load my imput file with file url in data base in update case

hi,

when i want to update my model, my form (imput file) return a empty field but the other field (not imput file) are loaded.

i am oblige to upload again the file if i want to update. in my example, in database my file field is $model->doc_file

<?= $form->field($model, ‘files[]’)->fileInput([‘multiple’ => true]) ?>

Thank