Data Bug

adapters.application\.js

import JSONAPIAdapter from '@ember-data/adapter/json-api';
import HasManyQueryAdapterMixin from 'ember-data-has-many-query/mixins/rest-adapter';

export default JSONAPIAdapter.extend(HasManyQueryAdapterMixin, {
    host: 'https://api.eventyay.com',
    namespace : 'v1'
})

controllers.application\.js

import Controller from '@ember/controller';

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

models.event\.js

import Model, { attr, belongsTo, hasMany } from '@ember-data/model';
import ModelMixin from 'ember-data-has-many-query/mixins/model';

export default Model.extend(ModelMixin, {
  identifier             : attr('string', { readOnly: true }),
  name                   : attr('string'),
  description            : attr('string'),
  speakers               : hasMany('speaker')
});

models.speaker\.js

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

export default Model.extend({
  name: attr('string'),
  event: belongsTo('event')
});

routes.application\.js

import Route from '@ember/routing/route';
import { inject as service } from '@ember/service';

export default class IndexRoute extends Route {
    @service store;

    async model() {
      const event = await this.store.findRecord('event', 6);
      const sortedByName = await event.query('speakers', { sort: 'name' });
      debugger;
      const sortedById = await event.query('speakers', { sort: 'id' });
      
      return {
        sortedByName,
        sortedById
      };
    }
}

templates.application\.hbs

<h1>Speakers</h1>
<h2>Sorted by Name</h2>
{{#each @model.sortedByName as |speaker|}}
    <div>{{ speaker.name }} | {{ speaker.id }}</div>
{{/each}}
<h2>Sorted by ID</h2>
{{#each @model.sortedById as |speaker|}}
    <div>{{ speaker.name }} | {{ speaker.id }}</div>
{{/each}}
{{outlet}}

twiddle\.json

{
  "version": "0.17.0",
  "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/3.3.1/jquery.js",
    "ember": "3.17.0",
    "ember-template-compiler": "3.17.0",
    "ember-testing": "3.17.0"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "ember-data": "3.15.1",
    "ember-data-has-many-query": "0.3.0"
  }
}