can't access backbone collection through object notation
I've got a backbone model with contains a collection. The output from the console when I do console.log(this.model) is
d
_changed: false
_changing: false
_escapedAttributes: Object
_previousAttributes: Object
attributes: Object
cid: "c1"
id: 63
itemlist: d
_byCid: Object
_byId: Object
_onModelEvent: function () { [native code] }
_removeReference: function () { [native code] }
length: 5
models: Array[5]
__proto__: o
url: "user/63"
__proto__: o
perfect! now, I want to get the itemlist collection so I can do this.model.itemlist.each(render(item)) .
But when I try to output console.log(this.model.itemlist) , I get an empty collection
d
_byCid: Object
_byId: Object
_callbacks: Object
_onModelEvent: function () { [native code] }
_removeReference: function () { [native code] }
length: 0
models: Array[0]
parent: d
__proto__: o
I'm not sure why this is, when I output the model, I can see the nested collection. why can't I get to the collection? or how can I get to the collection.
I create the nested collection via
user.fetch({
success: function(response){
user.itemlist = new itemlistcollection(response.items)
}
});
----------------- update -----------------
as @Paul help me to discover, the views are being triggered before the fetch function is completing, so I have the collection when I output from the fetch , but I don't have the collection available int he view, which is where it is needed.
The fetch action is occuring in my router, I've created a function to initialize the object if it hasn't already been initialized (not sure how others to this. My router looks like this
User.Router = Backbone.Router.extend ({
routes: {
"user/new": "newUser",
"user/:id": "userView"
"": "index"
},
re_initialize: function(id){
user.fetch({
success: function(response){
user.itemlist = new itemlistcollection(response.items)
}
});
},
userView: function(){
console.log(user.itemlist);
new User.View(user);
}
});
It might be a race condition since fetch is an asynchronous method.
Have you confirmed fetch has processed the request from the server before you call this.model.itemList ?
To confirm this, add a console log message in the fetch method
user.fetch({
success: function(response){
user.itemlist = new itemlistcollection(response.items)
console.log(user.itemList)
}
});
UPDATE
If you want the view to render the collection after it has been fetched, you trigger a 'fetched' event on your model, and have the view bind to this event to render the collection.
Here is an example of how you can update your code
user.fetch({
success: function(response){
user.itemList = new itemlistcollection(response.items);
user.trigger('fetched');
}
});
yourView = Backbone.View.extend({
initialize: function() {
this.model.bind('fetched', this.renderList, this);
},
renderList: function() {
this.model.itemList.each(render(item));
}
}
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