Question

我一直在反对与Ember反序列化数据。我觉得我已经把它设置得正确，但我一直得到同样的错误。我正在尝试使用EmbeddedRecords Mixin，但它根本不适用于我。下面是我的调试数据。

DEBUG: Ember           : 1.6.1
DEBUG: Ember Data      : 1.0.0-beta.7+canary.b45e23ba
DEBUG: Handlebars      : 1.3.0
DEBUG: jQuery          : 1.10.2
DEBUG: Model Fragments : 0.2.2

这是我一直在做的简单设置。我的模型定义如下 -

App.Subject = DS.Model.extend({
  title: DS.attr('string'),
  sections: DS.hasMany('section')
});

App.Section = DS.Model.extend({
    title: DS.attr('string'),
    subject: DS.belongsTo('subject')
});

App.SubjectSerializer = DS.RESTSerializer.extend(DS.EmbeddedRecordsMixin, {
  attrs: {
    sections: { embedded: 'always' }
  }
});

以下是我发送给'show'

的JSON有效负载的格式

{
    "subject": {
        "_id":"549987b098909eef0ac2d691",
        "title":"Maths",
        "sections":[{
            "title":"Precalc",
            "_id":"549987b098909eef0ac2d693"
        }, {
            "title":"Calc",
            "_id":"549987b098909eef0ac2d692"
        }],"__v":0
    }
}

我在控制台中收到错误

 Error while processing route: subjects.show undefined is not a function TypeError: undefined is not a function
at Ember.Mixin.create.extractSingle (http://localhost:3300/js/highered.js:2043:25)
at apply (http://localhost:3300/js/highered.js:20664:27)
at superWrapper [as extractSingle] (http://localhost:3300/js/highered.js:20240:15)
at Ember.Object.extend.extractFind (http://localhost:3300/js/highered.js:4007:21)
at Ember.Object.extend.extract (http://localhost:3300/js/highered.js:3892:37)
at http://localhost:3300/js/highered.js:11864:34
at invokeCallback (http://localhost:3300/js/highered.js:23228:19)
at publish (http://localhost:3300/js/highered.js:22898:9)
at publishFulfillment (http://localhost:3300/js/highered.js:23318:7)
at http://localhost:3300/js/highered.js:28736:9

highered.js:16581 undefined is not a function TypeError: undefined is not a function
at Ember.Mixin.create.extractSingle (http://localhost:3300/js/highered.js:2043:25)
at apply (http://localhost:3300/js/highered.js:20664:27)
at superWrapper [as extractSingle] (http://localhost:3300/js/highered.js:20240:15)
at Ember.Object.extend.extractFind (http://localhost:3300/js/highered.js:4007:21)
at Ember.Object.extend.extract (http://localhost:3300/js/highered.js:3892:37)
at http://localhost:3300/js/highered.js:11864:34
at invokeCallback (http://localhost:3300/js/highered.js:23228:19)
at publish (http://localhost:3300/js/highered.js:22898:9)
at publishFulfillment (http://localhost:3300/js/highered.js:23318:7)
at http://localhost:3300/js/highered.js:28736:9

我可以告诉哪一个与this.keyForAttribute方法中的extractSingle直接相关

extractSingle: function(store, primaryType, payload, recordId, requestType) {
    var root = this.keyForAttribute(primaryType.typeKey),
        partial = payload[root];

    updatePayloadWithEmbedded(store, this, primaryType, partial, payload);

    return this._super(store, primaryType, payload, recordId, requestType);
},

虽然有一点需要注意的是，当我使用主题索引路由时，却会在extractArray中发生错误，该路径返回上面的json，但也包含数组括号。

extractArray: function(store, type, payload) {
    var root = this.keyForAttribute(type.typeKey),
        partials = payload[pluralize(root)];

    forEach(partials, function(partial) {
      updatePayloadWithEmbedded(store, this, type, partial, payload);
    }, this);

    return this._super(store, type, payload);
}

这让我觉得Ember Data无法识别格式。每次为模型定义序列化程序时都会发生这种情况，而不仅仅是在我启用嵌入式记录时。

我希望有人能够解释这一点。作为最后一点，我一直在使用Ember数据模型片段库，但是我禁用了它，但仍然遇到了这个错误，所以我不认为是这样。

Answer 1

Embedded Records mixin在测试版9之前不能与RESTSerializer一起使用。

您可以在此处查看其状态Ember-data embedded records current state?

在某些情况下，您还希望在没有其他版本的情况下更新ember或ember数据。 Ember Data cannot read property 'async' of undefined

使用带有keyForAttribute的Ember Embedded Records Mixin时出现类型错误

1 个答案: