Recursion when reading field in hook_entity_load

Question

Is there a preferred approach modifying values?

I need to modify a value when a node loads, but must use other values from the node. The code below causes recursion errors.

function zzzmodule_entity_load(array $entities, $entity_type_id) {

  foreach ($entities as $entity) {

    if ($entity_type_id === "node" && $entity->hasField('other_field')) {


      $t = $entity->title->value;
      $o = $entity->other_field->value;

      if (empty($o)) {

        $o2 = json_encode($t);

        $entity->set('other_field', $o2);
        $entity->save();
      }

    }

  }

}

Answer 1

Your code works just remove the $entity->save(); and it works i have tested it:

function zzzmodule_entity_load(array $entities, $entity_type_id) {
  foreach ($entities as $entity) {
    if ($entity_type_id === "node" && $entity->hasField('other_field')) {
      $t = $entity->title->value;
      $o = $entity->other_field->value;
      if (empty($o)) {
        $o2 = json_encode($t);
        $entity->set('other_field', $o2);
      }
    }
  }
}