Seperate models file for Express App + Mongooes

profile.js

var ProfileProvider = require('./profile_models').ProfileProvider;
var ProfileModel = new ProfileProvider();

exports.all_profiles = function(req, res) {
  ProfileModel.findAll(function(profiles){
    res.render('profiles', {
      profile_list: profiles
    });
  });
};

profile_models.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/name_of_database');

var Schema = mongoose.Schema,
    ObjectId = Schema.ObjectId;

/******** SCHEMA DEFINATION *********/

var ProfileSchema = new Schema({
    name: {type: String, index: true, require: true},
    birthday: Date,
    localtion: String,
    email: {type: String, require: true},
    joined_at: Date
});


/******** SCHEMA MANAGER *********/

mongoose.model('Profile', ProfileSchema);
var Profile = mongoose.model('Profile');

ProfileProvider = function() {};

// Create new
ProfileProvider.prototype.save = function(params, cb) {
	var p  = new Profile(params);
	p.save();
	cb(p);
};

// List all
ProfileProvider.prototype.findAll = function(cb) {
    Profile.find()
        .sort({name: 1, joined_at: -1})
        .exec(function(err, docs){
          cb(docs);
        });
};

exports.ProfileProvider = ProfileProvider;