Fixed #7195 -- Fixed the validation of MultipleChoice fields so that they can

import copy

from itertools import chain

from django.conf import settings

from django.utils.datastructures import MultiValueDict

from django.utils.datastructures import MultiValueDict, MergeDict

from django.utils.html import escape, conditional_escape

from django.utils.translation import ugettext

from django.utils.encoding import StrAndUnicode, force_unicode

            for v in value]))

    def value_from_datadict(self, data, files, name):

        if isinstance(data, MultiValueDict):

        if isinstance(data, (MultiValueDict, MergeDict)):

            return data.getlist(name)

        return data.get(name, None)

        return mark_safe(u'\n'.join(output))

    def value_from_datadict(self, data, files, name):

        if isinstance(data, MultiValueDict):

        if isinstance(data, (MultiValueDict, MergeDict)):

            return data.getlist(name)

        return data.get(name, None)

<li><label for="composers_id_1"><input type="checkbox" name="composers" value="P" id="composers_id_1" /> Paul McCartney</label></li>

</ul>

Data for a MultipleChoiceField should be a list. QueryDict and MultiValueDict

conveniently work with this.

Data for a MultipleChoiceField should be a list. QueryDict, MultiValueDict and

MergeDict (when created as a merge of MultiValueDicts) conveniently work with

this.

>>> data = {'name': 'Yesterday', 'composers': ['J', 'P']}

>>> f = SongForm(data)

>>> f.errors

>>> f = SongForm(data)

>>> f.errors

{}

>>> from django.utils.datastructures import MergeDict

>>> data = MergeDict(MultiValueDict(dict(name=['Yesterday'], composers=['J', 'P'])))

>>> f = SongForm(data)

>>> f.errors

{}

The MultipleHiddenInput widget renders multiple values as hidden fields.

>>> class SongFormHidden(Form):