Ember data delete nested records

I have multiple shopping carts. Every cart has multiple products.

When I trie to remove a product from a cart, generated url tries to remove a product globally not just from that specific cart.

App.IndexRoute = Ember.Route.extend({
  model: function() {
    return this.store.find("cart", 2);
  },
  actions: {
    remove: function(product){
      product.deleteRecord();
      product.save();
    }
  }
});

{{#each product in model.products}}
    <div>{{product.title}} <button {{action "remove" product}}>x</button></div>
  {{/each}}

HTTP request generated is DELETE products/{id}

I would expect it to somehow include cart id in url. How to handle such situations ?

demo: http://ift.tt/1E0GQfV