Unknown Method SqlDataProvider::isAttributeRequired()

Hi all,
I’m using SqlDataProvider to obtain 95 records from a table. This works fine for gridview in my index file. When I select update on a particular ‘id’ the error:

Unknown Method – yii\base\UnknownMethodException Calling unknown method: yii\data\SqlDataProvider::isAttributeRequired()

** Note: I’ve printed $model from the update view file & it renders the following record info correctly:

yii\data\SqlDataProvider Object
(
[db] => yii\db\Connection Object
(
[dsn] => mysql:host=l

Controller:

public function actionUpdate($id)
{

    $this->layout = 'accessLayout';
    $searchModel = new CarriersSearch();
    $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

            $sql = 'SELECT *
     FROM carriers
     WHERE (Latitude < 37.760004 + 1)
     AND (Longitude < -85.712624 + 1)
     AND (Latitude > 37.760004 - 1)
     AND (Longitude > -85.712624 - 1)         ';

     $sqlProvider = new SqlDataProvider([
        'sql' => $sql,
    ]);

    $model = $sqlProvider->getModels();

    $model = $this->findModel($id);


    if ($model->load(Yii::$app->request->post()) && $model->save()) {
        return $this->redirect(['view', 'id' => $model->ID]);
    }


    return $this->render('update', [
        'model' => $model,
        'sqlProvider' => $sqlProvider,

Update View:

<?= $form->field($model, 'ExecutiveGender')->textInput(['class' => 'form-control class-content-title_series', 'placeholder' => 'ExecutiveGender', 'disabled' => false])->label(false) ?>
</div>

Any light shed on this situation will be greatly appreciated.

Thanks,
lwood

Probably you are wrongly referring to $sqlProvider in your view script. I mean, you are setting $sqlProvider as a parameter which must be a Model instance, because isAttributeRequired() is a method of Model class.