Does Mongoose support the Mongodb `findAndModify` method?

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The feature is not well (read: at all) documented, but after reading through the source code, I came up with the following solution.

Create your collection schema.

var Counters = new Schema({
  _id: String,
  next: Number     
});

Create a static method on the schema which will expose the findAndModify method of the model’s collection.

Counters.statics.findAndModify = function (query, sort, doc, options, callback) {
  return this.collection.findAndModify(query, sort, doc, options, callback);
};

Create your model.

var Counter = mongoose.model('counters', Counters);

Find and modify!

Counter.findAndModify({ _id: 'messagetransaction' }, [], { $inc: { next: 1 } }, {}, function (err, counter) {
  if (err) throw err;
  console.log('updated, counter is ' + counter.next);
});

Bonus

Counters.statics.increment = function (counter, callback) {
  return this.collection.findAndModify({ _id: counter }, [], { $inc: { next: 1 } }, callback);
};

Counter.increment('messagetransaction', callback);

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