Working version of a cascading delete in a Loopback model definition

gistfile1.js

module.exports = function (Category) {

  Category.observe('before delete', function (ctx, next) {

    var Product = ctx.Model.app.models.Product;

    Product.find({
      where: {
        categoryId: ctx.where.id
      }
    }, function (err, res) {
      res.forEach(function (product) {
        Product.destroyById(product.id, function () {
          console.log("Deleted product", product.id);
        });
      });
    });

    next();
  });

};