emberData bulk creation

I have posted this question a week ago or so on stackoverflow: ember.js - emberData bulk create hasMany relationship - Stack Overflow Again in short: I want a form with an ‘Add another one’ button, so I can create and save multiple models (which in my case belong to a hasMany relationship) at once. I have tried to simply use an ArrayController, but for reasons that actually seem to make sense to me it doesn’t work. Is there any solution to this?