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Hello and thanks for looking my question.

On Drupal 7 I use this hook hook_file_presave() for change file name.

function mymodule_file_presave($file) {
  $parts = pathinfo($file->filename);
  $file->filename = $file->uid . $file->timestamp . '.' . $parts['extension'];
}

But how to do it on Drupal 8.1.x? Programmatically or module ways or something else?

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1 Answer 1

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hook_entity_presave?

Description from the DocBlock:

Act on an entity before it is created or updated.
You can get the original entity object from $entity->original when it is an update of the entity.

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  • Yes, thx for answer. But how to write code with this hook, like on my first post? Any example make me understand.
    – Vic Shóstak
    Jun 2, 2016 at 9:40
  • 1
    Try function yourModule_entity_presave(Drupal\Core\Entity\EntityInterface $entity) {drupal_set_message('<pre>'.print_r(array_keys((array) $entity),1).'</pre>');} and let me know the result.
    – Itang Sanjana
    Jun 2, 2016 at 11:53
  • this code return error on white screen
    – Vic Shóstak
    Jun 14, 2016 at 6:02
  • I've done it for Drupal 9, let me know if you're interested in the answer for v 9
    – Cortex
    Feb 9, 2021 at 7:00

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