Ember save / set

adapters.draft.js

import DS from 'ember-data';

export default DS.JSONAPIAdapter.extend({
  updateRecord(store, type, { record }) {
  	console.log("Saving draft", record.id); 
    return sleep(1000);
  },
  
  createRecord(store, type, { record }) {
  	console.log("Creating draft", record.body); 
    return sleep(1000).then(() => ({
      data: {
        type: "draft",
        id: Math.floor(Math.random()*1000),
        attributes: {
          body: record.body,
        },
      },
    }));
  },
  
  findRecord(store, type, id, snapshot) {
    console.log("Finding draft", id);
    return sleep(1000).then(() => ({
      data: {
        type: "draft",
        id: id.toString(),
        attributes: {
          body: "",
        },
      },
    }));
  },
});

async function sleep(timeout) {
	await new Promise(resolve => setTimeout(resolve, timeout));
}

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  async init() {
  	await this.exampleReloadCreate();
  },
                                       
	async exampleFindRecord() {
  	let draft = this.store
  },
                                       
	async exampleReloadCreate() {
  	let draft = this.store.createRecord('draft', {
      body: "",
    });
  
  	printModelState(draft);
    let draftSave = draft.save();
    printModelState(draft);
    await draftSave;
    printModelState(draft);
  },
                                       
	async exampleReload() {
  	let draft = this.pushDraft();
  	let draftReload = draft.reload();
  	await sleep(100);
  	draft.set('body', 'foo');
  	await draftReload;
  },
  
  async exampleSave() {
		let draft = this.pushDraft();
    let draftSave = draft.save();
		await sleep(100);
		draft.set('body', 'foo');
		await draftSave;
		console.log('draft body post-save', draft.body);
  },
    
  pushDraft() {
    this.store.push({
  		data: [{
  			type: 'draft',
        id: 1,
  			attributes: {
	        body: "",
				},	
      }]
    });

		return this.store.peekRecord('draft', 1);
  },
});

function printModelState(model) {
	console.log('Model state:', model._internalModel.currentState.stateName); 
}

async function sleep(timeout) {
	await new Promise(resolve => setTimeout(resolve, timeout));
}

models.draft.js

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

export default Model.extend({
  body: attr(),
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}