+
+/**
+ * Remove the stale 'handler_submit' setting for entity_reference fields.
+ */
+function field_post_update_remove_handler_submit_setting() {
+ $config = \Drupal::configFactory();
+ /** @var \Drupal\Core\Field\FieldTypePluginManager $field_type_manager */
+ $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
+
+ // Iterate on all field configs.
+ foreach ($config->listAll('field.field.') as $field_id) {
+ $field = $config->getEditable($field_id);
+ $class = $field_type_manager->getPluginClass($field->get('field_type'));
+
+ // Deal only with entity reference fields and descendants.
+ if ($class === EntityReferenceItem::class || is_subclass_of($class, EntityReferenceItem::class)) {
+ if ($field->get('settings.handler_submit')) {
+ // Remove 'handler_settings' from settings.
+ $field->clear('settings.handler_submit')->save();
+ }
+ }
+ }
+}