Form : Re-insert Selected File When Validation-Error

Need Help
1

Hi,

I have a form which accepts text and files. After submitting the form, if the validation fails, the previously selected file is not re-selected.

In debug, here is what I receive from the form

// array
'DocumentIDs' => [
	(int) 0 => [
		'document' => object(Laminas\Diactoros\UploadedFile) id:3 {
			private clientFilename => 'Pebble-195x195-1.jpg'
			private clientMediaType => 'image/jpeg'
			private error => (int) 0
			private file => '/tmp/php4uZD8N'
			private moved => false
			private size => (int) 4434
			private stream => null
		},
	],
],

If it fails at validation, the entity will contain the file (Diactoros)

// entity
object(App\Model\Entity\Recipient) id:0 {
	....
	'DocumentIDs' => [
		(int) 0 => [
			'document' => object(Laminas\Diactoros\UploadedFile) id:66 {
				private clientFilename => 'Pebble-195x195-1.jpg'
				private clientMediaType => 'image/jpeg'
				private error => (int) 0
				private file => '/tmp/php4uZD8N'
				private moved => false
				private size => (int) 4434
				private stream => null
			},
		],
	]
}

All the other data in the form populates correctly, except the file. Here is the data returned to the form debug($this), which shows the file is empty

// from debug($this).  document is empty
protected request => object(Cake\Http\ServerRequest) id:115 {
	trustProxy => false
	protected params => [ ]
	protected data => [
		'DocumentIDs' => [
			(int) 0 => [
			'document' => object(Laminas\Diactoros\UploadedFile) id: 111 {},
			],
		],
	
	....

How do I insert back the file (Diactoros) into the form when validation fails ?