def upload_location(instance, filename):
news = instance
# получаем имя модели в нижнем регистре
model_name = news.__class__.__name__.lower()
filebase, extentions = filename.split(".")
filename = ''.join(choice(ascii_letters) for i in range(9)).lower()
return model_name + "/" + model_name + "%s/%s.%s" %(
instance.id, filename, extentions)