models.py 文件源码

def __init__(self, queryset, cache_choices=False, required=True,
                 widget=None, label=None, initial=None,
                 help_text='', *args, **kwargs):
        super(ModelMultipleChoiceField, self).__init__(queryset, None,
            cache_choices, required, widget, label, initial, help_text,
            *args, **kwargs)
        # Remove this in Django 1.8
        if isinstance(self.widget, SelectMultiple) and not isinstance(self.widget, CheckboxSelectMultiple):
            msg = _('Hold down "Control", or "Command" on a Mac, to select more than one.')
            self.help_text = string_concat(self.help_text, ' ', msg)