Models.js

var mongoose = require('mongoose');
var uniqueValidator = require('mongoose-unique-validator');
var Schema = mongoose.Schema;

var LocationSchema = new mongoose.Schema({
    name: {
        type: String,
        required: true,
        unique: true
    },
    location: {
        type: [Number],
        required: true,
        index: '2d',
    },
    update_date: Date,
    rentas: [{
        type: Schema.Types.ObjectId,
        ref: 'renta'
    }]
}, {
    versionKey: false
});

var RentaSchema = new mongoose.Schema({
    cancha_id: {
        type: String,
        required: true
    },
    update_date: Date,
    duration: Number,
}, {
    versionKey: false
});

LocationSchema.plugin(uniqueValidator);
mongoose.model('cancha', LocationSchema);

LocationSchema.plugin(uniqueValidator);
mongoose.model('renta', RentaSchema);

rentas.js

var express = require('express'),
    router = express.Router(),
    mongoose = require('mongoose'), //mongo connection
    bodyParser = require('body-parser'), //parses information from POST
    methodOverride = require('method-override'); //used to manipulate POST

router.use(bodyParser.urlencoded({
    extended: true
}));
router.use(methodOverride(function(req, res) {
    if (req.body && typeof req.body === 'object' && '_method' in req.body) {
        // look in urlencoded POST bodies and delete it
        var method = req.body._method;
        delete req.body._method;
        return method;
    }
}));

router.route('/')
    //GET all canchas

.get(function(req, res, next) {
        //retrieve all canchas from Monogo
        mongoose.model('renta').find({}, function(err, rentas) {
            if (err) {
                return console.error(err);
            } else {
                //respond to both HTML and JSON. JSON responses require 'Accept: application/json;' in the Request Header
                res.format({
                    //HTML response will render the index.jade file in the views/canchas folder. We are also setting "canchas" to be an accessible variable in our jade view
                    // html: function(){
                    //     res.render('canchas/index', {
                    //           title: 'Canchas List',
                    //           "canchas" : canchas
                    //       });
                    // },
                    //JSON response will show all blobs in JSON format
                    JSON: function() {
                        console.log("CANCHAS");
                        res.json(rentas);
                    }
                });
            }
        });
    })
    //POST a new blob
    .post(function(req, res) {
        console.log("POSTing new Renta");
        // Get values from POST request. These can be done through forms or REST calls. These rely on the "name" attributes for forms
        var cancha_id = req.body.cancha_id;
        var datetime = Date.now();
        var duration = req.body.duration;
        console.log("CANCHAID");
        console.log(cancha_id);
        //call the create function for our database
        mongoose.model('renta').create({
            cancha_id: cancha_id,
            updated_date: datetime,
            duration: duration
        }, function(err, renta) {
            if (err) {
                console.log(err);
                res.send("There was a problem adding the information to the database.");
            } else {
                //Cancha has been created
                console.log('POST creating new renta: ' + renta);
                mongoose.model('cancha').findByIdAndUpdate(cancha_id, function(err, cancha) {
                    if (err) {
                        console.log(err);
                        res.send("There was a problem adding the information to the database.");
                    } else {
                        console.log(cancha.rentas);
                        console.log(renta.id);
                        cancha.rentas.addToSet(renta.id);
                    }
                });

                res.format({
                    //HTML response will set the location and redirect back to the home page.
                    html: function() {
                        // If it worked, set the header so the address bar doesn't still say /adduser
                        res.location("/api/canchas/");
                        // And forward to success page
                        res.redirect("/api/canchas/");
                    },
                    //JSON response will show the newly created blob
                    json: function() {
                        res.json(renta);
                    }
                });
            }
        });
    });
/* GET New cancha page. */
router.get('/new', function(req, res) {
    mongoose.model('cancha').find({}, function(err, canchas) {
        res.render('rentas/new', {
            title: "Create new Cancha",
            canchas: canchas
        });
    });
});
module.exports = router;