Serialize computed property

adapters.application.js

import DS from 'ember-data';

export default DS.JSONAPIAdapter.extend({
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  serialilized: Ember.computed('model.{name,isNamed}', function(){
    return this.get('model').serialize().data.attributes;
  }),

});

models.my-model.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  name: attr(),
  isNamed: Ember.computed.bool('name'),
  
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    return this.store.createRecord('my-model', {name: 'John'});
  }
});

serializers.my-model.js

import JSONAPISerializer from 'ember-data/serializers/json-api';

export default JSONAPISerializer.extend( {
  attrs: {
    // isNamed: { serialize: true },
  },
  
  serialize(snapshot, options) {
    var json = this._super(...arguments);

    json.data.attributes.isNamed = snapshot.record.get('isNamed');

    return json;
  },
});

templates.application.hbs

<strong>Model :</strong> <br>
Name: {{input value=model.name}} <br>
isNamed: {{model.isNamed}}<br>

<hr>

<strong>Serialized attributes :</strong><br>
{{#each-in serialilized as |key value|}}
	{{key}} : {{value}} <br>	
{{/each-in}}
<br>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}