Question

I’d like to display specific elements in my template if my model is new vs existing.

I tried to show {{ id }}, {{ cid }} and {{ isNew }} but all of them are empty.

Here’s the examples :

// The Model
var MyModel = Backbone.Model.extend({});

// In the view
var model = new Contact();
this.$el.empty().append(this.template(model.toJSON()));

// The template :
{{#if isNew}}New model{{/if}}

How can I test ?

Answer 1

Here’s the solution I come up with :

// The Model
var MyModel = Backbone.Model.extend({
    'toJSON': function () {
    // Copied from the source
    var obj = _.clone(this.attributes);

    obj['isNew'] = this.isNew();
    return obj;
    }
});

Of course, this ensure that this model does not have the attribute “isNew” 😉