function OptionsWidgetBase::validateElement

Form validation handler for widget elements.

Parameters

array $element: The form element.

\Drupal\Core\Form\FormStateInterface $form_state: The form state.

File

core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsWidgetBase.php, line 69

Class

OptionsWidgetBase

Base class for the 'options_*' widgets.

Namespace

Code

public static function validateElement(array $element, FormStateInterface $form_state) {
    if ($element['#required'] && $element['#value'] == '_none') {
        $form_state->setError($element, t('@name field is required.', [
            '@name' => $element['#title'],
        ]));
    }
    // Massage submitted form values.
    // Drupal\Core\Field\WidgetBase::submit() expects values as
    // an array of values keyed by delta first, then by column, while our
    // widgets return the opposite.
    if (is_array($element['#value'])) {
        $values = array_values($element['#value']);
    }
    else {
        $values = [
            $element['#value'],
        ];
    }
    // Filter out the 'none' option. Use a strict comparison, because
    // 0 == 'any string'.
    $index = array_search('_none', $values, TRUE);
    if ($index !== FALSE) {
        unset($values[$index]);
    }
    // Transpose selections from field => delta to delta => field.
    $items = [];
    foreach ($values as $value) {
        $items[] = [
            $element['#key_column'] => $value,
        ];
    }
    $form_state->setValueForElement($element, $items);
}