def update_2014_08_25():
    # If a hot car has a color of NONE, set to None.
    from dcmetrometrics.hotcars.models import HotCarReport
    count = 0
    for hc in HotCarReport.objects(color = "NONE"):
      count += 1
      hc.color = None
      hc.save()
    print "Reset color on %i records"%count