Marionette Nested CompositeViews and Change Events Either not firing or happening in reverse - marionette

Question

tl;dr
http://jsfiddle.net/fRTBU/2/
Have a Marionette App that I am showing a list of Baseball Cities.
window.teams = new MyApp.Models.TeamCollection([
{ League : "AL", City : "Boston" , TeamId : 1 },
{ League : "AL", City : "Chicago" , TeamId : 2 },
{ League : "NL", City : "Chicago" , TeamId : 3 }
]);
I want to have a list of the cities broken down by league.
something like :
<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>
I can get that to render.
But when I try to add a new team (For expansion :P)
window.teams.push(new MyApp.Models.Team({ League : "NL",
City : "Washington",
TeamId : 4 }));
The collection change events don't fire ( in the JSFiddle )
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));
}
or in my app (with more logic surrounding it )
ReferenceError: TeamId is not defined
main app structure
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));
}
});
When I say they are happening in reverse it appears as though the MyApp.Views.ListItemView gets a collection and MyApp.Views.ListCompositeView gets a model.
JsFiddle Link Again
http://jsfiddle.net/fRTBU/2/

Answer 1

Okay, so there are a few issues here. The reason your events aren't firing in the TableView is because you break the event bindings to the window.teams collection when you replace its collection with this.collection = new Backbone.Collection(_.toArray(grid)); -- at that point its collection is no longer window.teams.
Another issue is that you're trying to display the data as if it were modeled like:
Leagues
|______League
| |______Team
| |______Team
|
|______League
|______Team
|______Team
|______Team
... but your data is coming in structured like:
Teams
|______Team
|______Team
|______Team
One solution would be to have a TeamCollection that accepts your data in the { League : "AL", City : "Boston" , TeamId : 1 } format, and to bind change events to a function that updates a LeagueTeamsCollection per league, and use that collection as the basis for 2 view classes: a CompositeView and an ItemView.