widgets.py 文件源码

def create_select(self, name, field, value, val, choices):
        if 'id' in self.attrs:
            id_ = self.attrs['id']
        else:
            id_ = 'id_%s' % name
        if not (self.required and val):
            choices.insert(0, self.none_value)
        local_attrs = self.build_attrs(id=field % id_)
        s = Select(choices=choices)
        select_html = s.render(field % name, val, local_attrs)
        return select_html