Customize/override the “node has been created/updated” status message on Drupal 9

The last few years I have been working with Drupal so I’ve been using a lot more the provided tools for support than medium, but as I hope to save some of the snippets for myself anyway (that’s the idea of this blog really), here’s a comeback!

This one I want to share is really simple but it took me some time to find the right moment to hook on the process. At first I thought that a `hook_entity_update` would do it, but the status message is set right after it.

I’ve also tried hook_preprocess_status_message with no luck.

Here’s how I got it working:

1. In a hook form alter, add a custom submit callback.

/**
 * Implements hook_form_alter().
 */
function yourmodule_form_alter(&$form, &$form_state, $form_id) {
  $forms = [
    'node_node_1_edit_form',
    'node_node_2_edit_form',
    'node_node_3_edit_form',
  ];
  if (in_array($form_id, $forms)) {
    // Adding custom callback to customize status message.
    $form['actions']['submit']['#submit'][] =       '_post_node_save_callback';
  }
}

2. In your submit callback, delete the setup messages by type and yours.

use Drupal\Core\Entity\EntityForm;
/**
 * Custom callback to customize status message.
 */
function _post_node_save_callback($form, &$form_state) {
  $form_object = $form_state->getFormObject();
  if ($form_object instanceof EntityForm) {
    $node = $form_object->getEntity();
    $args = ['%title' => $node->toLink()->toString()];
    \Drupal::messenger()->deleteByType('status');
    \Drupal::messenger()->addStatus(t('%title has been updated.', $args));
 
  }
}

In my case, the node title had the same name as the node type, so I just need to remove the @type from the string.