Yii2 Gridview bulk action using checkbox column. How to properly create checkbox column in gridview for bulk actions

Yii2 Gridview bulk action using checkbox column. How to properly create checkbox column in gridview for bulk actions

To add a CheckboxColumn to the yii\grid\GridView, add it to the columns configuration as follows:

'columns' => [
    // ...
    [
        'class' => 'yii\grid\CheckboxColumn',
        // you may configure additional properties here
    ],
]

This is the view:

<?=Html::beginForm(['controller/bulk'],'post');?>
<?=Html::dropDownList('action','',[''=>'Mark selected as: ','c'=>'Confirmed','nc'=>'No Confirmed'],['class'=>'dropdown',])?>
<?=Html::submitButton('Send', ['class' => 'btn btn-info',]);?>
<?=GridView::widget([
'dataProvider' => $dataProvider,
'columns' => [
['class' => 'yii\grid\CheckboxColumn'],
'id',
],
]); ?>
<?= Html::endForm();?>

This is the controller:

public function actionBulk(){
    $action=Yii::$app->request->post('action');
    $selection=(array)Yii::$app->request->post('selection');//typecasting
    foreach($selection as $id){
        $e=Evento::findOne((int)$id);//make a typecasting
        //do your stuff
        $e->save();
    }
    }