Delegating Adapter Demomo

adapters.application\.js

import { inject } from '@ember/service';

const MAPPINGS = {
  'user': 'v1',
  'posts': 'json-api',
}

export class DelegatingAdapter {
	@inject store;
  
  constructor(args) { Object.assign(this, args); }
  static create(args) { return new this(args); }
  
  // you would do this for each adapter method in the MinimumAdapterInterface
  findRecord(store, schema, id, snapshot) {
    const { modelName } = schema;
    const { apiVersion } = snapshot.adapterOptions;
    
    const adapter = this.store.adapterFor(apiVersion || MAPPINGS[modelName] || DEFAULT_ADAPTER);
    return adapter.findRecord(...arguments);
  }
  
}

controllers.application\.js

import Controller from '@ember/controller';

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

services.store\.js

import Store from '@ember-data/store';

const MAPPINGS = {
  'user': 'v1',
  'post': 'v2',
}

export default class CustomStore extends Store {
	adapterFor(type) {
    return super.adpaterFor(MAPPINGS[type] || type);
  }
}

templates.application\.hbs

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

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-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}