木偶嵌套复合视图和更改事件要么不触发,要么反向发生

时间:2013-04-23 20:43:36

标签: marionette

TL;博士 http://jsfiddle.net/fRTBU/2/

有一个木偶应用程序,我正在显示一个棒球城市列表。

window.teams = new MyApp.Models.TeamCollection([
        { League : "AL", City : "Boston"  , TeamId : 1 },
        { League : "AL", City : "Chicago" , TeamId : 2 },
        { League : "NL", City : "Chicago" , TeamId : 3 }
        ]);

我希望列出按联盟细分的城市名单。

类似的东西:

<table>
<tr>
   <td> 
     <h2>AL</h2>
     <ul>
        <li>Boston 1 </li>
        <li>Chicago 2</li>
     </ul>
   </td>
</tr>
<tr>
   <td> 
     <h2>NL</h2>
     <ul>
        <li>Chicago 3 </li>
     </ul>
   </td>
</tr>
</table>  

我可以让它渲染。

但是当我尝试添加一个新团队时(对于扩展:P)

window.teams.push(new MyApp.Models.Team({ League : "NL", 
                                            City : "Washington", 
                                          TeamId : 4 })); 

集合更改事件不会触发(在JSFiddle中)

http://jsfiddle.net/fRTBU/2/

collectionEvents: {
    "reset": "myFunc"  ,
    "change" : "myFunc", 
    "add" : "myFunc"
},
myFunc: function () {
    Logger('myFunc');
    var grid = window.teams.groupBy(function (row) {
        return row.get("League");
    });
    this.collection = new Backbone.Collection(_.toArray(grid));
}

或在我的应用中(周围有更多逻辑)

ReferenceError: TeamId is not defined

主要应用结构

MyApp.Models.Team = Backbone.Model.extend({
    idAttribute: 'TeamId'
});

MyApp.Models.TeamCollection = Backbone.Collection.extend({
    model: MyApp.Models.Team
});

MyApp.Views.ListItemView = Backbone.Marionette.ItemView.extend({
    tagName: 'tr',
    template : '#row-template'
});

MyApp.Views.ListCompositeView = Backbone.Marionette.CompositeView.extend({
    itemView: MyApp.Views.ListItemView,
    template: "#list-template",
    itemViewContainer: "ul",
    initialize: function () {
        this.collection = new Backbone.Collection(
                                  _.toArray(this.model.attributes));
    },
    onRender: function () {
        $(this.$el).find("h2.ListHead")
                   .html(this.collection.models[0].get('League'));
    }
});

MyApp.Views.TableView = Backbone.Marionette.CompositeView.extend({
    itemView: MyApp.Views.ListCompositeView,
    tagName: "table",
    itemViewContainer: "tbody",
    template: "#table-template",
    initialize : function () {
       this.myFunc();
    },
    collectionEvents: {
        "reset": "myFunc"  ,
        "change" : "myFunc", 
        "add" : "myFunc"
    },
    myFunc: function () {
        Logger('myFunc');
        var grid = window.teams.groupBy(function (row) {
            return row.get("League");
        });
        this.collection = new Backbone.Collection(_.toArray(grid));
    }
});

当我说他们正在反向发生时,似乎MyApp.Views.ListItemView获得了一个集合而MyApp.Views.ListCompositeView获得了一个模型。

JsFiddle Link Again http://jsfiddle.net/fRTBU/2/

1 个答案:

答案 0 :(得分:2)

好的,这里有一些问题。您的事件未在TableView中触发的原因是,当您使用window.teams替换其集合时,您会将事件绑定到this.collection = new Backbone.Collection(_.toArray(grid));集合 - 此时它的集合为no更长window.teams

另一个问题是,您尝试将数据显示为如下所示:

Leagues
   |______League
   |         |______Team
   |         |______Team
   |
   |______League
             |______Team
             |______Team
             |______Team

...但您的数据结构如下:

  Teams
   |______Team
   |______Team
   |______Team

一种解决方案是让TeamCollection{ League : "AL", City : "Boston" , TeamId : 1 }格式接受您的数据,并将更改事件绑定到每个联盟更新LeagueTeamsCollection的函数,并使用该集合作为2个视图类的基础:CompositeViewItemView