ember -将两个模型的数据组合到单个结果中，以进行幂排序

// app/models/user.js
import Model, { attr, hasMany } from '@ember-data/model';

export default class UserModel extends Model {
  @attr('string') name;
  @hasMany('post') posts;
}

// app/models/post.js
import Model, { attr, belongsTo } from '@ember-data/model';

export default class PostModel extends Model {
  @attr('string') title;
  @belongsTo('user') user;
}

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

export default class IndexRoute extends Route {
  @service store;

  async model() {
    const posts = await this.store.findAll('post', { include: 'user', sort: 'user.name' });
    return posts;
  }
}