text: var express = require('express');
  var app = express();
  var mongoose = require('mongoose');
  
  var uristring = process.env.MONGODB_URI || process.env.mongo_url_local_dev;
  
  var User;
  var Article;
  var models;
  
  mongoose.connect(uristring);
  
  User = mongoose.model('User', require('./userSchema'), 'users');
  Article = mongoose.model('Article', require('./articleSchema'), 'article');
  models = {
    User: User,
    Article: Article
  };
  
  module.exports = models;
  