songs.ts

router.get(
    "/:id",
    asyncHandler(async (req: Request, res: Response) => {
        const db = getDb();
        const collection = db.collection<Song>("song");

        const song = await collection.findOne({
            _id: new ObjectId(req.params.id),
        });

        if (song === null) {
            res.status(404).send("Song not found");
            return;
        }

        res.status(200).json(song);
    })
);