Yii jui date picker format - yii2

Question

I am using the following code in my _form file for yii\jui\DatePicker, on date selection it is showing the date format properly. In gridview the data rendered is OK.
But when I open the record for update, the format shown is yyyy-mm-dd, I want to show the same as dd-mm-yyyy
<?= $form->field($model, 'birth_date')->widget(DatePicker::className(),
[
'language' => 'en',
'clientOptions' =>[
'dateFormat' => 'd-m-yy',
'language' => 'US',
'country' => 'IN',
'showAnim'=>'fold',
'yearRange' => 'c-25:c+0',
'changeMonth'=> true,
'changeYear'=> true,
'autoSize'=>true,
'showOn'=> "button",
//'buttonImage'=> "images/calendar.gif",
'htmlOptions'=>[
'style'=>'width:80px;',
'font-weight'=>'x-small',
],]]) ?>
Thanks.

Answer 1

You can format date in your controller, then render the view. In controller:
$model->birth_date=Yii::$app->formatter->asDate($model->birth_date, "dd-mm-yyyy");
Take a look at Yii2's official formatter guide here.

Answer 2

You can Generalize the date format
class Setup {
const DATE_FORMAT = 'php:Y-m-d';
const DATETIME_FORMAT = 'php:Y-m-d H:i:s';
const TIME_FORMAT = 'php:H:i:s';
public static function convert($dateStr, $type='date', $format = null) {
if ($type === 'datetime') {
$fmt = ($format == null) ? self::DATETIME_FORMAT : $format;
}
elseif ($type === 'time') {
$fmt = ($format == null) ? self::TIME_FORMAT : $format;
}
else {
$fmt = ($format == null) ? self::DATE_FORMAT : $format;
}
return \Yii::$app->formatter->asDate($dateStr, $fmt);
}
}
Then anywhere else (like controller/model) you can access this function to convert any input date/time string for saving to database.
$model->birth_date = Setup::convert($model->dateAttr);
$model->birth_date = Setup::convert($model->datetimeAttr, 'datetime');