Backbone.js的 - 从集合获取ID创建 [英] Backbone.js - getting id from collection create

问题描述

我使用的是创建方法将一个模型集合，API为响应就好了。该模型似乎已经正常返回，请参阅 console.dir（RESP）; 这是我一直在寻找。然而，当我尝试访问 runningorderid ，这是 ID 与定义的 idAttribute ，响应为空。我presume这事做响应的异步性，但我不知道该如何处理它。

I am adding a model to a collection using the create method and the api is responding just fine. The model seems to have been properly returned and see the console.dir( resp ); which is what I was looking for. However, when I try to access runningorderid, which is the id as defined with idAttribute, the response is null. I presume this is something to do with the async nature of the response, but I don't know how to deal with it.

var resp = window.app.RunningOrderCollection.create(
        { runningorderid: null, listitemid: 1, starttime: n} , 
        { wait: true }
);
console.dir( resp );
console.dir( resp.get("strt") );
console.dir( resp.id );

推荐答案

collection.create ，由于涉及到服务器的请求的所有方法，的确是异步的。你的情况，你可以听同步事件得到期望的结果。

collection.create, as all methods related to server requests, is indeed asynchronous. In your case, you could listen to the sync event to get the desired result.

http://backbonejs.org/#Collection-create

创建模型将导致触发的直接添加事件
  上的收集，以及一个同步事件中，一旦模式已经
  在服务器上创建成功。

Creating a model will cause an immediate "add" event to be triggered on the collection, as well as a "sync" event, once the model has been successfully created on the server.

例如：

resp.on('sync', function(model) {
  console.dir( resp );
  console.dir( resp.get("strt") );
  console.dir( resp.id );
});

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