javascript - 把手在渲染主干中出错：未捕获的类型错误：无法读取未定义的属性“对象”

Question

我已经通过集合和使用函数获取，toJson()结果是这样的：

对象{结果：数组[4]}；

所以我将此对象传递给车把，但比较错误：

未捕获的类型错误：无法读取未定义的属性“对象”。

var wrapper;
var HomeView = Backbone.View.extend({

    template: Handlebars.compile(template),

    events: {

    },

    initialize: function () {

        console.log("inhomeview");

        var amici = new Usercollection();
        amici.fetch({
            success: function () {
                amici.each(function (object) {

                    console.log(object.toJSON());
                    wrapper = object.toJSON();

                });
            },
            error: function (amici, error) {
                // The collection could not be retrieved.
            }
        });

        this.render();

    },

    render: function () {

        var context = wrapper;
        var html = this.template(context);
        console.log(html);

        $('#pagina').html(this.$el.html(html));

    }

});

return HomeView;

});

模板是这样的：

<section id="home">
    <button>Scream</button>
    <input type="text" name="scream">
    <button>mt</button>
    <section class="lista">
        <ul>{{#each Object}}
            <li>
                <a href="#user/{{objectId}}">
                    <img src="{{avatar.url}}" width="69" height="69" />
                     <h3>        {{username}} {{email}}</h3> 
                     <h4>7 m</h4>
                    <h5>32 min</h5>
                </a>
            </li>{{/each}}</ul>
    </section>
</section>

Answer 1

在回调执行之前不要调用渲染。

amici.fetch({
            success: function () {
                amici.each(function (object) {

                    console.log(object.toJSON());
                    wrapper = object.toJSON();
                    this.render();

                });
            },
            error: function (amici, error) {
                // The collection could not be retrieved.
            }
        });