使用Ember数据保存嵌套模型 [英] Save nested models using Ember Data

问题描述

我在Ember中有两个模型：

I have two models in Ember:

收藏

export default DS.Model.extend({
    name: DS.attr(),
    description: DS.attr(),
    items: DS.hasMany('collection-item')

});

收集项

export default DS.Model.extend({
    date: DS.attr(),
    volume: DS.attr(),
    sequenceNumber: DS.attr()
});

我想将集合项保存在集合的'items'属性内，例如MongoDB：

I want to save the collection items inside the 'items' attribute of the collection, like MongoDB:

[{
    "name": "First Collection",
    "description": "This is my first collection",
    "items": [
        {
            "date": "2017-07-26",
            "volume": "1",
            "sequenceNumber": "1"
        },
        {
            "date": "2017-07-27",
            "volume": "1",
            "sequenceNumber": "2"
        }
    ]
},
{
    "name": "Second Collection",
    "description": "This is my second collection",
    "items": [
        {
            "date": "2017-07-26",
            "volume": "1",
            "sequenceNumber": "1"
        },
        {
            "date": "2017-07-27",
            "volume": "1",
            "sequenceNumber": "2"
        }
    ]
}]

我读过一些有关序列化程序的文章，但我不明白这一点；）有人可以给我一个提示吗？

I have read something about serializers, but I don't get the point ;) Can someone give me a hint?

顺便说一句，我现在正在使用Firebase（emberfire），但将来我将构建自己的API。

BTW, I'm using Firebase (emberfire) for now, but I'm going to build my own API in future.

推荐答案

您所描述的内容在Ember中被称为嵌入式记录。在序列化程序页面上，在JSONAPISerializer讨论的下面是嵌入式记录混合的讨论： https://guides.emberjs.com/v2.14.0/models/customizing-serializers/

What you're describing is known as an embedded record in Ember. On the serializers page, beneath the discussion of the JSONAPISerializer is a discussion of the embedded record mixin: https://guides.emberjs.com/v2.14.0/models/customizing-serializers/

您可以将RESTSerializer与嵌入式mixin实现您的追求。

You can use a RESTSerializer with an embedded mixin to achieve what you're after.

也就是说，除非您的后端需求非常简单，否则建议您在构建后端之前就开始构建后端（并使用JSON-API）。 JSON-API是基于整个Ember社区多年来感受到的痛点的规范。如果您现在构建一个简单的后端，那么将来可能会感到头疼，因为JSON-API是专门为解决这一问题而设计的。

That said, unless your backend needs are fairly simple, I'd suggest beginning to build a backend (and using JSON-API for it) before you get too far. JSON-API is a spec based off of pain points the entire Ember community has felt over the years. If you build a simpler backend right now, you may find yourself hitting headaches in the future that JSON-API is specifically designed to address.

祝你好运！

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