Backbone.js的调用render后，收集人口 [英] Backbone.js calling render after collection is populated

问题描述

我试图调用render获取集合后。

I'm trying to call render after fetch of a collection.

在我的初始化方法我有：

In my initialize method I have:

this.collection.bind('all', this.render, this);
this.collection.fetch();

在IE浏览器似乎有时它试图渲染，收集有数据之前。收藏似乎不具有可绑定到一个改变事件，有没有更好的方式来确保集合已呈现之前已经获取的？

In IE it seems that sometimes it tries to render, before the collection has data. Collections don't seem to have a 'change' event that can be bound to, is there a better way to ensure that the collection has been fetched before rendering?

谢谢！

编辑：

如果我刷新页面，它似乎总是工作，但如果我在地址栏再次点击和页面加载，它不会永远工作。

If I refresh the page, it seems to always work, however if I click in the address bar again and the page loads, it doesn't ever work.

推荐答案

如果你想保证渲染之前数据已被取出，那么我建议使用jQuery的延迟目标：

If you want to guarantee that data has been fetched before rendering it, then I'd suggest using jQuery's deferred object:

this.collection.deferred = this.collection.fetch();
self = this;
this.collection.deferred.done(function() {
    self.collection.render();
  }
);

基本上任何你把你传送到功能完成才会被调用的之后的取指，没错，是完成的。

Basically anything you put into the function you send to done will only be called after fetch is, well, done.

更多关于deferreds：

More on deferreds:

• http://lostechies.com/derickbailey/2012/02/07/rewriting-my-guaranteed-callbacks-$c$c-with-jquery-deferred/


• http://www.erichynds.com/jquery/using-deferreds -in-的jQuery /

• http://lostechies.com/derickbailey/2012/02/07/rewriting-my-guaranteed-callbacks-code-with-jquery-deferred/
• http://www.erichynds.com/jquery/using-deferreds-in-jquery/

这篇关于Backbone.js的调用render后，收集人口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！