How to display value from db to input yii2?

Question

Yii

There is a form:

<?php $f = ActiveForm::begin(['options' => ['id' => 'contact', 'class' => 'floating-labels m-t-40']]); ?>
    <?php echo $f->field($form, 'tel') ?>
    <?php echo $f->field($form, 'skype') ?>
    <?php echo $f->field($form, 'whatsapp') ?>
    <?php echo $f->field($form, 'index') ?>
    <?php echo Html::submitButton('Сохранить', ['class' => 'btn btn-danger']); ?>
<?php ActiveForm::end(); ?>

The form model itself:

<?php
namespace app\modules\dashboard\models;

use Yii;
use yii\db\ActiveRecord;
/**
 *
 */
class ContactForm extends ActiveRecord
{

  public static function tableName() {
    return 'contact';
  }
  
  public function rules()
  {
    return [
      [['tel', 'skype', 'whatsapp', 'index'], 'trim'],
      [['tel', 'skype'], 'required'],
    ];
  }

  public function attributeLabels()
  {
    return [
      'tel' => 'Номер телефон',
      'skype' => 'Логин Skype',
      'whatsapp' => 'Номер whatsapp',
      'index' => 'Ваш индекс',
    ];
  }

}

?>

In my controller I have:

public function actionProfile() {
      $id = Yii::$app->user->identity->id;
      $user = ContactForm::find()->where(['=', 'user_id', $id])->one();
      $form = new ContactForm();
      if ($form->load(Yii::$app->request->post()) && $form->validate()) {
        $id = Yii::$app->user->identity->id;
        $user = ContactForm::find()->where(['=', 'user_id', $id])->one();
        $user->tel = Html::encode($form->tel);
        $user->skype = Html::encode($form->skype);
        $user->whatsapp = Html::encode($form->whatsapp);
        $user->index = Html::encode($form->index);
        $user->save();
        return $this->refresh();
      }else{
        return $this->render('profile', compact('form', 'user'));
      }
    }

Actually the question is: how to make the input fields automatically filled with data from the database?
Tried to do in the form

<?php echo $f->field($form, 'tel')->textInput() ?>

but nothing happens.

Answer 1

<?php echo $f->field($user, 'tel') ?>
Isn't that how it should be?
upd: You fill in the $user model, and bind the input from the $form model, which is empty unless a POST is passed to fill it.

Answer 2

$form = new ContactForm();
$form->tel = $user->tel;

take the logic to the form model, save everything there. And why the form cannot know about the user?
It would be nice:

$id = Yii::$app->user->identity->id;
$user = ContactForm::find()->where(['user_id' => $id])->one();
$form = new ContactForm($user);
if ($form->load(Yii::$app->request->post()) && $form->validate() && $form->save()) {
    return $this->refresh();
}else{
    return $this->render('profile', compact('form', 'user'));
}

and in the constructor or init would make default field values ​​by $user