Fancy fields select append list options from JSON

fancy_select.js

{% verbatim %}
<script type="text/javascript">

    $("#id_model_auto").fancyfields();
    $("#id_auto_vendor_select").fancyfields({

    onSelectChange: function (input,text,val){
        console.log("Current input - ID : "+input.attr("id") + " , selected text : " + text + " , value : " + val);

        var url = "/classifieds/auto-liist/" + val + "/";
        $("#id_model_auto").fancyfields("clean");

        $.getJSON(url,
        function(data){ // заполняем
            var $models_list = $('#id_model_auto');
            $models_list.empty();
            $models_list.append(
                    $('<option>', {text: ''})
            )

            var listOptions = []
          $.each(data['cars'], function(v, n){
            console.log(v);
             console.log(n);
             listOptions.push([n, v]);
             //$models_list.append(
               //$('<option>', {text: n, value: v})
             //);
          });

            $("#id_model_auto").setOptions(listOptions);

        });
    }
});

</script>
{% endverbatim %}