JAVASCRIPT

how to refrence schema in my mongoose schema with populate function

Person
.findOne({ firstname: 'Aaron' })
.populate('eventsAttended') // only works if we pushed refs to person.eventsAttended
.exec(function(err, person) {
    if (err) return handleError(err);
    console.log(person);
});

how to refrence schema in my mongoose schema

aaron.eventsAttended.push(event1);
aaron.save(callback);