Mongoose findOneAndUpdate Upsert _id null?

Question

I\'d like to have a single method that either creates or updates a document for a policy. Searching and trying different techniques like this one, I have come up with a nul

Answer 1

Since we can now add default properties while destructuring objects in JavaScript, in the case that we are checking to see if a document exists, I find this the easiest way to either query via an existing _id or create a new one in the same operation, avoiding the null id problem:

// someController.js using a POST route

async function someController(req, res) {
  try {
  const {
    // the default property will only be used if the _id doesn't exist
    _id: new mongoose.Types.ObjectId(),
    otherProp,
    anotherProp
  } = req.body;
  const createdOrUpdatedDoc = await SomeModel.findOneAndUpdate(
    {
      _id
    },
    {
      otherProp,
      anotherProp
    },
    {
      new: true,
      upsert: true
    }
  ).exec();
  return res.json(201).json(createdOrUpdatedDoc);
  } catch (error) {
    return res.json(400).send({
      error,
      message: "Could not do this"
    })
  }
}