Problem/Motivation
If you set up a custom field of type email and save it with a value, it throws an error like this:
Error: Object of class Drupal\Core\Url could not be converted to string in array_unique() (line 73 of /.../web/core/lib/Drupal/Core/Template/AttributeArray.php)
Steps to reproduce
1. I set up a custom field on an article content type with 2 subfields (email and url, for testing purposes)
2. After saving the content with a value the error above is shown.
Proposed resolution
The problem is with this line:
'#url' => Url::fromUri('mailto:' . $value),
in the MailToFormatter.php.
I've temporarily changed the function like below, but its probably not the most optimal solution:
public function formatValue(FieldItemInterface $item, $value) {
// Check if email is valid.
if (empty($value) || !filter_var($value, FILTER_VALIDATE_EMAIL)) {
return ['#markup' => Html::escape($value ?: '')];
}
// Render as a plain HTML mailto link to avoid Url object issues.
$email = Html::escape($value);
return [
'#markup' => '<a href="mailto:' . $email . '">' . $email . '</a>',
];
}
Additionally removed the Drupal\Core\Url; class and added the use Drupal\Component\Utility\Html class.