如何在QUnit中设置一个Ember Data多态模型？ [英] How do I set an Ember Data polymorphic model in QUnit?

问题描述

我使用Ember Data的 ActiveModelAdapter ，并定义了如下所示的几个模型：

I'm using Ember Data's ActiveModelAdapter on my project and defining a few models like so:

App.GiftCard = DS.Model.extend(
  destination: DS.belongsTo('destination', polymorphic: true)

  isCampaign: (->
    @get('destination.constructor') == App.Campaign
  ).property()
)

App.Destination = DS.Model.extend()

App.Campaign = DS.Model.extend()

我的礼品卡模型有一个多态关系作为目的地，其中一个类型将是一个活动。

My gift card model has a polymorphic relationship as the destination, and one of the types will be a Campaign.

这在应用程序中的所有工作，但现在我试图写一个单元测试 isCampaign 使用QUnit的行为。我不能弄清楚的是，如何创建GiftCard记录并将Campaign指定为多态目的地？

This is all working as expected in the application, but now I'm trying to write a unit test for the isCampaign behavior using QUnit. The part I can't figure out is how can I create a GiftCard record and assign a Campaign as the polymorphic destination?

我尝试了几种不同的方法。第一个是创建广告系列记录并将其分配到目标媒体资源：

I have tried a few different ways. The first was to create a campaign record and assign it to the destination property:

campaign = @store.createRecord('campaign', id: 1)
@gift_card = @store.createRecord('gift_card',
  id: 1
  amount: 100.00
  destination: campaign
)

但是会出现错误： / p>

But that gives the error:

声明失败：您只能为此关系添加目标记录

Assertion Failed: You can only add a 'destination' record to this relationship

我尝试的另一件事只是创建一个目标记录，并指定类型：

The other thing I tried was just to create a destination record instead and specify the type:

campaign = @store.createRecord('destination', id: 1, type: 'campaign')

@gift_card = @store.createRecord('gift_card',
  id: 1
  amount: 100.00
  destination: campaign
)

但在这种情况下， destination.constructor 是 App.Destination

But in that case, destination.constructor is App.Destination, which is not what I want.

其他信息

我的设置关系的API看起来像这样：

For what it's worth, the JSON from my API that sets up the relationship looks like this:

{
  "gift_card":{
    "id":1,
    "amount":100.0,
    "destination":{
      "type":"campaign",
      "id":5
    },
    "created_at":"2013-12-10T01:17:30.373Z"
  }
}

推荐答案

我可以通过将 createRecord 更改为 push 并指定目标为ID，并将destinationType作为模型：

I was able to get this to work by changing createRecord to push and specifying the destination as the ID, and the destinationType as the model:

@store.createRecord('campaign', id: 1)

@gift_card = @store.push('gift_card',
  id: 1,
  amount: 100.00,
  destination: 1,
  destinationType: 'campaign'
)

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