Trait kartik\grid\controllers\GridEditedRowTrait

GridEditedRowTrait implements the specific actions and methods that can be used in any of controllers to enable the Krajee GridView edited row functionality. You must define a property called editedRowConfig in your controller and use this trait. The property must match the kartik\grid\GridView::$editedRowConfig property specification.

This trait is used by kartik\grid\controllers\GridEditedRowController which can alternatively be extended by your own controller classes.

For example:

class BookController extends \yii\web\Controller {
  use \kartik\grid\controllers\GridEditedRowTrait;

  // @var array the configuration for the row being currently edited
  public $editedRowConfig = [
    'rowIdGetParam' => 'row',
    'gridIdGetParam' => 'grid',
    'gridFiltersSessionParam' => 'kvGridFiltersCache',
    'highlightClass' => 'kv-row-edit-highlight',
  ];

  // your model UPDATE action
  public function actionUpdate($id) {
    $model = $this->findModel($id);
    if ($model->load(Yii::$app->request->post()) && $model->save()) {
      Yii::$app->session->setFlash('success', "Updated book # {$id} successfully.");
      return $this->redirectIndex($id); // USE this for redirecting to edited row
    } else {
      return $this->render('update', ['model' => $model, ]);
    }
  }
}

On your view file (for update or view) - you can create a Cancel button to go back to the edited row, using the back action. For example,

   use yii\helpers\Html;
   echo Html::a('Cancel', ['back', 'id' => $model->id], ['class' => 'btn btn-primary', 'title' => 'Go back']);

See also [[kartik\grid\controllers\GridEditedRowController]].