extra.txt

var mongoskin = require('mongoskin'),
dbHost = '127.0.0.1',
dbPort = 27017;
var db = mongoskin.db(dbHost + ':' + dbPort + '/local', {safe:true});

db.bind('messages', {
  findOneAndAddText : function (text, fn) {
    db.collection('messages').findOne({}, function(error, item){
	  if (error) {
	    console.error(error);
		process.exit(1);
 	  }
	  console.info('findOne: ', item);
	  item.text = text;
	  var id = item._id.toString(); // we can store ID in a string
	  console.info('before saving: ', item);
	  db.collection('messages').save(item, function(error, count){
	    console.info('save: ', count);
	    return fn(count, id);
      });
    })
  }
});

db.collection('messages').findOneAndAddText('hi', function(count, id){
  db.collection('messages').find({
    _id: db.collection('messages').id(id)
  }).toArray(function(error, items){
	console.info("find: ", items);
	db.close();
	process.exit(0);
  });
});