如何在主干视图中加载模型集合

How to load Collection of models in Backbone View?

本文关键字：加载 模型 集合 视图      更新时间：2023-09-26

我正在尝试学习Backbone.js，为此，我现在要将模型集合加载到视图中。通过在窗口中打开一个选项卡，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>

在这个模板中，我现在要加载一个属于ticketId的消息集合。所以我做了一个这样的集合:

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

和view:

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

所以我想把消息列表插入到#conversation1(对于ticketId 1)中。

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

不幸的是什么都没有发生，当我看向控制台时，我看到的是ticketId: 1，而不是el: undefined。我有点迷失在我做错了什么(有点迷失在骨干一般)。

有谁知道我在这里做错了什么以及我如何解决它吗?欢迎所有的建议!

我想这就是你想要的:

<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>
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