How to get Paragraph Changed Time?

Pipo Bizelli

4/20/24, 11:50 PM

I know how get User entity changed time ($user->getChangedTime()).
Node has the same value ($node->changed), but I need to get this changed time from a Paragraph.

When I try this method $paragraph->getChangedTime() (the value changed do not exists) i got this:

Error: Call to undefined method Drupal\paragraphs\Entity\Paragraph::getChangedTime() ...

I have this field in my User entity, and I need to know when this field is changed. Is there any way to achieve that?

130

1 + 2

hooks

4uk4

4/21/24, 6:32 AM

The Paragraph entity doesn't have a changed field. You need your own date field and fill it in a presave hook.

Hudri

4/21/24, 7:29 AM

Paragraphs (and all entity reference revision fields) are directly tied to their parent entity, AFAIK their revisioning is completely tied to the host too. If you save the host, a new revision of all paragraphs is created, so a changed timestamp doesn't really make sense here by architecture of the module. If you need a separate changed timestamp, Paragraphs is the wrong tool.

Score:0

Drupal

4uk4

4/21/24, 8:28 AM

You can add a date/time field to the paragraph type and fill in the current time if the paragraph is changed:

mymodule.module

<?php

use Drupal\paragraphs\ParagraphInterface;
use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\datetime\Plugin\Field\FieldType\DateTimeItemInterface;

/**
 * Implements hook_ENTITY_TYPE_presave() for paragraph entities.
 */
function mymodule_paragraph_presave(ParagraphInterface $paragraph) {
  if ($paragraph->getType() == 'my_paragraph_type') {
    if ($paragraph->isChanged()) {
      $paragraph->field_date->value = (new DrupalDateTime('now', DateTimeItemInterface::STORAGE_TIMEZONE))
        ->format(DateTimeItemInterface::DATETIME_STORAGE_FORMAT);
    }
  }
}

+ 2

Hudri

4/21/24, 10:48 AM

I did not knew something like `$paragraph->isChanged()` existed. Is this paragraphs specific or can this be used with other entities too?

4uk4

4/21/24, 11:23 AM

This is specific to paragraphs but it's basically the same as if you would compare with $entity->original. So you could define a custom changed time for the content of a specific field or a set of fields in any entity.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How to get Paragraph Changed Time?

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