Question

我正在尝试学习Backbone.js，为此我现在想要将一组模型加载到视图中。通过在窗口中打开选项卡，我首先添加以下模板：

<script type="text/template" id="tab-content-template">
    <div class="conversation-window" id="conversation<%= ticketId %>"></div>
</script>

在这个tempalte中，我现在想要加载属于ticketId的消息集合。所以我制作了这样一个集合：

var MessageCollection = Backbone.Collection.extend({
    url: 'ticket/:id/messages'
});

和观点：

var MessageView = Backbone.View.extend({
    initialize: function(models, options) {
        this.ticketId = options.ticketId;
    },
    el: function() {
        return '#conversation' + this.ticketId;
    },
    className: 'user-message'
});

所以我希望在＃conversation1（对于ticketId 1）中插入消息列表。然后我试着运行这个：

var messageView = new MessageView(messageCollection, {ticketId: 1});
messageView.render();
console.log(messageView);

不幸的是没有任何事情发生，当我查看控制台时，我看到ticketId: 1但是el: undefined。我有点迷失在我做错的事情上（总的来说，它在Backbone中丢失了。）

有人知道我在这里做错了什么以及如何解决它？欢迎所有提示！

Answer 1

我认为这就是你想要的：

<div id = "conversation1">stuff insert here</div>
<script>
  var MessageCollection = Backbone.Collection.extend({
    //  url: 'ticket/:id/messages'   //<-- put this in router
  });

  // you need to create an instance of you collection somewhere and pass in
  // models as parameter. note that your ticketId is included in the models:
  var messageCollection = new MessageCollection([{ticketId:1,attr:'stuff1'}, {ticketId:2,attr:'stuff1'}])


  var MessageView = Backbone.View.extend({
    initialize: function(models, options) {
        this.ticketId_1 = this.collection.models[0].get('ticketId');
        this.ticketId_2 = this.collection.models[1].get('ticketId');
    },
    // can not reference el and define a <div id="user-message"> simultaneously
    /*
    el: function() {
        return '#conversation' + this.ticketId;
    }, 
    */
    className: 'user-message',
    render: function() {
        $('#conversation'+ this.ticketId_1).html(this.$el.html('stuff from model goes in here'));
    }
});

// var messageView = new MessageView( messageCollection, {ticketId: 1});
// the above wouldn't work. your ticketId should be passed into your view via model
// then you associate you view to your collection like so: 
var messageView = new MessageView({ collection: messageCollection });
messageView.render();
console.log(messageView.$el.html());

</script>

如何在Backbone View中加载模型集合？

1 个答案: