function EntityReferenceItem::fieldSettingsForm

Overrides FieldItemBase::fieldSettingsForm

File

core/lib/Drupal/Core/Field/Plugin/Field/FieldType/EntityReferenceItem.php, line 372

Class

EntityReferenceItem

Defines the 'entity_reference' entity field type.

Namespace

Code

public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
    $field = $form_state->getFormObject()
        ->getEntity();
    // Get all selection plugins for this entity type.
    $selection_plugins = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionGroups($this->getSetting('target_type'));
    $handlers_options = [];
    foreach (array_keys($selection_plugins) as $selection_group_id) {
        // We only display base plugins (e.g. 'default', 'views', ...) and not
        // entity type specific plugins (e.g. 'default:node', 'default:user',
        // ...).
        if (array_key_exists($selection_group_id, $selection_plugins[$selection_group_id])) {
            $handlers_options[$selection_group_id] = Html::escape($selection_plugins[$selection_group_id][$selection_group_id]['label']);
        }
        elseif (array_key_exists($selection_group_id . ':' . $this->getSetting('target_type'), $selection_plugins[$selection_group_id])) {
            $selection_group_plugin = $selection_group_id . ':' . $this->getSetting('target_type');
            $handlers_options[$selection_group_plugin] = Html::escape($selection_plugins[$selection_group_id][$selection_group_plugin]['base_plugin_label']);
        }
    }
    $form = [
        '#type' => 'container',
        '#process' => [
            [
                get_class($this),
                'fieldSettingsAjaxProcess',
            ],
        ],
        '#element_validate' => [
            [
                get_class($this),
                'fieldSettingsFormValidate',
            ],
        ],
    ];
    $form['handler'] = [
        '#type' => 'details',
        '#title' => t('Reference type'),
        '#open' => TRUE,
        '#tree' => TRUE,
        '#process' => [
            [
                get_class($this),
                'formProcessMergeParent',
            ],
        ],
    ];
    $form['handler']['handler'] = [
        '#type' => 'select',
        '#title' => t('Reference method'),
        '#options' => $handlers_options,
        '#default_value' => $field->getSetting('handler'),
        '#required' => TRUE,
        '#ajax' => TRUE,
        '#limit_validation_errors' => [],
    ];
    $form['handler']['handler_submit'] = [
        '#type' => 'submit',
        '#value' => t('Change handler'),
        '#limit_validation_errors' => [],
        '#attributes' => [
            'class' => [
                'js-hide',
            ],
        ],
        '#submit' => [
            [
                get_class($this),
                'settingsAjaxSubmit',
            ],
        ],
    ];
    $form['handler']['handler_settings'] = [
        '#type' => 'container',
        '#attributes' => [
            'class' => [
                'entity_reference-settings',
            ],
        ],
    ];
    $handler = \Drupal::service('plugin.manager.entity_reference_selection')->getSelectionHandler($field);
    $form['handler']['handler_settings'] += $handler->buildConfigurationForm([], $form_state);
    return $form;
}