[kubik]

$( "#street" ).autocomplete({
        source: function( request, response ) {
            $.ajax({
                dataType:"json",
                url: "/main/search",
                data: {
                    city: function(){return $('#city_id').val()},
                    locality: function(){return $('#locality_id').val()},
                    street: function(){return $('#street').val()},
                    AutoCompleteFor: "street"
                },
                success:function(data) {
                    response($.map(data, function(item) {
                        return {
                            label: item
                        };
                    }))}
            });
        }
    });

Так решилось.