Question

I have a backbone model

var app = app || {};

app.Era = Backbone.Model.extend({

    defaults: {
        from: Number.NEGATIVE_INFINITY,
        until: Number.POSITIVE_INFINITY,
        stash: {
            from: null,
            until: null
        },
        _enabled: true
    },

    toggle: function(){
        if(this.get('_enabled')){
            this.disable();
        }else{
            this.enable();
        }

        this.save();
    },

    enable: function(){
        this.from = this.stash.from;
        this.until = this.stash.until;

        this.stash.from = null; // strictly speaking unnecssary
        this.stash.until = null;

        this._enabled = true;
    },

    disable: function(){
        this.stash.from = this.from;
        this.stash.until = this.until;

        this.from = null;
        this.until = null;

        this._enabled = false;
    },

    enabled: function(){
        return this._enabled;
    },

});

which I’m trying to extend like so

Name = app.Era.extend({ defaults: { value: '' } });

This seems to work, I get no error in the console.
I can even instantiate a new Name, but when I try to instantiate a new Name, I get an Error message:

> era = new app.Era()
child
> era.get('from')
-Infinity
> Name = app.Era.extend({ defaults: { value: '' } })
function (){ return parent.apply(this, arguments); }
> name = new Name()
child
> name.get('value')
TypeError: Object [object Object] has no method 'get'

I’d be grateful of some feedback!

Answer 1

You can’t use name in that context, you’re running into window.name. If you start from scratch without the lowercase name variable you should run just fine. Also, fencliff makes good points in how to use default inheritance.