def view_city(environ, id_region=None):
if not id_region:
return ''
city_list = City.filter(region_id=int(id_region[0]))
response = u'<option value="">---</option>'
for city in city_list:
response += u'<option value="{0}">{1}</option>'.format(city.id, city.name)
return HttpResponse(response)
