path_and_rename.py

from django.utils.deconstruct import deconstructible


@deconstructible
class PathAndRename(object):
    def __init__(self, sub_path):
        self.path = sub_path

    def __call__(self, instance, filename, prefix=None, unique=False):
        """
        Transliteration of Russian characters
        """
        symbols = (u"абвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ",
                   u"abvgdeejzijklmnoprstufhzcss_y_euaABVGDEEJZIJKLMNOPRSTUFHZCSS_Y_EUA")
        tr = {ord(a): ord(b) for a, b in zip(*symbols)}
        return op.join(self.path, filename.translate(tr))


path_and_rename = PathAndRename("uploads/")