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I'm trying to alter the value of entity text fields upon node save, even the custom-made fields

so far I've managed to do that with the title and default body field but not with a custom field, I'm trying to target any field that might be a text field, here's my code:

function MODULENAME_entity_presave(Drupal\Core\Entity\EntityInterface $entity) { $replacement_pattern = array("/a/", "/b/"); $replacement = array("c", "d"); /* Check whether it's a node */ if ($entity instanceof \Drupal\node\NodeInterface) { // Node title $nodeTitle = $entity->getTitle(); $entity->setTitle(preg_replace($replacement_pattern, $replacement , $nodeTitle)); // Body main if(!empty($entity->body->value)) { $entity->body->value = preg_replace($replacement_pattern, $replacement , $entity->body->value); } // Body Summary if(!empty($entity->body->summary)) { $entity->body->summary = preg_replace($replacement_pattern, $replacement , $entity->body->summary); } } }
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Another approach by checking field name. I think this will get you the "custom" field part, but not the "all" fields part:

MYMODULE.module:

use Drupal\Core\Entity\EntityInterface; function MYMODULE_node_presave(EntityInterface $entity) { if ($entity->hasField('field_name')) { $entity->get('field_name')->value = preg_replace( $toReplace, $newText, $entity->get('field_name')->value ); } }

But this only checks for fields of that name. I am also looking for a way to alter the value of a ckeditor/text field by testing field type instead of field name.

I would have hoped setting the field name value to something like text_long would have worked. This is a base field hook suggestion, but I am not having any luck at this time.

To add to the use case, it would be nice to alter ckeditor/text fields whether attached directly to the node, or via a Paragraph type.

The answer in the comment link above is helpful, but I have not succeeded in implementation.

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