When setting #required_error on a select form widget using the form alter API, core doesn't implement custom error message.
Problem is that core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/BooleanCheckboxWidget.php doesn't consider the #required_errorform array attribute set by the form alter.
Following example helps to reproduce the issue:
Add a new required field to User Account name "type" of type List (text)
Alter the form and set the custom required error message into #required_error:
<?php
function my_module_form_user_form_alter(&$form, FormStateInterface $form_state) {
$form['field_type']['widget']['#required_error'] = t('CUSTOM REQUIRED ERROR MESSAGE');
}
?>
Whenever above form alter is executed, custom error message set in #required_error is getting ignored by OptionsWidgetBase.php's validateElement method.
First check if any value is being set in #required_error attribute.
If value is not set, then display the default error message. See issue
3060626
🐛
OptionsWidgetBase doesn't respect #required_error
Fixed
Needs review
N/A
N/A
N/A
N/A
Active
10.3 ✨
Last updated
Changes are made on on 11.x (our main development branch) first, and are then back ported as needed according to our policies.