Allow null end for daterange

udata_front/frontend/helpers.py

@@ -287,19 +287,23 @@ def short_day(date):
 
 def daterange_with_details(value):
  '''Display a date range in the shorter possible maner.'''
- delta = value.end - value.start
+ if value.end:
+ delta = value.end - value.start
+ else:
+ delta = None
+
  start, end = None, None
- if is_first_year_day(value.start) and is_last_year_day(value.end):
+ if is_first_year_day(value.start) and (not value.end or is_last_year_day(value.end)):
  start = value.start.year
- if delta.days > 365:
+ if delta and delta.days > 365:
  end = value.end.year
- elif is_first_month_day(value.start) and is_last_month_day(value.end):
+ elif is_first_month_day(value.start) and (not value.end or is_last_month_day(value.end)):
  start = short_month(value.start)
- if delta.days > 31:
+ if delta and delta.days > 31:
  end = short_month(value.end)
  else:
  start = short_day(value.start)
- if value.start != value.end:
+ if value.end and value.start != value.end:
  end = short_day(value.end)
  return _('%(start)s to %(end)s', start=start, end=end) if end else start
 
@@ -314,13 +318,15 @@ def daterange(value, details=False):
  if details:
  return daterange_with_details(value)
 
- date_format = '%Y'
 
- delta = value.end - value.start
- start, end = None, None
+ date_format = '%Y'
  start = value.start.strftime(date_format)
- if delta.days > 365:
- end = value.end.strftime(date_format)
+
+ end = None
+ if value.end:
+ delta = value.end - value.start
+ if delta.days > 365:
+ end = value.end.strftime(date_format)
 
  return '{start!s}–{end!s}'.format(start=start, end=end) if end else start