Yii 2.0: Default value for dropDownList

Yii 2.0 General Discussions
1

Hello,

I’m newbie in Yii 2.0, how to set a default value in a dropdown?

Code:




                    <?php

                    //Select Don vi ban hanh, if pid null default select is cid

                    $pid = \app\models\User::findIdentity(Yii::$app->user->id)->pid;

                    if ($pid) {

                        $dv = \app\models\Phong::findOne($pid)->tp_viet_tat;

                    } else {

                       $dv = app\models\CongTy::findOne(\app\models\User::findIdentity(Yii::$app->user->id)->cid)->ten_viet_tat;

                    }

                    ?>

                    <?= $form->field($model, 'don_vi_ban_hanh')->dropDownList($model->selectDonViBanHanh(), [

                        'prompt' => '-Vui lòng chọn-',

                        'options' => [$dv => ['selected' => true]]

                    ]);?>

but it not work :(