gistfile1.coffee

#Model
Diets.FoodNutrient = DS.Model.extend
  amount: DS.attr 'string'
  name: DS.attr 'string'
  nutrient_id: DS.attr 'string'

Diets.Food = DS.Model.extend
  brand: DS.attr 'string'
  food_nutrients: DS.hasMany( Diets.FoodNutrient )

DS.RESTAdapter.map( Diets.Food, {
  food_nutrients: { embedded: 'always' }
})

#Controller to create new related record

addNutrient: (model) ->
  @get('selection.food_nutrients').createRecord { name: 'my name' }

#Data - Removed some properties above to keep things short.
{"food":{"brand":"Fage 1","name":"Total 2% Greek Strained Yogurt","serving_size":"227 g","additional_serving_size":"1 cup","tags":[],"updated_at":"2012-07-08T04:41:59.773Z","id":"4f9353b8c3f41c7686000001","food_nutrients":[{"name":"fat","amount":"4.5 g","nutrient_id":null,"id":"50f1e53f0a98dab25200002a"},{"name":"saturated fat","amount":"3 g","nutrient_id":null,"id":"50f1e53f0a98dab25200002b"},{"name":"cholesterol","amount":"15 mg","nutrient_id":null,"id":"50f1e53f0a98dab25200002c"},{"name":"sodium","amount":"75 mg","nutrient_id":null,"id":"50f1e53f0a98dab25200002d"},{"name":"carbohydrate","amount":"9 g","nutrient_id":null,"id":"50f1e53f0a98dab25200002e"},{"name":"sugar","amount":"9 g","nutrient_id":null,"id":"50f1e53f0a98dab25200002f"},{"name":"protein","amount":"23 g","nutrient_id":null,"id":"50f1e53f0a98dab252000030"},{"name":"vitamin a","amount":"12.000 u","nutrient_id":null,"id":"50f1e53f0a98dab252000031"},{"name":"calcium","amount":"1.250 g","nutrient_id":null,"id":"50f1e53f0a98dab252000032"}]}}