var Photo = Backbone.Model.extend({
    validate: function (attribs) {
        if (attribs.src === undefined) {
            return "Remember to set a source for your image!";
        }
    },
    initialize: function () {
        console.log('this model has been initialized');
        this.on("error", function (model, error) {
            console.log(error);
        });
    }
});
var myPhoto = new Photo();
myPhoto.set({ title: "On the beach" });
//logs Remember to set a source for your image!

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

Cg==