RevisionStaticFileStorage pass settings.STATIC_REV to url

storage.py

# coding: utf-8
from __future__ import unicode_literals

from django.conf import settings

from django.contrib.staticfiles.storage import StaticFilesStorage


class RevisionStaticFilesStorage(StaticFilesStorage):
    def url(self, name):
        version = getattr(settings, 'STATIC_REV', None)
        url = super(RevisionStaticFilesStorage, self).url(name)

        return "{}?r={}".format(url, version)