98 lines
3.3 KiB
Python
98 lines
3.3 KiB
Python
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"""
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A DateTimeField and DateField that use the `dateutil` package for parsing.
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"""
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from __future__ import unicode_literals
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from dateutil import parser
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from wtforms.fields import Field
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from wtforms.validators import ValidationError
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from wtforms.widgets import TextInput
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__all__ = (
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'DateTimeField', 'DateField',
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)
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# This is a fix to handle issues in dateutil which arose in version 2.2.
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# A bug ticket is filed: https://bugs.launchpad.net/dateutil/+bug/1247643
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try:
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parser.parse('foobar')
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except TypeError:
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DATEUTIL_TYPEERROR_ISSUE = True
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except ValueError:
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DATEUTIL_TYPEERROR_ISSUE = False
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else:
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import warnings
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warnings.warn('In testing for a dateutil issue, we ran into a very strange error.', ImportWarning)
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class DateTimeField(Field):
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"""
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DateTimeField represented by a text input, accepts all input text formats
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that `dateutil.parser.parse` will.
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:param parse_kwargs:
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A dictionary of keyword args to pass to the dateutil parse() function.
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See dateutil docs for available keywords.
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:param display_format:
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A format string to pass to strftime() to format dates for display.
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"""
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widget = TextInput()
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def __init__(self, label=None, validators=None, parse_kwargs=None,
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display_format='%Y-%m-%d %H:%M', **kwargs):
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super(DateTimeField, self).__init__(label, validators, **kwargs)
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if parse_kwargs is None:
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parse_kwargs = {}
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self.parse_kwargs = parse_kwargs
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self.display_format = display_format
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def _value(self):
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if self.raw_data:
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return ' '.join(self.raw_data)
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else:
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return self.data and self.data.strftime(self.display_format) or ''
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def process_formdata(self, valuelist):
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if valuelist:
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date_str = ' '.join(valuelist)
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if not date_str:
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self.data = None
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raise ValidationError(self.gettext('Please input a date/time value'))
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parse_kwargs = self.parse_kwargs.copy()
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if 'default' not in parse_kwargs:
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try:
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parse_kwargs['default'] = self.default()
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except TypeError:
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parse_kwargs['default'] = self.default
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try:
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self.data = parser.parse(date_str, **parse_kwargs)
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except ValueError:
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self.data = None
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raise ValidationError(self.gettext('Invalid date/time input'))
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except TypeError:
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if not DATEUTIL_TYPEERROR_ISSUE:
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raise
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# If we're using dateutil 2.2, then consider it a normal
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# ValidationError. Hopefully dateutil fixes this issue soon.
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self.data = None
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raise ValidationError(self.gettext('Invalid date/time input'))
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class DateField(DateTimeField):
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"""
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Same as the DateTimeField, but stores only the date portion.
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"""
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def __init__(self, label=None, validators=None, parse_kwargs=None,
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display_format='%Y-%m-%d', **kwargs):
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super(DateField, self).__init__(label, validators, parse_kwargs=parse_kwargs, display_format=display_format, **kwargs)
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def process_formdata(self, valuelist):
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super(DateField, self).process_formdata(valuelist)
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if self.data is not None and hasattr(self.data, 'date'):
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self.data = self.data.date()
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