关于我的第二个问题,这是解决方案。扩展类:
from django import forms
from django.utils.encoding import force_unicode
from itertools import chain
from django.utils.html import escape, conditional_escape
class Select(forms.Select):
"""
A subclass of Select that adds the possibility to define additional
properties on options.
It works as Select, except that the ``choices`` parameter takes a list of
3 elements tuples containing ``(value, label, attrs)``, where ``attrs``
is a dict containing the additional attributes of the option.
"""
def render_options(self, choices, selected_choices):
def render_option(option_value, option_label, attrs):
option_value = force_unicode(option_value)
selected_html = (option_value in selected_choices) and u' selected="selected"' or ''
attrs_html = []
for k, v in attrs.items():
attrs_html.append('%s="%s"' % (k, escape(v)))
if attrs_html:
attrs_html = " " + " ".join(attrs_html)
else:
attrs_html = ""
return u'<option value="{0}"{1}{2}>{3}</option>'.format(
escape(option_value), selected_html, attrs_html,
conditional_escape(force_unicode(option_label))
)
'''
return u'<option value="%s"%s%s>%s</option>' % (
escape(option_value), selected_html, attrs_html,
conditional_escape(force_unicode(option_label)))
'''
# Normalize to strings.
selected_choices = set([force_unicode(v) for v in selected_choices])
output = []
for option_value, option_label, option_attrs in chain(self.choices, choices):
if isinstance(option_label, (list, tuple)):
output.append(u'<optgroup label="%s">' % escape(force_unicode(option_value)))
for option in option_label:
output.append(render_option(*option))
output.append(u'</optgroup>')
else:
output.append(render_option(option_value, option_label,
option_attrs))
return u'\n'.join(output)
class SelectMultiple(forms.SelectMultiple, Select):
pass
例子:
OPTIONS = [
["AUT", "Australia", {'selected':'selected', 'data-index':'1'}],
["DEU", "Germany", {'selected':'selected'}],
["NLD", "Neitherlands", {'selected':'selected'}],
["USA", "United States", {}]
]