为什么我的Marionette itemView无法渲染?

时间:2015-08-11 21:30:55

标签: javascript backbone.js marionette backbone-collections

我使用带有Handlebars模板的Marionette,我无法让我的itemView在CollectionView中渲染。

这是CollectionView代码:

define( [ 'App', 'marionette', 'handlebars', 'models/Model', 'collections/Collection', 'text!templates/welcome.html'],
function(App, Marionette, Handlebars, Model, Collection, template) {
    //ItemView provides some default rendering logic
    var ItemView = Marionette.ItemView.extend( {
        //Template HTML string
        template: Handlebars.compile(template),
        //model: new Model(),

        // View Event Handlers
        events: {

        },
        initialize: function(o) {
            console.log('init itemView');
        }
    });
    return Marionette.CollectionView.extend( {
        issues: new Collection(),
        itemView: ItemView,
        onRender: function() {this.issues.fetch()},
        initialize: function(o) { console.log('init collectionView')}
    });
});

这是模板

<div class="hero-unit">
<h1>Marionette-Require-Boilerplate Lite</h1>
<p>Lightweight Marionette Boilerplate application to get you off the ground fast.</p>
<p class="muted">
    You are viewing this application on
   </p>
<br/>
<table>
    {{#each items}}
    <tr><td>{{title}} - {{number}}</td></tr>
    {{/each}}
</table>
<a class="btn btn-primary btn-large" href="https:github.com/BoilerplateMVC/">See more Boilerplates</a>

我从这段代码中得到的唯一一件事就是CollectionView确实触发了它的initialize方法,并且该集合是从GitHub中获取的。

2 个答案:

答案 0 :(得分:2)

根据您使用的木偶版本,有多种原因无法使用:

  1. 对于最新的Marionette版本,您必须使用&#39; childView&#39;而不是&#39; itemView&#39;。
  2. 要显示的项目预计在物业&#39;集合&#39;不是&#39;问题&#39;。

    示例:

      var IssuesView = Marionette.CollectionView.extend({
        childView: IssueView,
        onRender: function () {
          this.collection.fetch();
        },
        initialize: function (o) {
          console.log('init collectionView');
        }
      });
      new IssuesView({'collection': new Backbone.Collection()});
    
  3. 现在,根据您提供的代码,我假设您的目标是在项目中显示问题,如果这是正确的,我建议您使用&#39; CompositeView&#39;相反,然后你可以提供一个容器&#39;并提出问题&#39;在物品里面。例如:

            var IssueView = Marionette.ItemView.extend({
                itemTag: 'tr',
                //Template HTML string
                template: Handlebars.compile($("#item-template").html()),
                //model: new Model(),
    
                // View Event Handlers
                events: {
    
                },
                initialize: function (o) {
                    console.log('init itemView');
                }
            });
            var IssuesView = Marionette.CompositeView.extend({
                childView: IssueView,
                childViewContainer: "#issues",
                template: Handlebars.compile($("#some-template").html()),
                onRender: function () {
                    //this.issues.fetch();
                },
                initialize: function (o) {
                    console.log('init collectionView');
                }
            });
    

    模板的位置:

    <script id="item-template" type="text/x-handlebars-template">
       <td> 
        {{title}} - {{number}}
       </td>
    </script>
    <script id="some-template" type="text/x-handlebars-template">
      <div class = "hero-unit" >
        <h1>Marionette - Require - Boilerplate Lite </h1>
        <p>Lightweight Marionette Boilerplate ...</p>
        <p class = "muted"> You are viewing this application on </p>
        <br/>
        <table id="issues">
    
        </table>
     </script>
    

    这是jsfiddle的工作版本: http://jsfiddle.net/gvazq82/v5yj6hp4/2/

答案 1 :(得分:1)

您的问题是您没有在CollectionView中指定集合。你想改为

var collectionView = Marionette.CollectionView.extend({
    collection: new issues
   ...
});