Mongo query tips

findOneOrCreate.js

// findOneOrCreate in Mongoose:
//   Return the original doc (no modification) if it can be found and create a new doc if cannot be found.
//   Without `$setOnInsert`, it will update the doc if it can be found.
Model.findOneAndUpdate(
  {name: 'Matt'},
  {$setOnInsert: {score: 60}},
  {upsert: true, new: true}
)

// Set `setDefaultsOnInsert` to true in option if need to insert with setting the default value.
// See https://mongoosejs.com/docs/defaults.html#the-setdefaultsoninsert-option