1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
"""
Extra HTML Widget classes
"""
import datetime
import re
from django.forms.widgets import Widget, Select
from django.utils.dates import MONTHS
from django.utils.safestring import mark_safe
__all__ = ('SelectDateWidget',)
RE_DATE = re.compile(r'(\d{4})-(\d\d?)-(\d\d?)$')
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.
"""
month_field = '%s_month'
day_field = '%s_day'
year_field = '%s_year'
def __init__(self, attrs=None, years=None):
# years is an optional list/tuple of years to use in the "year" select box.
self.attrs = attrs or {}
if years:
self.years = years
else:
this_year = datetime.date.today().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, value.day
except AttributeError:
year_val = month_val = day_val = None
if isinstance(value, basestring):
match = RE_DATE.match(value)
if match:
year_val, month_val, day_val = [int(v) for v in match.groups()]
output = []
if 'id' in self.attrs:
id_ = self.attrs['id']
else:
id_ = 'id_%s' % name
month_choices = MONTHS.items()
month_choices.sort()
local_attrs = self.build_attrs(id=self.month_field % id_)
select_html = Select(choices=month_choices).render(self.month_field % name, month_val, local_attrs)
output.append(select_html)
day_choices = [(i, i) for i in range(1, 32)]
local_attrs['id'] = self.day_field % id_
select_html = Select(choices=day_choices).render(self.day_field % name, day_val, local_attrs)
output.append(select_html)
year_choices = [(i, i) for i in self.years]
local_attrs['id'] = self.year_field % id_
select_html = Select(choices=year_choices).render(self.year_field % name, year_val, local_attrs)
output.append(select_html)
return mark_safe(u'\n'.join(output))
def id_for_label(self, id_):
return '%s_month' % id_
id_for_label = classmethod(id_for_label)
def value_from_datadict(self, data, files, name):
y, m, d = data.get(self.year_field % name), data.get(self.month_field % name), data.get(self.day_field % name)
if y and m and d:
return '%s-%s-%s' % (y, m, d)
return data.get(name, None)
|
