Javascript 木偶事件，从子事件到父事件的异步回调？

我有一个索引视图，它调用集合，从而调用项视图。用户可以勾选项目，然后单击“在索引模板中复制”

下面的代码工作正常，该项在索引中触发了一个事件。然而，问题是，我想知道所有事件何时完成了对这些帖子的复制。我能想到的唯一方法是将复制逻辑移动到索引视图中，但我确实认为这是一个项目视图操作

posts/index.js

// copy posts from the collection
        onClickCopyPosts: function() {
            // are we sure we want to delete these posts
            var platform = $('#copyPlatforms option:selected').val();
            if (confirm('Are you sure you want to copy these posts to that platform?')) {
                // get the post ids of the ticked posts
                var postIds = this.getSelectedPostsArray();
                _.each (postIds, function (postId, key) {
                    MyApp.vent.trigger('post:copy:'+postId, platform);
                })
            }
        },

item.js

    initialize: function () {

        var that = this;

        this.listenTo(MyApp.vent, 'post:copy:'+this.model.get('id'), function(platform) {
            // fetch the collection and pass its filters through
            that.onCopy(platform);
        });
    },

       onCopy: function(platform) {

            // copy the current model to a new variable
            var modelJSON = this.model.toJSON();

            // set platform to the platform passed to the method
            modelJSON.platform = platform;

            modelJSON = Factory.create(modelJSON);

            // create a new instance of that model
            var newModel = new Model(modelJSON);

            // save the new model
            newModel.save({}, {
                success: function() {
                    //console.log('copy post', 'success');
                },
                error: function() {
                    //console.log('copy post', 'error');
                },
                complete: function() {
                    //console.log('copy post', 'complete');
                }
            });
            return;
        },

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我认为您应该重新设计它来保存一组模型，而不是每次保存都触发一个事件。通过这种方式，您可以听到一组XHR使用Jquerys在完成所有操作后发出回调

请参阅，he允许任意数量的可同步主干实体在：获取时触发

“

事件，但可用于保存模型。很好