节约使用Rails嵌套的对象，Backbone.js的，和accepts_nested_attributes_for [英] Saving nested objects with Rails, backbone.js, and accepts_nested_attributes_for

问题描述

我使用Rails，Backbone.js的（现在正在学习这一点）。比方说，你有两个型号，轿车和发动机。

I'm using Rails, backbone.js (learning this now). Let's say you have two models, Car and Engine.

var Car = Backbone.Model.extend({
  initialize: function() {
    if(this.get('engine') != undefined) this.engine = new Engine(this.get('engine'));
  }
}

var redCar = new Car({
      'color': 'red',
      // The controller nests the model
      'engine': {
         'horsepower': '350'
       }
    });


redCar.save()

什么是发送 engine_attributes 到控制器的正确方法？ （汽车 accepts_nested_attributes_for：发动机，所以预计 engine_attributes 。）我重写主干同步（）？有没有更好的惯例遵循嵌套模式？

What is the right way to send engine_attributes to the controller? (Car accepts_nested_attributes_for :engine, so it expects engine_attributes.) Do I override the Backbone sync()? Is there a better convention to follow for nested models?

也许我不应该从控制器返回嵌套模式，或返回 engine_attributes 而不是引擎？

Maybe I should not be returning nested models from the controller, or returning engine_attributes instead of engine?

在一个侧面说明，我使用Rails respond_with（@car，：包括=＆GT;：发动机）（等同于 @car .to_json（：包括=＆GT;：引擎）。这个API巢之下发动机发动机属性但该模型预计，这一事实 engine_attributes 似乎矛盾 - 我从来没有知道如何调和这种

On a side note, I am using the Rails respond_with(@car, :include => :engine) (same as @car.to_json(:include => :engine). The fact that this api nests the engine attributes under engine but the model expects engine_attributes seems contradictory - I've never been sure how to reconcile this.

推荐答案

我会建议覆盖的toJSON的骨干机型。

I would suggest to override toJSON on the backbone model.

toJSON: function(){

  json = {car : this.attributes};
  return _.extend(json, {engine_attributes: this.get("engine").toJSON());

}

的toJSON是同步方法中只是将数据发送到后端之前调用。

toJSON is called within the sync method just before sending data to the backend.

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