Fixed #17937 -- Avoided an error in the timeuntil filter when it receives a date object. Thanks Dmitry Guyvoronsky for the report.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17774 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/timesince.py

@@ -3,7 +3,7 @@ import datetime
 from django.utils.timezone import is_aware, utc
 from django.utils.translation import ungettext, ugettext
 
-def timesince(d, now=None):
+def timesince(d, now=None, reversed=False):
     """
     Takes two datetime objects and returns the time between d and now
     as a nicely formatted string, e.g. "10 minutes".  If d occurs after now,
@@ -33,7 +33,7 @@ def timesince(d, now=None):
     if not now:
         now = datetime.datetime.now(utc if is_aware(d) else None)
 
-    delta = now - d
+    delta = (d - now) if reversed else (now - d)
     # ignore microseconds
     since = delta.days * 24 * 60 * 60 + delta.seconds
     if since <= 0:
@@ -57,6 +57,4 @@ def timeuntil(d, now=None):
     Like timesince, but returns a string measuring the time until
     the given time.
     """
-    if not now:
-        now = datetime.datetime.now(utc if is_aware(d) else None)
-    return timesince(now, d)
+    return timesince(d, now, reversed=True)