def datetime_parse(string_value, **_):
for iso_format in datetime_iso_formats:
try:
return datetime.strptime(string_value, iso_format)
except ValueError:
pass
raise ValidationError(
'Time data "%s" does not match any of the formats %s' %
(string_value, ', '.join('"%s"' % x for x in datetime_iso_formats)))
def time_parse(string_value, **_):
if string_value.lower() == 'now':
return datetime.now().time()
for time_iso_format in time_iso_formats:
try:
return datetime.strptime(string_value, time_iso_format).time()
except ValueError:
pass
formats = ', '.join('"%s"' % x for x in time_iso_formats)
raise ValidationError(f'Time data "{string_value}" does not match any of the formats "now" or {formats}')
def datetime_parse(string_value, **_):
for iso_format in datetime_iso_formats:
try:
return datetime.strptime(string_value, iso_format)
except ValueError:
pass
result = parse_relative_datetime(string_value)
if result is None:
formats = ', '.join('"%s"' % x for x in datetime_iso_formats)
raise ValidationError(f'Time data "{string_value}" does not match any of the formats "now", {formats}, and is not a relative date like "2d" or "2 weeks ago"')
return result
def date_parse(string_value, **_):
extra_information = ''
try:
return datetime.strptime(string_value, date_iso_format).date()
except ValueError as e:
if 'out of range' in str(e) or 'unconverted data remains' in str(e):
extra_information = ' (out of range)'
result = parse_relative_datetime(string_value)
if result is None:
formats = ', '.join('"%s"' % x for x in datetime_iso_formats)
raise ValidationError(f'Time data "{string_value}" does not match any of the formats "now", {formats}, and is not a relative date like "2d" or "2 weeks ago"{extra_information}')
return result.date()
def decimal_parse(string_value, **_):
try:
return Decimal(string_value)
except InvalidOperation:
raise ValidationError("Invalid literal for Decimal: '%s'" %
string_value)
def time_parse(string_value, **_):
try:
return datetime.strptime(string_value, time_iso_format).time()
except ValueError as e:
raise ValidationError(str(e))
def choice_queryset__parse(field, string_value, **_):
try:
return field.model.objects.get(
pk=string_value) if string_value else None
except field.model.DoesNotExist as e:
raise ValidationError(str(e))
def parse_relative_date(s, start_date=None):
period = s.strip()
weekday_symbols = [
'wd', 'weekday', 'weekdays', 'bd', 'bankday', 'bankdays'
]
day_symbols = ['d', 'day', 'days']
week_symbols = ['w', 'wk', 'week', 'weeks']
month_symbols = ['m', 'mo', 'mon', 'month', 'months']
quarter_symbols = ['q', 'quarter', 'quarters']
year_symbols = ['y', 'yr', 'year', 'years']
period_symbols = weekday_symbols + day_symbols + week_symbols + month_symbols + quarter_symbols + year_symbols
neg = False
period = period.lower()
if period in ('today', 'now'):
period = '0d'
start_date = None
elif period == 'yesterday':
period = '-1d'
start_date = None
elif period == 'tomorrow':
period = '1d'
start_date = None
if period.endswith('ago'):
period = period[:-len('ago')].strip()
neg = True
if period.endswith('_'):
period = period[:-1]
sym = None
for symbol in period_symbols:
if period.endswith(symbol):
period = period[:-len(symbol)]
sym = symbol
break
d = None
if sym:
try:
count = int(period)
except ValueError:
raise ValidationError(
f'"{s}" is not a valid relative date. "{period}" is not an integer.'
)
if neg:
count = -count
if start_date:
today = start_date
else:
today = date.today()
day = today.day
month = today.month
year = today.year
if sym in day_symbols:
if count >= 10000:
raise ValidationError(
f'"{s}" is not a valid relative date. {count} is too big (max is 9999).'
)
d = today + timedelta(days=count)
elif sym in week_symbols:
if count >= 2000:
raise ValidationError(
f'"{s}" is not a valid relative date. {count} is too big (max is 1999).'
)
d = today + timedelta(weeks=count)
elif sym in month_symbols or sym in quarter_symbols:
if sym in quarter_symbols:
if count >= 167:
raise ValidationError(
f'"{s}" is not a valid relative date. {count} is too big (max is 166).'
)
count *= 3
if count >= 500:
raise ValidationError(
f'"{s}" is not a valid relative date. {count} is too big (max is 499).'
)
month += count
if month < 1 or month > 12:
(y, m) = divmod(month - 1, 12)
year += y
month = m + 1
valid = False
while not valid:
try:
d = date(year, month, day)
valid = True
except ValueError:
day -= 1
elif sym in year_symbols:
if count >= 400:
raise ValidationError(
f'"{s}" is not a valid relative date. {count} is too big (max is 399).'
)
year += count
valid = False
while not valid:
try:
d = date(year, month, day)
valid = True
except ValueError:
day -= 1
elif sym in weekday_symbols:
weeks, days = divmod(count, 5)
d = today
weekday = d.weekday()
if weekday in [5, 6]:
d -= timedelta(days=weekday - 4)
weekday = 4
if weeks:
d += timedelta(days=weeks * 7)
if days:
d += timedelta(days=days)
new_weekday = d.weekday()
if new_weekday in [5, 6] or new_weekday < weekday:
d += timedelta(days=2)
return d