Yii2 SqlDataProvider筛选器

我正在努力解决如何在我的网格中使用一个过滤器，当它是从

目前，我的模型是这样工作的：

 $sql = 'SELECT * FROM my_table';
 $provider = new SqlDataProvider([
       'sql' => $sql,
       'params' => [':start' => $param1, ':end' => $param2],
       'totalCount' => $count,
       'pagination' => [
         'pageSize' => 100
        ],
     ]);
return $provider;

当没有活动记录时，应如何执行此操作？搜索模型似乎都基于AR并调用控制器：

$searchModel->search(Yii::$app->request->queryParams);

其中$searchModel函数的开头如下：

  public function search($params)
 {
    $query = myTable::find();

    // add conditions that should always apply here

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

$query = new Query;
$query->select('*')
    ->from('my_table');

// add conditions that should always apply here

$dataProvider = new SqlDataProvider([
    'sql' => $query->createCommand()->sql,
    'pagination' => [
        'pageSize' => 100
    ],
]);

我已经开始将search（）函数更改为更像这样的函数，但不确定是否正确：

$query = new Query;
    $query->select('*')
          ->from('my_table');

    // add conditions that should always apply here

    $dataProvider = new SqlDataProvider([
      'sql' => $query,
      'pagination' => [
        'pageSize' => 100
       ],
    ]);

因为它与

preg_match（）要求参数2为字符串，对象为给定值

对于一个模型的activeRecord（由gii生成），您有一个包含搜索函数的modelSearch.php

在本例中是用户模型serach

 /**
 * @param $params
 * @return ActiveDataProvider
 */
public function search($params)
{
    $query = $this->finder->getUserQuery();

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

    if (!($this->load($params) && $this->validate())) {
        return $dataProvider;
    }

    if ($this->created_at !== null) {
        $date = strtotime($this->created_at);
        $query->andFilterWhere(['between', 'created_at', $date, $date + 3600 * 24]);
    }

    $query->andFilterWhere(['like', 'username', $this->username])
        ->andFilterWhere(['like', 'email', $this->email])
        ->andFilterWhere(['registration_ip' => $this->registration_ip]);

    return $dataProvider;
}

过滤器功能通过以下各项的适当组合执行：

 $query->andFilterWhere(....) 

每一项都与正确的列名和参数变量有关，例如：

$query->andFilterWhere(['like', 'username', $this->username]);

如果您的模型或数据提供者需要类似的行为，您可以重复类似的模式

$query = new Query;
$query->select('*')
      ->from('my_table');
$query->andFilterWhere('start', $param1);

---

对于

SqlDataProvider

，您需要提供一个SQL字符串。在这里，您给出了一个查询对象，但您可以得到如下SQL：

  public function search($params)
 {
    $query = myTable::find();

    // add conditions that should always apply here

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

$query = new Query;
$query->select('*')
    ->from('my_table');

// add conditions that should always apply here

$dataProvider = new SqlDataProvider([
    'sql' => $query->createCommand()->sql,
    'pagination' => [
        'pageSize' => 100
    ],
]);

---

谢谢，我刚弄明白