How to save the value of a text field after submitting to a form in yii2 framework?

Question

Yii

How to save the value of a text field after submitting to a form in yii2 framework?
In the field, enter the value -

After sending to the form, as usual, there is a void in the field

How to do that after submitting the form, there is data left.
Code
file main.php

$form = ActiveForm::begin(); 
$form->field($model, 'price')->textInput(['value' => $model->price,'maxlength' => true])
ActiveForm::end();

public function actionIndex()
    {
    $model = new Product();

 if($model->price){
         $price = $model->price;
      
       $query = Product::find()->where(['price' => $price]);
       }

 return $this->render('index', compact('hits','pages','model'),[
            'dataProvider' => $dataProvider,]);

Answer 1

You need to upload the entered data in the form:$model->load(Yii::$app->request->post)

Answer 2

You receive a product-model from the form.
Load it in the action into the model, search, etc.
But! You do not give back loaded, apparently.
I don't like the compact function.