@render_to('equipment/search.html')
def search(request):

    if 's' in request.GET:
        s = request.GET['s']
    else:
        return {'error': 'Вы должны указать критерий поиска'}
    if len(s) < 3:
        return {'error': 'Длина запроса должна составлять не менее %s символов' % MINIMUM_SEARCH_LENGTH }

    try:
        page = int(request.GET.get('page', '1'))
    except ValueError:
        page = 1

    unit_list = Unit.objects.filter(Q(model__icontains=s) |
            Q(brand__name__icontains=s) | Q(brief_description__icontains=s) | Q(additional_info__icontains=s))

    paginator = Paginator(unit_list, 4)

    try:
        units = paginator.page(page)
    except (EmptyPage, InvalidPage):
        units = paginator.page(paginator.num_pages)

    return { 'units': units, 'query': s }