Loopback Model - afterCreate hook to auto-save related models instantiated using build()

afterCreate.js

var async = require('async');

Project.afterCreate = function(done) {
  var self = this;

  function createRelation(rel, next, name) {
    self[name].create(rel, next);
  };

  objMapAsync(this.__cachedRelations, createRelation, done);
};

// for reference, this is just a helper function I created
// the map included in async only works with arrays
// this one works with objects
function objMapAsync(obj, iter, done) {
  function wrappedIter(results, key, next) {
    function interpret(err, result) {
      results[key] = result;
      next(err, results);
    };
    iter(obj[key], interpret, key);
  };
  async.reduce(Object.keys(obj), {}, wrappedIter, done);
}

Model hooks are deprecated. with the new operation hook pattern :

Project.observe('after save', function(ctx,next) {
      if (ctx.instance) {
          objMapAsync(ctx.instance.__cachedRelations, createRelation, next);
      }
      function createRelation(rel, next, name) {
          ctx.instance[name].create(rel, next);
      };
      next();
});

function objMapAsync(obj, iter, done) {
      function wrappedIter(results, key, next) {
        function interpret(err, result) {
          results[key] = result;
          next(err, results);
        };
        iter(obj[key], interpret, key);
      };
      async.reduce(Object.keys(obj), {}, wrappedIter, done);

    }