1
当使用GridView控件试图添加属性filterPosition未定义类常量“FILTER_POS_FOOTER”
<?= GridView::widget([
'dataProvider' => $dataProvider,
'filterModel' => $searchModel,
'filterPosition'=>self::FILTER_POS_FOOTER,
..........
?>
但它显示为未定义类常量“FILTER_POS_FOOTER”