Keith Composite Index Sequelize

app.js

var UserTodos = sequelize.define('UserTodos', {
	favorite: {
		type: Sequelize.BOOLEAN
	},
	UserId: {
		type: Sequelize.INTEGER,
		unique: 'compositeIndex'
	},
	TodoId: {
		type: Sequelize.INTEGER,
		unique: 'compositeIndex'
	}
});

original route
`app.post('/favorites/:id', middleware.requireAuthentication, function(req, res){
var favoriteId = parseInt(req.params.id, 10);
var body = {
favoriteId: favoriteId
};

db.favorite.create(body).then(
  function(favorite) {
    req.user.addFavorite(favorite).then(
      function() {
        return favorite.reload();
      }).then(
      function() {
        res.json(favorite.toJSON());
      });
  },
  function(e) {
    res.status(400).json(e);
  });

});`

This will fix the error adding another function to catch the error. But it gives me a database entry with the favorite id and a Null userId. I would think it should add anything.

`app.post('/favorites/:id', middleware.requireAuthentication, function(req, res){
var favoriteId = parseInt(req.params.id, 10);
var body = {
favoriteId: favoriteId
};

db.favorite.create(body).then(
  function(favorite) {
    req.user.addFavorite(favorite).then(
      function() {
        return favorite.reload();
      },
      function(e) {
        console.log(e);
      }).then(
      function() {
        res.json(favorite.toJSON());
      });
  },
  function(e) {
    res.status(400).json(e);
  });

});`