gistfile1.js

App.PlanbookDate = Ember.Model.extend({
  
  /**
   *  Computed Property
   * This property returns a routine. If the routine is pristine,
   * it creates a routine then adds parts from the routine template to it.
   * 
   * If the routine is not pristine, it just returns the routine.
   * 
   */
   
  routine: function(){
      if  (this.get('routineIsPristine')){
          routine = App.Routine.create({id: this.get('routineId')})
          routine.set('planbookDate', this)
          var template = App.Routine.find(this.get('routineTemplateId'))
          template.on('didLoad', function(){
            template.get('parts').forEach(function(part){
                routine.get('parts').addObject(PartModel.create(part._data))
            })
            routine.set('_dirtyAttributes', [])
          })
      } else {
          routine = App.Routine.find(this.get('routineId'))
          routine.set('planbookDate', this)
      }
      return routine
  }.property('routineId', 'isLoaded'),
  
})


App.Routine = Ember.Model.extend({
    id: Ember.attr(),
    parts: Ember.hasMany('part', {embedded: true, key: 'parts'}),
    lessons: Ember.computed.filterBy('parts', 'type', 'lesson'),
})