mongoose findoneandupdate
// note: this uses async/await so it assumes the whole thing
// is in an async function
const doc = await CharacterModel.findOneAndUpdate(
{ name: 'Jon Snow' },
{ title: 'King in the North' },
// If `new` isn't true, `findOneAndUpdate()` will return the
// document as it was _before_ it was updated.
{ new: true }
);
doc.title; // "King in the North"