Ember Data - 保存记录丢失有很多关系

问题描述

我在使用 Ember 数据夹具适配器时遇到问题.保存记录时，所有记录的 hasMany 关联都丢失了.我创建了一个简单的 JS Bin 来说明这个问题:http://jsbin.com/aqiHUc/42/edit

I am having an issue working with Ember Data Fixture Adapter. When saving a record, all of the record's hasMany associations are lost. I have created a simple JS Bin to illustrate the issue: http://jsbin.com/aqiHUc/42/edit

如果您编辑任何用户并保存，所有项目都会消失.

If you edit any of the users and save, all the projects disappear.

这是使用 Ember 1.0.0 和 Ember Data 的最新金丝雀版本.

This is using Ember 1.0.0 and the latest canary build of Ember Data.

我不确定我是否做错了什么，或者这是否是 Ember Data 的问题.

I am not sure if I am doing something wrong or if this is an issue with Ember Data.

谢谢

推荐答案

为了回答我的问题，DS.JSONSerializer.serializeHasMany 似乎只处理和序列化 manyToNone 和 manyToMany 关系类型.您可以通过为模型使用自定义序列化程序来覆盖此行为:

To answer my question, the DS.JSONSerializer.serializeHasMany seems to only processes and serialize manyToNone and manyToMany relationship types. You can override this behaviour by using a custom serializer for the model:

var get = Ember.get;
App.UserSerializer = DS.RESTSerializer.extend({
  serializeHasMany: function(record, json, relationship) {
    var key = relationship.key;

    var relationshipType = DS.RelationshipChange.determineRelationshipType(record.constructor, relationship);

    if (relationshipType === 'manyToNone' || relationshipType === 'manyToMany' || relationshipType === 'manyToOne') {
      json[key] = get(record, key).mapBy('id');
    }
  }
});

仍然不太确定这是否是一个错误，或者这是否是期望/预期的行为.

Still not quite sure if this is a bug or if this is the desired/expected behaviour.

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