mongoose modify results code example

Example 1: 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"

Example 2: findbyid mongoose

// Find the adventure with the given `id`, or `null` if not found
await Adventure.findById(id).exec();

// using callback
Adventure.findById(id, function (err, adventure) {});

// select only the adventures name and length
await Adventure.findById(id, 'name length').exec();