class CountSearch(JSONResponseMixin, View):
    def render_to_response(self, context, **response_kwargs):
        return self.render_to_json_response(context, **response_kwargs)

    def get(self, request, *args, **kwargs):
        #http://127.0.0.1:5000/count/?type=1&districts=5,6,7&subways=1,2,3&year=2014&min_price=1000&max_price=4000
        form = CountSearchForm(request.GET)
        if form.is_valid():
            data = form.cleaned_data
            estates = EstateItem.objects\
                .filter(apartments_type__id=data['flat_type'])\
                .filter(district__id__in=data['districts'])\
                .filter(metro__id__in=data['subways'])\
                .filter(price_start_all=data['price_start_all'])\
                .filter(price_end_all=data['price_end_all'])\
                .filter(date_release__date_release__year=data['year'])
            estate_count = estates.count()
            json_response = {
                'flats': 1,
                'buildings': estate_count
            }
            context = {'count': json_response}
        else:
            context = {'errors': form.errors}
        return self.render_to_response(context)