Not defined error when using javascript objects

Question

Better explained with code, is there a way around this error? Im trying to simulate a namespace.

window.SomeNamespace = {
        Notification: Backbone.Model.extend(),
        Notifications: Backbone.Collection.extend({
            model: SomeNamespace.Notification //error here. SomeNamespace is not defined
        }),
};

At the time you define the object, you cannot access itself. It does not exist yet. — Felix Kling
– Felix Kling, Commented Aug 27, 2011 at 16:55
On your second line Backbone.Model.extend() should probably just be new Backbone.Model — Mauvis Ledford
– Mauvis Ledford, Commented Sep 17, 2011 at 7:25

ThiefMaster · Accepted Answer · 2011-08-27 16:53:35Z

5

window.SomeNamespace and thus the global SomeNamespace will not be defined until the right side of the = has been executed. So you'll have to split it into two parts.

window.SomeNamespace = {
        Notification: Backbone.Model.extend(),
};


window.SomeNamespace.Notifications = Backbone.Collection.extend({
    model: SomeNamespace.Notification
});

Of course you can do it in a nicer way by using the extend() method.

answered Aug 27, 2011 at 16:53

ThiefMaster

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1 Comment

ThiefMaster Over a year ago

I thought Backbone.Collection.extend would be generic but apparently it isn't.. so the way i used is fine.

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