gistfile1.js

var mongoose = require('mongoose');
var _ = require('underscore');
var models = {}
var Schema = mongoose.Schema, ObjectId = Schema.ObjectId;

var TimestampProperties = {
    created_at  : Date,
    updated_at  : Date
}

var UserProperties = {
    email       : String,
    name        : String
}

var ContentProperties = {
    title        : String,
    start_time   : Date,
    end_time     : Date,
    published    : Boolean,
    _author      : { type: ObjectId, ref: 'User' }
}

_.extend(UserProperties, TimestampProperties);
_.extend(ContentProperties, TimestampProperties);

models.User = new Schema(UserProperties);
models.Content = new Schema(ContentProperties);

exports.User = models.User;
exports.Content = models.Content;