Ember 数据:保存关系 [英] Ember Data: Saving relationships

问题描述

我需要一次性将一个深层对象保存到服务器，但在网上找不到任何使用最新 ember 数据 (1.0.0-beta.4) 的示例.

I need to save a deep object to the server all at once and haven't been able to find any examples online that use the latest ember data (1.0.0-beta.4).

例如，对于这些模型:(jsfiddle)

For example, with these models: (jsfiddle)

App.Child = DS.Model.extend({
    name: DS.attr('string'),
    age: DS.attr('number'),
    toys: DS.hasMany('toy', {async:true, embedded:'always'}),
});
App.Toy = DS.Model.extend({
    name: DS.attr('string'),
    child: DS.belongsTo('child')
});

还有这段代码:

actions: {
    save: function(){
        var store = this.get('store'),
            child, toy;

        child = store.createRecord('child', {
            name: 'Herbert'
        });
        toy = store.createRecord('toy', {
            name: 'Kazoo'
        });

        child.set('toys', [toy]);
        child.save();
    }
}  

它只保存子对象的 JSON，而不保存任何玩具——甚至没有侧载:

It only saves the JSON for the child object but not any of the toys -- not even side loaded:

{
  child: {
    age: null
    name: "Herbert"
  }
}

我也必须手动保存玩具吗?无论如何，我可以让它将以下 JSON 发送到服务器:

Do I have to manually save the toys too? Is there anyway that I can have it send the following JSON to the server:

{
  child: {
    age: null
    name: "Herbert",
    toys: [{
        name: "Kazoo"
    }]
  }
}

或

{
  child: {
    age: null
    name: "Herbert",
    toys: [1]
  }
}

见JSFiddle:http://jsfiddle.net/jgillick/LNXyp/2/

推荐答案

我需要一个深对象，而不是一个侧载对象，所以基于 kingpin2k 的回答，我想出了这个:

I needed a deep object, instead of a side-loaded one, so based on kingpin2k's answer, I came up with this:

DS.JSONSerializer.reopen({
    serializeHasMany: function(record, json, relationship) {
        var key = relationship.key,
            property = Ember.get(record, key),
            relationshipType = DS.RelationshipChange.determineRelationshipType(record.constructor, relationship);

        if (property && relationshipType === 'manyToNone' || relationshipType === 'manyToMany' ||
            relationshipType === 'manyToOne') {

            // Add each serialized nested object
            json[key] = [];
            property.forEach(function(item, index){
                json[key].push(item.serialize());
            });
        }
    }
});

现在当你调用child.serialize()时，它会返回这个对象:

Now when you call child.serialize(), it will return this object:

{
  child: {
    name: "Herbert",
    toys: [
      {
        name: 'Kazoo'
      }
    ]
  }
}

这是我需要的.这是 jsfiddle 的运行情况:http://jsfiddle.net/jgillick/LNXyp/8/

Which is what I need. Here's the jsfiddle with it in action: http://jsfiddle.net/jgillick/LNXyp/8/

这篇关于Ember 数据:保存关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！