get-one.js

exports.params = async function (req, res, next, id) {
  console.log(id);
  await PostModel.findById(id)
    .populate('author')
    .exec()
    .then((post) => {
      if (!post) {
        return res.status(400).send(' post with that Particular id');
      }
      req.post = post;
      next();
    })
    .catch((err) => {
      res.send(err);
    });
};