Unfortunately, halayli's quite right here. You can, (and probably should) write the Backbone version of this in precisely the same way that Thomas does in his a

Unfortunately, halayli's quite right here. You can, (and probably should) write the Backbone version of this in precisely the same way that Thomas does in his article. There's a nice pattern here for checking ids for presence before adding new models, but nothing inherently Ember or Backbone about it.