:
         return cast(type[Model], self.model).objects.get(
             **(path_parameters.model_dump() if path_parameters else {})