class DatetimePeriodValidator(object):
"""
Validator for a date time period
"""
def __init__(self, errors):
"""
Initialise
:param errors: a dictionary of errors to add to if there is a validation problem
:return:
"""
self._errors = errors
self._dateTimeValidator = DatetimeValidator(errors)
def get_valid_start_end_datetimes(self, start_key, end_key, values):
"""
Retunr a start end datetime pair
if there is an error add it to the error dictionary returning None for invalid date if there is one
:param start_key: key the the start datetime
:param end_key: key for the end datetime
:param values: values dictionary
:return: valid start end date pair or None if date can not be converted
"""
start_date = self._dateTimeValidator.get_valid_datetime(start_key, values)
end_date = self._dateTimeValidator.get_valid_datetime(end_key, values)
if end_date is not None and start_date is not None:
if start_date > end_date:
self._errors[end_key] = 'End date must not be before the start date'
return start_date, end_date
def __init__(self, errors):
"""
Initialise
:param errors: a dictionary of errors to add to if there is a validation problem
:return:
"""
self._errors = errors
self._dateTimeValidator = DatetimeValidator(errors)