Backbone.js - change not triggering while the name change - backbone.js

Question

In my backbone function, while the name get change the change function not at all triggering.. any one suggest me the right way to get it.. (actually i need to get changed stuff and need to update);
code :
(function($){
var list = {};
list.model = Backbone.Model.extend({
defaults:{
name:'need the name'
},
initialize:function(){
this.bind('change:name', function(model) {
console.log('Model->change()', model);
});
}
});
list.collect = Backbone.Collection.extend({
model:list.model,
url : 'data/names.json',
initialize:function(){
this.fetch({update:true});
this.keepUpdate();
},
keepUpdate:function(){
var that = this;
var updateData = function(){
that.fetch({update:true});
myTimeout = setTimeout(updateData,10000);
}
var myTimeout = setTimeout(updateData,10000);
}
});
list.view = Backbone.View.extend({
initialize:function(){
this.collection = new list.collect();
this.collection.on("update", this.render, this);
this.collection.bind("change:name", function(model, attributes){
console.log(model,attributes,'property changed'); // this is not triggering at all..
});
},
render:function(data){
_.each(this.collection.models, function(data){
//console.log(data.get('name')); it works fine
})
},
updateName:function(){
console.log('updated called');
}
});
var newView = new list.view();
})(jQuery)

Answer 1

Collection.fetch doesn't trigger the change event. You only get the reset event. If you need more granular events, consider calling fetch with the options {update:true}.
that.fetch({update:true});
That will trigger change event for every model that was already in the collection, and add if the model was previously not in the collection.

Answer 2

Try removing keepUpdate from the collection and put a setTimeout in the initialize function of the view at the end. I suggest that fetch is called from the view as well as this.collection.fetch() instead of the collection's initialize function. Makes your code more reusable.

Answer 3

I'm not sure I understand your question. What are you trying to achieve ?
I don't think that fetch accepts {add:true} as a parameter (I just checked the source code and it does not appear anywhere).
When fetch completes, it only triggers a reset event (not an add). You should listen to that if you want to do something when the content of the collection changes. You can also simplify listen to change.