我认为有合适的解决方案。配置yii\data\Sort对象：

$dataProvider = new ActiveDataProvider([
     'query' => $query,
     'sort'=> ['defaultOrder' => ['topic_order' => SORT_ASC]],
 ]);

Official doc link

或者

$dataProvider->setSort([
        'defaultOrder' => ['topic_order'=>SORT_DESC],
        'attributes' => [...

defaultOrder包含一个数组，其中key是列名，value是SORT_DESC或SORT_ASC，这就是下面代码不起作用的原因。

$dataProvider = new ActiveDataProvider([
        'query' => $query,
        'sort' => ['defaultOrder'=>'topic_order asc']
    ]);

正确的方式

$dataProvider = new ActiveDataProvider([
    'query' => $query,
    'sort' => [
        'defaultOrder' => [
            'topic_order' => SORT_ASC,
        ]
    ],
]);

注意：如果查询已经指定orderBy子句，一般使用者（透过排序组态）所提供的新排序指示将会附加到现有的orderBy子句。一般使用者（透过分页组态）的分页要求将会覆写任何现有的限制和位移子句。
您可以从Yii2 Guide of Data Provider中详细了解
通过在查询中传递Sort对象进行排序

$sort = new Sort([
        'attributes' => [
            'age',
            'name' => [
                'asc' => ['first_name' => SORT_ASC, 'last_name' => SORT_ASC],
                'desc' => ['first_name' => SORT_DESC, 'last_name' => SORT_DESC],
                'default' => SORT_DESC,
                'label' => 'Name',
            ],
        ],
    ]);

    $models = Article::find()
        ->where(['status' => 1])
        ->orderBy($sort->orders)
        ->all();

如果你有CRUD（索引），你需要为GridView，或者ListView，或者更多的控件设置默认排序...示例

public function actionIndex()
{
    $searchModel = new NewsSearch();
    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);
    // set default sorting
    $dataProvider->sort->defaultOrder = ['id' => SORT_DESC];

    return $this->render('index', [
        'searchModel' => $searchModel,
        'dataProvider' => $dataProvider,
    ]);
}

您需要添加

$dataProvider->sort->defaultOrder = ['id' => SORT_DESC];

试试这一个

$dataProvider = new ActiveDataProvider([
    'query' => $query,
]);

$sort = $dataProvider->getSort();

$sort->defaultOrder = ['id' => SORT_ASC];

$dataProvider->setSort($sort);

$dataProvider = new ActiveDataProvider([ 
    'query' => $query, 
    'sort'=> ['defaultOrder' => ['iUserId'=>SORT_ASC]] 
]);

如guide中所述，您必须通过配置数据提供者的排序属性来指定其排序行为，该属性对应于yii\data\Sort的配置

$dataProvider = new ActiveDataProvider([
         'query' => $query,
         'sort'=> ['defaultOrder' => ['topic_order' => SORT_ASC]],
     ]);

$modelProduct       =   new Product();
    $shop_id            =   (int)Yii::$app->user->identity->shop_id;

    $queryProduct       =   $modelProduct->find()
                            ->where(['product.shop_id'  => $shop_id]);

    $dataProviderProduct    =   new ActiveDataProvider([
                                    'query'         =>  $queryProduct,
                                     'pagination' => [ 'pageSize' => 10 ],
                                    'sort'=> ['defaultOrder' => ['id'=>SORT_DESC]]
                                ]);

您可以像这样修改搜索模型，

$dataProvider = new ActiveDataProvider([
        'query' => $query,
        'sort' => [
            'defaultOrder' => ['user_id ASC, document_id ASC']
        ]
    ]);