Javascript 如何在主干视图中加载模型集合?
我正在努力学习,为此,我现在想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:Javascript 如何在主干视图中加载模型集合?,javascript,backbone.js,collections,Javascript,Backbone.js,Collections,我正在努力学习,为此,我现在想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> 还有一个观点: var MessageView =
<script type="text/template" id="tab-content-template">
<div class="conversation-window" id="conversation<%= ticketId %>"></div>
</script>
还有一个观点:
var MessageView = Backbone.View.extend({
initialize: function(models, options) {
this.ticketId = options.ticketId;
},
el: function() {
return '#conversation' + this.ticketId;
},
className: 'user-message'
});
因此,我希望在对话1中插入ticketId 1的消息列表。然后我试着运行这个:
var messageView = new MessageView(messageCollection, {ticketId: 1});
messageView.render();
console.log(messageView);
不幸的是什么也没有发生,当我查看控制台时,我看到ticketId:1,但el:undefined。我有点迷失在我做错的事情中,有点迷失在我的脊梁上
有人知道我做错了什么,我如何解决它吗?欢迎所有提示 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>
我不确定您是否正在对集合运行fetch以填充其中的模型,尽管我确实看到您将messageCollection传递到MessageView,但我通常将其设置为集合而不是模型。此外,我在视图中看不到指向模板的直接链接。我不确定您是想查看包含数据的模型,还是页面的呈现?如果您在视图中定义el,则告诉主干管理一个现有元素—在本例中,是ID为“conversation1”的元素。该元素位于您在邮件顶部发布的模板中。在实例化messageView之前,是否确实要将其呈现到页面中?
<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>