Car model update thing for jamesarosen

example.hbs

<h3>{{carMake}}</h3>

{{input value=model.car}}

<button {{action 'saveCar' model.car}}>Save</button>

example.js

import Ember from 'ember';
import carSaverCall from 'super/sweet/data-persistance-crap';

export default Ember.Component.extend({
  carSaved: function(car) {
    this.set('carMake', car),
  }
  
  carMake: Ember.computed('model.car', function(key, value) {
    if(arguments.length > 1) {
      this._carMake = value;
    } else {
      this._carMake = this.get('model.car');
    }
    return this._carMake = value;
  }),
  
  actions: {
    saveCar: function(car){
      carSaverCall(car).then(() => this.trigger('carSaved', car))
    }
  }
});