Question

在我的应用中，我有BlogPost模型和User模型，它们通过名为author的关系相关联。要从我的Rails应用程序提供数据，我使用active_model_serializers定义：

class Blog::PostSerializer < ActiveModel::Serializer
  embed :ids, include: true

  attributes :id, :title, :text, :created_at, :updated_at

  has_one :author
  has_many :assets
end

当我使用Ember模型获取它时：

Admin.BlogPost = DS.Model.extend({
  author:     DS.belongsTo('User'),

  title:      DS.attr('string'),
  text:       DS.attr('string'),
  createdAt:  DS.attr('date'),
  updatedAt:  DS.attr('date')
});

有一个错误：

Uncaught Error: Assertion Failed: You looked up the 'author' relationship on a 'blog.post' with id 1 but some of the associated records were not loaded. Either make sure they are all loaded together with the parent record, or specify that the relationship is async (`DS.belongsTo({ async: true })`)

这是由我的回复引起的：

{
  'blog_posts': [
    {
      id: 1,
      author_id: 1
    },
    // …
  ],
  'authors': [
    { id: 1, /* … */ }
  ]
}

有没有办法更改'authors'以回复'users'或使用'authors'作为序列化程序中'users'的别名？

Answer 1

来自active_model_serializers 0.8说明：https://github.com/rails-api/active_model_serializers/tree/0-8-stable

您还可以为嵌入对象指定不同的根，而不是用于引用它们的键：

class PostSerializer < ActiveModel::Serializer
  embed :ids, :include => true

  attributes :id, :title, :body
  has_many :comments, :key => :comment_ids, :root => :comment_objects
end

这将生成如下所示的JSON：

{"post": {
    "id": 1,
    "title": "New post",
    "body": "A body!",
    "comment_ids": [ 1 ]
 },
 "comment_objects": [
  { "id": 1, "body": "what a dumb post" }
 ]
}

Answer 2

只需在序列化程序中定义一个名为users的方法，然后在其中返回作者即

_matchingData

如何为嵌入对象指定不同的根名称？

2 个答案: