Mongoose - Node.js

schema.js

var mongoose = require('mongoose');
var assert = require('assert');

var schema = mongoose.Schema;
var tutorialSchema = new schema({
   topic:{
       type:String,
       require:true,
       unique:true   },
    description:{
        type:String,
        require:true    }
});

var Tutorials = mongoose.model('tutorials', tutorialSchema);
module.exports = Tutorials;

app.js

var mongoose = require('mongoose');
var assert = require('assert');

var Tutorials = require('./schema.js');

var url = 'mongodb://localhost:27017/MyDb';
mongoose.connect(url);

var db = mongoose.connection;

db.on('error', console.error.bind(console, 'Connection error'));
db.on('open', function () {
   console.log('Connected');
});

var NewTopic = Tutorials({
    topic : 'Express.js',
    description : 'Express Framework',
});

NewTopic.save(function (err) {
    if(err) throw err;

    Tutorials.find(function (err, data) {
        if(err) throw err;
        console.log(data);
    });
});