https://github.com/emberjs/data/issues/3704

adapters.application.js

import DS from "ember-data";

export default DS.RESTAdapter.extend();

application.route.js

import Ember from 'ember';

var server = new Pretender(function() {
  this.get("/myModels/1", function() {
    return [200, {}, JSON.stringify({
      "my-model": {
        id: 1,
        description: "reloaded"
      }
    })];
  });
});

export default Ember.Route.extend({
  beforeModel() {
    this.store.push({
      data: {
        type: 'my-model',
        id: 1,
        attributes: {
          description: "loaded"
        }
      }
    });
  },
  
  model() {
    return this.store.findRecord('my-model', 1, { reload: true });
  }
});

application.template.hbs

{{model.id}} {{model.description}}

models.my-model.js

import DS from 'ember-data';

export default DS.Model.extend({
  description: DS.attr()
});

twiddle.json

{
  "version": "0.5.3",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "1.13.13",
    "ember-data": "1.13.15",
    "ember-template-compiler": "1.13.13",
    "route-recognizer": "https://rawgit.com/tildeio/route-recognizer/56f5fcec6ae58d8e86b5dc77609809fb91198142/dist/route-recognizer.js",
    "FakeXMLHttpRequest": "https://rawgit.com/pretenderjs/FakeXMLHttpRequest/23c3a96b5b24f1bfe595867437e4f128a29c2840/fake_xml_http_request.js",
    "pretender": "https://rawgit.com/pretenderjs/pretender/c6de9afe18b1472aded2592f5a80ad9a26a0e262/pretender.js"
  }
}