models.js

var mongoose = require('mongoose');

var pollsSchema = new mongoose.Schema({
    question: String,
    responses: [{
        responseText: String,
        votes: {
            type: Number,
            default: 0
        },
        updated_at: {
            type: Date,
            default: Date.now
        }

    }]
});

module.exports = mongoose.model('Polls', pollsSchema);