gistfile1.txt

/home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/lib/utils.js:419
        throw err;
              ^
TypeError: object is not a function
    at model.RsvpSchema.virtual.set.unconfirmed (/home/lvanderpool/Projects/angular-wedding/models/rsvp.js:22:2)
    at model.EventEmitter.emit (events.js:117:20)
    at handleSave (/home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/lib/model.js:129:10)
    at /home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/lib/utils.js:414:16
    at /home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/node_modules/mongodb/lib/mongodb/collection.js:347:9
    at Server.Base._callHandler (/home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/base.js:382:41)
    at /home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/server.js:472:18
    at MongoReply.parseBody (/home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/node_modules/mongodb/lib/mongodb/responses/mongo_reply.js:68:5)
    at null.<anonymous> (/home/lvanderpool/Projects/angular-wedding/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/server.js:430:20)
    at EventEmitter.emit (events.js:95:17)

rsvp.js

var mongoose = require('mongoose');

var ExtraSchema = new mongoose.Schema({
	name: String,
});

var Extra = mongoose.model('Extra', ExtraSchema);

var RsvpSchema = new mongoose.Schema({
	code: {type: String, unique: true, dropDups: true},
	name: {type: String, unique: true, dropDups: true},
	email: String,
	allowed_extras: Number,
	extras: [ExtraSchema],
	attending: {type: Boolean, default: false}
});

RsvpSchema.post('save', function(next) {
	for (i=0; i<this.allowed_extras; i++) {
		this.extras.push(Extra.create({ name: ''}))
	}
	next();
});

RsvpSchema.virtual('confirmed_extras').get(function() {
	var unconfirmed = 0;
	for (extra in this.extras) {
		if (!extra.name) {
			unconfirmed += 1
		}
	};
	return this.allowed_extras - unconfirmed
});

RsvpSchema.set('toJSON', {
	virtuals: true
});
RsvpSchema.set('toObject', {
	virtuals: true
});

module.exports = mongoose.model('RSVP', RsvpSchema);