Source code for django.forms.extras.widgets

Extra HTML Widget classes
from __future__ import unicode_literals

import datetime
import re

from django.forms.widgets import Widget, Select
from django.utils import datetime_safe
from django.utils.dates import MONTHS
from django.utils.encoding import force_str
from django.utils.safestring import mark_safe
from django.utils.formats import get_format
from django.utils import six
from django.conf import settings

__all__ = ('SelectDateWidget',)

RE_DATE = re.compile(r'(\d{4})-(\d\d?)-(\d\d?)$')

def _parse_date_fmt():
    fmt = get_format('DATE_FORMAT')
    escaped = False
    output = []
    for char in fmt:
        if escaped:
            escaped = False
        elif char == '\\':
            escaped = True
        elif char in 'Yy':
            #if not self.first_select: self.first_select = 'year'
        elif char in 'bEFMmNn':
            #if not self.first_select: self.first_select = 'month'
        elif char in 'dj':
            #if not self.first_select: self.first_select = 'day'
    return output

[docs]class SelectDateWidget(Widget): """ A Widget that splits date input into three <select> boxes. This also serves as an example of a Widget that has more than one HTML element and hence implements value_from_datadict. """ none_value = (0, '---') month_field = '%s_month' day_field = '%s_day' year_field = '%s_year' def __init__(self, attrs=None, years=None, required=True): # years is an optional list/tuple of years to use in the "year" select box. self.attrs = attrs or {} self.required = required if years: self.years = years else: this_year = self.years = range(this_year, this_year+10) def render(self, name, value, attrs=None): try: year_val, month_val, day_val = value.year, value.month, except AttributeError: year_val = month_val = day_val = None if isinstance(value, six.string_types): if settings.USE_L10N: try: input_format = get_format('DATE_INPUT_FORMATS')[0] v = datetime.datetime.strptime(force_str(value), input_format) year_val, month_val, day_val = v.year, v.month, except ValueError: pass else: match = RE_DATE.match(value) if match: year_val, month_val, day_val = [int(v) for v in match.groups()] choices = [(i, i) for i in self.years] year_html = self.create_select(name, self.year_field, value, year_val, choices) choices = list(six.iteritems(MONTHS)) month_html = self.create_select(name, self.month_field, value, month_val, choices) choices = [(i, i) for i in range(1, 32)] day_html = self.create_select(name, self.day_field, value, day_val, choices) output = [] for field in _parse_date_fmt(): if field == 'year': output.append(year_html) elif field == 'month': output.append(month_html) elif field == 'day': output.append(day_html) return mark_safe('\n'.join(output)) def id_for_label(self, id_): first_select = None field_list = _parse_date_fmt() if field_list: first_select = field_list[0] if first_select is not None: return '%s_%s' % (id_, first_select) else: return '%s_month' % id_ def value_from_datadict(self, data, files, name): y = data.get(self.year_field % name) m = data.get(self.month_field % name) d = data.get(self.day_field % name) if y == m == d == "0": return None if y and m and d: if settings.USE_L10N: input_format = get_format('DATE_INPUT_FORMATS')[0] try: date_value =, int(m), int(d)) except ValueError: return '%s-%s-%s' % (y, m, d) else: date_value = datetime_safe.new_date(date_value) return date_value.strftime(input_format) else: return '%s-%s-%s' % (y, m, d) return data.get(name, None) def create_select(self, name, field, value, val, choices): if 'id' in self.attrs: id_ = self.attrs['id'] else: id_ = 'id_%s' % name if not (self.required and val): choices.insert(0, self.none_value) local_attrs = self.build_attrs(id=field % id_) s = Select(choices=choices) select_html = s.render(field % name, val, local_attrs) return select_html
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