Help typing for CustomizedPage

[vunhatchuong]

PageOptionalParams =  CustomizedPage[Page, UseOptionalParams()]
@router.get(
    "/",
    dependencies=[Depends(pagination_ctx(PageOptionalParams[UserResponse]))])
async def get_all(db: AsyncSession = Depends(get_db) -> ResponseBase[PageOptionalParams[UserResponse]]:

    err, users = await user_crud.get_all(db)

    return create_response(error=err, data=users)

Error:

• Pyright: Type "Page[Unknown]" is already specialized (reportInvalidTypeArguments) on line dependencies
• Mypy: Variable "routers.user.PageOptionalParams" is not valid as a type on return type hint
• Pyright: Type "Page[Unknown]" is already specialized (reportInvalidTypeArguments) on return type hint

[uriyyo]

For mypy fix should be:

T = TypeVar("T")
PageOptionalParams: TypeAlias = CustomizedPage[Page[T], UseOptionalParams()]

@router.get(
    "/",
    dependencies=[Depends(pagination_ctx(PageOptionalParams[UserResponse]))])
async def get_all(db: AsyncSession = Depends(get_db) -> ResponseBase[PageOptionalParams[UserResponse]]:

    err, users = await user_crud.get_all(db)

    return create_response(error=err, data=users)

[vunhatchuong]

Still some error with this

• Invalid type alias: expression is not a valid type on line PageOptional Params: TypeAlias while using typing.TypeAlias
• Argument of type "PageOptionalParams[UserResponse]" cannot be assigned to parameter "page" of type "type[AbstractPage[Any]] | None" in function "pagination_ctx" Pyright (reportArgumentType)
  │   Type "type[Annotated]" is incompatible with type "type[AbstractPage[Any]] | None"
  │     Type "type[Annotated]" is incompatible with type "type[AbstractPage[Any]]"
  │     "type[type]" is incompatible with "type[None]" on line dependencies

[uriyyo]

I guess it's pyright issue, I will take a look