Same name and namespace in other branches

1. 8.9.x core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php \Drupal\options\Plugin\Field\FieldType\ListIntegerItem::validateAllowedValue()
2. 10 core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php \Drupal\options\Plugin\Field\FieldType\ListIntegerItem::validateAllowedValue()
3. 11.x core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php \Drupal\options\Plugin\Field\FieldType\ListIntegerItem::validateAllowedValue()

Checks whether a candidate allowed value is valid.

Parameters

string $option: The option value entered by the user.

Return value

string The error message if the specified value is invalid, NULL otherwise.

Overrides ListItemBase::validateAllowedValue

File

core/modules/options/src/Plugin/Field/FieldType/ListIntegerItem.php, line 67

Class

ListIntegerItem

Plugin implementation of the 'list_integer' field type.

Namespace

Drupal\options\Plugin\Field\FieldType

Code

protected static function validateAllowedValue($option) {
    if (!preg_match('/^-?\\d+$/', $option)) {
        return new TranslatableMarkup('Allowed values list: keys must be integers.');
    }
}

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