我试图从一个API调用中侧载关系数据。我有一个我的两个模型设置如下：
竞赛模型（子项，属于）：

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

export default class ContestModel extends Model {
  @attr('date') createdAt;
  @attr('string') description;

  @belongsTo('brand', { inverse: 'contests' }) brand;
}

品牌模型（父代，hasMany）：

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

export default class BrandModel extends Model {
  @attr('date') createdAt;
  @attr('string') name;

  @hasMany('contest') contests;
}

我通过这条线获取：

this.store.findRecord('contest', params.contest_id, { include: 'brand' });

这是返回的API有效负载：

{
  "data": {
    "type": "contest",
    "id": 1,
    "attributes": {
      "body_json": [
        {
          "question": "what time is it?",
          "answers": ["1PM", "2PM", "3PM", "4PM"]
        },
        {
          "question": "which collection is this artwork from?",
          "answers": ["botanical garden collection", "ghibli collection", "adventure collection", "swag collection"]
        }
      ],
      "created_at": "2021-05-23 18:00:00 -0700",
      "description": "a good description goes here"
    },
    "relationships": {
      "brand": {
        "links": {
          "self": "http://example.com/contests/2/relationships/brand" // not sure what this does
        },
        "data": { "type": "brand", "id": 2 }
      }
    },
    "links": {
      "self": "http://example.com/contests/2" // not sure how this is useful
    },
    "included": [
      {
        "id": 2,
        "type": "brand",
        "attributes": {
          "created_at": "2021-05-23 20:00:00 -0700",
          "name": "aloha vibe"
        }
      }
    ]
  }
}

这里的问题是调用myContest.brand返回一个Proxy对象，就像在这个SO post中一样。
是我的API负载不正确，还是我的模型配置错误？还是其他什么？我在Ember 3.25.3上
从注解更新：当我将async: false添加到Ember Data查询中时，由于toReturn.isEmpty为true，我在www.example.com这一行后面收到一个错误https://github.com/emberjs/data/blob/v3.25.0/packages/store/addon/-private/system/model/internal-model.ts#L705。我是否没有配置我的API负载？不确定是什么错误。看起来createdAt和name都没有填充。