DESC最后用NULLS排序？

Question

如何在我的列表中放置NULLS来设置默认的DESC排序？我的代码的一部分负责排序：

$dataProvider->sort->defaultOrder = ['created_at' => SORT_DESC];
$dataProvider->sort->attributes['created_at'] = [
    'asc' => [Production::tableName().'.created_at' => SORT_ASC],
    'desc' => [Production::tableName().'.created_at' => SORT_DESC]
];

此致

Answer 1

试试这个：

$dataProvider->sort->attributes['created_at'] = [
    'asc' => [new Expression(Production::tableName().'.created_at ASC NULLS FIRST')],
    'desc' => [new Expression(Production::tableName().'.created_at DESC NULLS LAST')]
];
$dataProvider->sort->defaultOrder = ['created_at' => SORT_DESC];