当获取骨干收集和创建XHR对象之间的关联 [英] Association between Backbone Collection and XHR object created when fetching

问题描述

有一个骨干集合，当你执行创建XHR对象之间的现有关联一个 .fetch（）就可以了？

Is there an existing association between a Backbone Collection and the XHR object created when you execute a .fetch() on it?

我愿做这样的事情：

collection = new Backbone.Collection;
xhrObj = collection.fetch();
xhrObj.parent == collection; //true

这个更大的目标是为我检查，看看是否有任何挂起 .fetch（）的一个特定集合。如果有另一种方式在骨干做到这一点，请让我知道。我想我会只存储XHR对象，并检查是否任何没有完成与该集合关联的那些的。

The larger goal is for me to check to see if there are any pending .fetch()'s for a specific collection. If there is another way to do this in Backbone, please let me know. I figured I would just store XHR objects and check if any of the ones that have not finished are associated with the collection.

推荐答案

您可以做到这一点是这样的：

You can do it like this :

var fetch = Backbone.Collection.prototype.fetch;
Backbone.Collection.prototype.fetch = function (options) {

    options = options ? _.clone(options) : {};

    var success = options.success;
    options.success = function (collection, resp, options) {
        collection.xhrObj = resp;
        if (success) success(collection, resp, options);
    };

    var error = options.error;
    options.error = function (collection, resp, options) {
        collection.xhrObj = void 0; // or whatever you want
        if (error) error(collection, resp, options);
    };

    fetch.call(this, options);
};

之后，如果取调用成功，你可以找到你的收藏中的服务器响应。

after that, if the fetch call succeeded you can find the server response in your collection.

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