Mongoose deleting (pull) a document within an array, does not work with ObjectID

Question

I have the following mongoose schema:

user = {
    \"userId\" : \"myId\",
    \"connections\":
    [{
        \"dateConnectedUnix\": 1334567891,
        \"is         


        

Answer 1

In mongoose 5.8.11, this $pull: { ... } didn't work for me, so far not sure why. So I overcame it in my controller this way:

exports.removePost = async (req, res, next) => {
  const postId = req.params.postId;
  try {
    const foundPost = await Post.findById(postId);
    const foundUser = await User.findById(req.userId);
    if (!foundPost || !foundUser) {
      const err = new Error(
        'Could not find post / user.',
      );
      err.statusCode = 404;
      throw err;
    }
    // delete post from posts collection:
    await Post.findByIdAndRemove(postId);
    // also delete that post from posts array of id's in user's collection:
    foundUser.posts.pull({ _id: postId });
    await foundUser.save();
    res.status(200).json({ message: 'Deleted post.' });
  } catch (err) {
    // ...
  }
};