gistfile1.js

test("modifying a hasMany record should make parent dirty", function() {
  expect(2);
  
  var Author = Ember.Model.extend({
        id: Ember.attr(),
        name: Ember.attr()
      }),
      Post = Ember.Model.extend({
        id: Ember.attr(),
        authors: Ember.hasMany(Author, {key: 'author_ids'})
      });

  Post.adapter = Ember.FixtureAdapter.create();
  Author.adapter = Ember.FixtureAdapter.create();

  var author = Author.create();
  var post = Post.create();

  author.on('didLoad', function() {
    post.get('authors');
    ok(!post.get('isDirty'));
    author.set('name', 'billy');
    ok(post.get('isDirty'));
  });

  Ember.run(post, post.load, 1, {id: 1, author_ids: [100] });
  Ember.run(author, author.load, 100, {id: 100, name: 'bob' });
});

has_many_array.js

Ember.ManyArray = Ember.RecordArray.extend({
  _records: null,

  objectAtContent: function(idx) {
    var content = get(this, 'content');

    if (!content.length) { return; }

    return this.materializeRecord(idx);
  },

  // needed for find
  nextObject: function(idx, previousObject, context) {
    return this.objectAtContent(idx);
  },

  save: function() {
    // TODO: loop over dirty records only
    return Ember.RSVP.all(this.map(function(record) {
      return record.save();
    }));
  },

  replaceContent: function(index, removed, added) {
    added = Ember.EnumerableUtils.map(added, function(record) {
      return record._reference;
    }, this);

    this._super(index, removed, added);
  },

  isDirty: Ember.computed(function() {
    return this.find(function(record) {
      return record.get('isDirty');
    });
  }).property().volatile()
});