}
                    }
                },
                success: function (data) {
                    if (data.status === 0) {
                        $("optgroup[id^='optgroup']").empty();
                        let result = data['data']
                        const supportDb = [ {% for name in engines.keys %}"{{ name }}", {% endfor %}]
                        for (let i of result) {
                            let instance = "<option value=\"" + i.instance_name + "\" instance-id=" + i.id + ">" + i.i