Fixed #992 -- Fixed bug in archive_month generic view leaving out the last day…

Fixed #992 -- Fixed bug in archive_month generic view leaving out the last day of the month. Thanks, ubernostrum

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1571 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/views/generic/date_based.py

@@ -108,14 +108,10 @@ def archive_month(request, year, month, app_label, module_name, date_field,
     now = datetime.datetime.now()
     # Calculate first and last day of month, for use in a date-range lookup.
     first_day = date.replace(day=1)
-    last_day = date
-    for i in (31, 30, 29, 28):
-        try:
-            last_day = last_day.replace(day=i)
-        except ValueError:
-            continue
-        else:
-            break
+    if first_day.month == 12:
+        last_day = first_day.replace(year=first_day.year + 1, month=1)
+    else:
+        last_day = first_day.replace(month=first_day.month + 1)
     lookup_kwargs = {'%s__range' % date_field: (first_day, last_day)}
     # Only bother to check current date if the month isn't in the past.
     if last_day >= now.date():