Silverstripe File relation in ModelAdmin doesnt publish

Question

Im using SilverStripe4 and the ModelAdmin to manage DataObjects.

The DataObject has a has_one on File. Everything works so far but on frontend controller the File

Answer 1

You can add the following to your DataObject:

private static $owns = ['FileRelationName'];

Example with a relation:

private static $has_one = ['File' => File::class];
private static $owns = ['File'];

Any related object that is being declared as "owned" in this way will be published with the DataObject itself.