填充了对象的外键

Question

我想使用骨干关系在两个模型User和Task之间建立关系.

两种模型之间的关系如下:

taskModel.creator_id = userModel.id   

---

// TaskModel
var TaskModel = Backbone.RelationalModel.extend({

    relations: [
        {
            type: Backbone.HasOne,
            key: 'creator',
            keySource: 'creator_id',
            relatedModel: Users
        }
    ],

    // some code
});

---

// Task collection
var TaskCollection = Backbone.Collection.extend({

    model: TaskModel,

    // some code

});

---

// User Model
var User = Backbone.RelationalModel.extend({
    // some code
});

---

其实问题出在collection.models上,请看附图:

请检查这个jsfiddle:http://jsfiddle.net/2bsE9/5/

var user = new User(),
    task = new Task(),
    tasks = new Tasks();

task.fetch();
user.fetch();
tasks.fetch();

console.log(user.attributes, task.attributes, tasks.models);

PS:

实际上我使用requireJs来获取UserModel,所以我不能在relatedModel值中包含引号.

define([
    'models/user',
    'backbone',
    'relationalModel'
], function (User) {
    "use strict";

    var Task = Backbone.RelationalModel.extend({
        relations: [
            {
                type: Backbone.HasOne,
                key: 'creator',
                keySource: 'creator_id',
                relatedModel: User
            }
        ],
    });
);

Answer 1

编辑2：

http://jsfiddle.net/2bsE9/13/

我更新了 jsfiddle 以反映我在下面建议的更改。只要您在任务中调用 toJSON，到达服务器的就是一个 json 对象，其属性设置为用户的creator_id实际属性。id这里keyDestination是多余的，因为文档指出如果您使用 则它会自动设置keySource。

编辑：

https://github.com/PaulUithol/Backbone-relational#keysource

https://github.com/PaulUithol/Backbone-relational#keydestination

https://github.com/PaulUithol/Backbone-relational#includeinjson

以上三者的结合可能会解决您的问题。

var Task = Backbone.RelationalModel.extend({
    relations: [
        {
            type: Backbone.HasOne,
            // The User object can be accessed under the property 'creator'
            key: 'creator',
            // The User object will be fetched using the value supplied under the property 'creator_id'
            keySource: 'creator_id',
            // The User object will be serialized to the property 'creator_id'
            keyDestination: 'creator_id',
            // Only the '_id' property of the User object will be serialized
            includeInJSON: Backbone.Model.prototype.idAttribute,


            relatedModel: User
        }
    ],
});

该文档还指出您的代码指定的属性keySource或keyDestination不应使用该属性。该属性不能作为属性来访问。

请尝试此操作并评论是否可以解决您的问题。

顺便说一句，这是一篇很好的博客文章，它使用了骨干关系端到端。 http://antoviaque.org/docs/tutorials/backbone-relational-tutorial/