old_contents: var orm = require('orm');
  
  var connectionString;
  
  if (process.env.SQLITE == 'true')
      connectionString = 'sqlite://' + __dirname + '/db.sqlite';
  else
      connectionString = 'postgres://cote:ohgath2ig8eoP8@pg/cote';
  
  var db = orm.connect(connectionString, function onConnect(err) {
      if (err) {
          console.log('Error', err);
          process.exit();
      }
  });
  
  db.settings.set('instance.cache', false);
  
  var Product = db.define('product', {
      name: String,
      price: Number,
      stock: Number
  });
  
  var Purchase = db.define('purchase', {});
  
  var User = db.define('user', {
      balance: { type: 'number', defaultValue: 30 }
  });
  
  Purchase.hasOne('product', Product, {
      autoFetch: true
  });
  Purchase.hasOne('owner', User, {
      autoFetch: true,
      reverse: 'purchases'
  });
  
  function init(callback) {
      console.log('Dropping db.');
  
      db.drop(function() {
          console.log('Initializing db.');
  
          db.sync(callback);
      });
  }
  
  module.exports = {
      Product: Product,
      Purchase: Purchase,
      User: User,
      init: init
  };
  
new_contents: var orm = require('orm');
  
  var connectionString;
  
  if (process.env.SQLITE == 'true')
      connectionString = 'sqlite://' + __dirname + '/db.sqlite';
  else
      connectionString = 'postgres://cote:ohgath2ig8eoP8@pg/cote';
  
  var db = orm.connect(connectionString, function onConnect(err) {
      if (err) {
          console.log('Error', err);
          process.exit(1);
      }
  });
  
  db.settings.set('instance.cache', false);
  
  var Product = db.define('product', {
      name: String,
      price: Number,
      stock: Number
  });
  
  var Purchase = db.define('purchase', {});
  
  var User = db.define('user', {
      balance: { type: 'number', defaultValue: 30 }
  });
  
  Purchase.hasOne('product', Product, {
      autoFetch: true
  });
  Purchase.hasOne('owner', User, {
      autoFetch: true,
      reverse: 'purchases'
  });
  
  function init(callback) {
      console.log('Dropping db.');
  
      db.drop(function() {
          console.log('Initializing db.');
  
          db.sync(callback);
      });
  }
  
  module.exports = {
      Product: Product,
      Purchase: Purchase,
      User: User,
      init: init
  };
  
subject: Exit with code 1 if no connection to the DB