backbone.js - Backbonejs事件发生多次

Question

我有一个在网格中显示项目的 View 。如果单击创建新行的按钮，则会显示一个 pop 窗口(使用SimpleModal)，以允许用户将行保存到服务器。如果一切顺利，则窗口将关闭并且网格将刷新。至此为止，所有工作正常。如果现在再次打开窗口，则保存记录事件将被调用两次。如果我第三次关闭并打开窗口，则该事件将被调用3次，依此类推。我不知道为什么该事件多次反弹。这是我的两种观点:

FieldList View :

var fieldListView = Backbone.View.extend({
el: "#centerbodycontent",
initialize: function () {
    _.bindAll(this, 'render', 'addField');
},

render: function () {
    $(this.el).empty();
    $("#FieldGridTemplate").tmpl({ results: this.model }).appendTo(this.el)
    stripe($(this.el).find("tbody"));
    return this;
},
events: {
    "click a#addfield": "addField"
},
addField: function (e) {
    window.appController.popup = new fieldFormView({ model: new fieldModel({ contenttype_id: this.model.id }) });
    window.appController.popup.render();
}

});

表单 View (这是 pop 窗口的名称)

var fieldFormView = Backbone.View.extend({
el: "#popupwindowcontent",

events: {
    "click #savefieldandnew": "savefield",
    "click #savefieldandclose": "savefield",
    "change input,textarea,select": "changeField"
},
render: function () {
    var formWrapper = $(this.el).find(".modal-form")[0];
    $(formWrapper).empty();
    $("#FieldFormTemplate").tmpl({ results: this.model }).appendTo(formWrapper)
    OpenForm(this.el, "Add Field", 450, 600);
    return this;
},
// automatically updates the model during field changes
changeField: function (e) {
    var changeobj = new Object;
    switch (e.target.type) {
        case "radio":
            changeobj[e.target.id] = parseInt($(e.target).val());
            break;
        case "checkbox":
            changeobj[e.target.id] = $(e.target).is(":checked");
            break;
        default:
            changeobj[e.target.id] = $(e.target).val();
            break;
    }

    if (e.target.id.toLowerCase() == "name") {
        var k = $(this.el).find("#key");
        if (jQuery.trim(k.val()).length == 0)
            k.val($(e.target).val().replace(/[^a-zA-Z0-9]+/g, '').toLowerCase());

        var l = $(this.el).find("#label");
        if (jQuery.trim(l.val()).length == 0)
            l.val($(e.target).val());
    }

    var options = { silent: true };
    this.model.set(changeobj, options);
},
savefield: function (e) {
    var kcode = (e.which);
    var thiz = this;
    var m = this.model;
    var nextaction = e.target.id;
    alert(nextaction);
    if (kcode == 0 || kcode == 1 || kcode == 32) {
        e.preventDefault();
        if ($("#contentfieldform").validate({
            rules: {
                name: { required: true },
                label: { required: true },
                key: { required: true }
            }
        }).form()) {
            m.save(null, {
                headers: { "If-Match": m.get("version") },
                error: function (model, response) {
                    var errResp = JSON.parse(response.responseText);
                    popupException("Content Type Modification Error", errResp.errors[0].message);
                },
                success: function (model, response) {
                    window.appController.popup.model = new fieldModel;
                    $.pnotify({
                        pnotify_title: 'Field Saved',
                        pnotify_text: 'The field was saved successfully.'
                    });

                    if (nextaction == "savefieldandclose") {
                        $.modal.close();
                    }
                }
            });
        }
    }
}

Answer 1

由于没有人回答，我想我会添加一些更多信息，以防有人碰到这个问题。 http://lostechies.com/derickbailey/2011/09/15/zombies-run-managing-page-transitions-in-backbone-apps/是解释正在发生的事情(并提供通用解决方案)的一个很好的资源。此外，最新版本的主干网还提供了一些新方法来允许从 View 中注销事件。