使用jQuery的when __each多个ajax调用上的回调

Question

I saw some examples on wrapping ajax calls with jquery's when function. As I'm just getting started with JS, I'm unsure on how to do this with a _.each. All the examples were cases where they just created an array and wrapped it in jquery's when. Right now, the code basically goes:

_.each(this.models, function (model) {
                model.fetch({
                    success: function (model, response) {
                        // do something                    },

How can I wrap this with jquery's when to get a callback when everything is finished? Thanks!

Answer 1

var requests = _.map(this.models, function (model) {
        return model.fetch({
            success: function (model, response) {
            }
        });
});

//Working around the fact that array is not accepted
$.when.apply($, requests).then(function(){

});