24.02.15

router.post("/post/:postId/favorites", authMiddleware, async (req, res) => {
 
    const { postId } = req.params;
    const { userId } = req.user;
    try {
        const existingLike = await prisma.favorites.findFirst({
            where: {
              postId: +postId,
              userId: userId,
            },
        })
        if (!existingLike) {
            return res
            .status(400)
            . json({ errorMessage: "이미 좋아요 했습니다.!!" });
    }
    
const favoritesPosts = await prisma.$transaction([
    prisma.favorites.create({
    data: {
            postId: +postId,
            userId: userId,
            },
        }),
        prisma.posts.update({
            where: { postId: +postId },
            data: { fav_cnt: { increment: 1 } },
        }),
  ]);   
  return res.status(201).json({ message: "팔로우 성공", favoritesPosts });
  } catch (err) {
    next(err);
  }
});