Django admin export all the records of the current queryset to XLS

admin.py

import xlwt
from django.http import HttpResponse


def export_xls(modeladmin, request, queryset):
    meta = modeladmin.model._meta
    filename = '%s.xls' % meta.verbose_name_plural.lower()

    def get_verbose_name(fieldname):
        name = filter(lambda x: x.name == fieldname, meta.fields)
        if name:
            return (name[0].verbose_name or name[0].name).upper()
        return fieldname.upper()

    response = HttpResponse(mimetype='application/ms-excel')
    response['Content-Disposition'] = "attachment;filename=%s" % filename

    wbk = xlwt.Workbook()
    sht = wbk.add_sheet(meta.verbose_name_plural)

    for j, fieldname in enumerate(modeladmin.list_display[1:]):
        sht.write(0, j, get_verbose_name(fieldname))

    for i, row in enumerate(queryset):
        for j, fieldname in enumerate(modeladmin.list_display[1:]):
            sht.write(i + 1, j, unicode(getattr(row, fieldname, '')))

    wbk.save(response)
    return response

change_list.js

var $form = $("#changelist-form");
$form.find('select[name=action]').change(function() {
    $form.find('input[name=select_across]').val(+( this.value === 'export_xls' ));
    if ( this.value === 'export_xls' )
        $form.append('<input type="hidden" value="1" name="_selected_action">');
    else
        $form.find('input[name=_selected_action][type=hidden]').remove()
});