None
          @view_config(renderer="templates/form.pt", name="dateparts")
    @demonstrate("Date Parts Widget")
    def dateparts(self):
        import datetime
        class Schema(colander.Schema):
            date = colander.SchemaNode(
                colander.Date(),
                widget=deform.widget.DatePartsWidget(),
                validator=colander.Range(
                    min=datetime.date(2010, 1, 1),
                    min_err=_("${val} is earlier than earliest date ${min}"),
                ),
            )
        schema = Schema()
        form = deform.Form(schema, buttons=("submit",))
        return self.render_form(form)