New Twiddle

controllers.application\.js

import Controller from '@ember/controller';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

models.my-model\.js

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

export function translated(...attrs) {
  let translationsKey = attrs.length === 1 ? attrs[0] : `${attrs[1]}Translations`;

  console.log(translationsKey)
  
  return computed("store.locale", translationsKey, {
    get() {
      let { locale } = this.store;
      return get(this, `${translationsKey}.${locale}`);
    },

    set(_key, value) {
      let result = set(this, `${translationsKey}.${this.store.locale}`, value);
      notifyPropertyChange(this, translationsKey);
      return result;
    },
  });
}


export default class extends Model {
  @translated("titleTranslations")
  title
  
  titleTranslations = {
    en: "Hi!",
    es: "¡Hola!"
  }
}

templates.application\.hbs

<h1>Welcome to {{this.appName}}</h1>
<h1>{{this.model.title}}</h1>

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.18.1",
    "ember-data": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
  }
}