javascript - 保存模型时更新主干 View

Question

我有以下场景-

window.Wine = Backbone.Model.extend({
  urlRoot: '/wines'

});
window.WineCollection = Backbone.Collection.extend({
   model: Wine,
   url: "/wines"
});

我有一个模型和定义的相应集合。

window.WineListView = Backbone.View.extend({
    el: '#wineList',
    initialize: function () {
        this.model.bind("reset", this.render, this);
        this.model.bind("add", function (wine) {
            alert("model added");
        });
    },
    render: function (eventName) {
        _.each(this.model.models, function (wine) {
            $(this.el).append(new WineListItemView({
                model: wine
            }).render().el);
        }, this);
        return this;
    }
});
window.WineListItemView = Backbone.View.extend({
    tagName: "li",
    initiliaze: function () {
        this.render();
    },
    render: function (eventName) {
        var template = _.template($('#wine-list-item').html());
        $(this.el).html(template(this.model.toJSON()));
        return this;
    }
});

以上 View 为每个模型创建了一个单独的列表项。

window.WineView = Backbone.View.extend({
    el: $("#mainArea"),
    initialize: function () {
        this.render();
    },
    render: function (eventName) {
        var template = _.template($("#wine-details").html(), {});
        $(this.el).html(template);
    },
    events: {
        "click #save_form": "save_form"
    },
    save_form: function () {
        var wine = new Wine();
        wine.save();
        return false;
    }
});
window.HeaderView = Backbone.View.extend({
    el: '.header',
    initialize: function () {
        this.render();
    },
    render: function (eventName) {
        var template = _.template($('#header').html());
        $(this.el).html(template());
        return this;
    },
    events: {
        "click .new": "newWine"
    },
    newWine: function (event) {
        var wine_View = new WineView();
        wine_View.render();
    }
});

在 WineView 中，当单击表单的提交按钮时，模型将被保存。 Backbone.sync 函数被覆盖。

var AppRouter = Backbone.Router.extend({
    routes: {
        "": "list"
    },
    list: function () {
        this.wineList = new WineCollection();
        this.wineListView = new WineListView({
            model: this.wineList
        });
        this.wineList.fetch();
    }
});
var app = new AppRouter();
Backbone.history.start();
var header = new HeaderView();

我担心的是，保存模型时，WineListView 不会刷新并显示已添加的新模型。准确地说，this.mode.bind("add") 不会被调用。

对于问题的冗长，我深表歉意。但是，这已经困扰我将近一个星期了。任何帮助是极大的赞赏。

干杯!

Answer 1

add 从未被调用的原因正是一旦你的酒被保存 wine.save(); 你应该添加一个成功函数并将它添加到 winelist 集合中

试试这个:

wine.save(wine.toJSON(), {
    success: function(){ 
        // model was saved successfully, now add it to the collection
        yourwinelist.add(wine);
        // if you can't access your wine list from this context, you might want to raise an event, and pass the wine, to catch it somewhere else:
        obj.trigger('myWineAdded', wine); // this can be raised on a global event aggregator
    },
    error: function(){ 
        // handle app when saving to server fails
        alert('failed to save wine');
    }
});

有关事件聚合器想法的更多信息，请查看:
Routing and the event aggregator coordinating views in backbone.js