How to show previously uploaded files in fileinput()?

Question

Yii

How to implement so that in fileinput(), if the file was previously uploaded to the server, Now it constantly shows near the button the file is not selected and if left and saved, it will be deleted if saved
Tried to do fileinput(['value' => $model- >img). But that won't help
In the table model

class Zakaz extends ActiveRecord
{
    public $file;
public function rules()
    {
        return [
[['file'], 'file', 'skipOnEmpty' => true],
            [['img'], 'string', 'max' => 100],
}

In the shape of

<?php $form = ActiveForm::begin([
        'options' => ['enctype' => 'multipart/form-data']
    ]); ?>
<?= $form->field($model, 'file')->fileInput() ?>
<div class="form-group">
        <?= Html::submitButton($model->isNewRecord ? 'Создать' : 'Сохранить', ['class' => $model->isNewRecord ? 'btn btn-success' : 'btn btn-primary']) ?>
    </div>
<?php ActiveForm::end(); ?>

And in the controller

public function actionUpdate($id)
    {
        $model = $this->findModel($id);

        if ($model->load(Yii::$app->request->post())) {
            $model->file = UploadedFile::getInstance($model, 'file');
            if(isset($model->file)){
            $model->file->saveAs('attachment/'.$model->id_zakaz.'.'.$model->file->extension);
            $model->img = $model->id_zakaz.'.'.$model->file->extension;}
            
            $model->save();

            return $this->redirect(['view', 'id' => $model->id_zakaz]);
        } else {
            return $this->render('update', [
                'model' => $model,
            ]);
        }
    }

Answer 1

There is no way you can do this in input. Here you need to either display an inscription next to it that the file has already been uploaded, or hide the input if you do not want to give the opportunity to re-upload the file.

Answer 2

public function actionUpdate($id)
{
$model = $this->findModel($id);
$image = $model->file;
if ($model->load(Yii::$app->request->post())) {
$model->file = UploadedFile::getInstance($model, 'file');
if(isset($model->file)){
$model->file->saveAs('attachment/'.$model->id_zakaz.'.'.$model->file->extension);
$model->img = $model->id_zakaz.'.'.$model->file->extension;}
$model->save();
if (empty($model->file) && $image) {
$model->file = $image;
$model->save();
return $this->redirect(['view', 'id' => $model->id_zakaz]);
} else {
return $this->render('update', [
'model' => $model,
]);
}
}