I have custom options element implementation that fetches valid options from an external storage. I used the prepare() method (what else I should have used for this?) to prepopulate the #options element key from the external storage. The webform element works as expected but the prepopulate feature does not work on it because it is not called by \Drupal\webform\WebformSubmissionForm::checkPrepopulateDataValid()
final class RemoteCheckboxes extends Checkboxes {
public function prepare(array &$element, WebformSubmissionInterface $webform_submission = NULL): void {
$element['#options'] = FetchDataFromExternalSource::call();
}
}
Call prepare() on options elements in the above mentioned function.
Needs review
6.2
Code
Could we check that $element['#options'] is empty before calling $element_plugin->prepare($element);?
We could, but should not prepare() be called unconditionally in this layer as well?