Python django.forms 模块，SelectMultiple() 实例源码

def init_chosen_widget(field_items, disable_help_text=True):
    """
    Add ``.chosen-widget`` html class attribute to all fields of type ``Select`` or ``SelectMultiple``.

    :param field_items: Django field items
    :param bool disable_help_text: Disable the fields help text. Default: True
    """
    for name, field in field_items:
        if isinstance(field.widget, SelectMultiple) or isinstance(field.widget, Select):
            field.widget.attrs['class'] = 'chosen-widget'
            # field.widget.attrs['style'] = 'width: 100%;'
            if disable_help_text:
                field.help_text = None

def __init__(self, world, sector, *args, **kwargs):
        super(attackform, self).__init__(*args, **kwargs)
        query = world.controlled_fleets.all().exclude(sector='hangar').exclude(sector='warping')
        query = query.filter(sector=sector)
        exclude_list = []
        for f in query:
            if f.power() == 0 or f.powermodifiers() == 0:
                exclude_list.append(f.pk)
        for pk in exclude_list:
            query = query.exclude(pk=pk)

        self.fields['fleets'] = forms.ModelMultipleChoiceField(queryset=query, widget=forms.SelectMultiple(
            attrs={'style': 'color: black; background-color: white; min-width: 80px;'}))

def value_from_datadict(self, data, files, name):
        from django.utils.datastructures import MultiValueDict
        if isinstance(data, MultiValueDict):
            # Normally, we'd want a list here, which is what we get from the
            # SelectMultiple superclass, but the SimpleArrayField expects to
            # get a delimited string, so we're doing a little extra work.
            return self.delimiter.join(data.getlist(name))
        return data.get(name, None)

def value_from_datadict(self, data, files, name):
        if isinstance(data, MultiValueDict):
            # Normally, we'd want a list here, which is what we get from the
            # SelectMultiple superclass, but the SimpleArrayField expects to
            # get a delimited string, so we're doing a little extra work.
            array = self.delimiter.join(data.getlist(name))
            return array
        return data.get(name, None)

def __init__(self, null_option=None, *args, **kwargs):
        self.null_option = null_option
        if 'required' not in kwargs:
            kwargs['required'] = False
        if 'widget' not in kwargs:
            kwargs['widget'] = forms.SelectMultiple(attrs={'size': 6})
        super(FilterChoiceFieldMixin, self).__init__(*args, **kwargs)

def __init__(self, *args, **kwargs):
        super(DualListField, self).__init__(*args, **kwargs)

        self.widget = SelectMultiple(attrs={'class': 'duallistbox'})