1. 8.3.x core/modules/views/src/Plugin/views/row/RssFields.php RssFields
  2. 8.0.x core/modules/views/src/Plugin/views/row/RssFields.php RssFields
  3. 8.1.x core/modules/views/src/Plugin/views/row/RssFields.php RssFields
  4. 8.2.x core/modules/views/src/Plugin/views/row/RssFields.php RssFields
  5. 8.4.x core/modules/views/src/Plugin/views/row/RssFields.php RssFields

Renders an RSS item based on fields.

Plugin annotation

  id = "rss_fields",
  title = @Translation("Fields"),
  help = @Translation("Display fields as RSS items."),
  theme = "views_view_row_rss",
  display_types = {"feed"}


Expanded class hierarchy of RssFields


core/modules/views/src/Plugin/views/row/RssFields.php, line 19


View source
class RssFields extends RowPluginBase {

   * Does the row plugin support to add fields to it's output.
   * @var bool
  protected $usesFields = TRUE;

  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['title_field'] = array('default' => '');
    $options['link_field'] = array('default' => '');
    $options['description_field'] = array('default' => '');
    $options['creator_field'] = array('default' => '');
    $options['date_field'] = array('default' => '');
    $options['guid_field_options']['contains']['guid_field'] = array('default' => '');
    $options['guid_field_options']['contains']['guid_field_is_permalink'] = array('default' => TRUE);
    return $options;

  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);

    $initial_labels = array('' => $this->t('- None -'));
    $view_fields_labels = $this->displayHandler->getFieldLabels();
    $view_fields_labels = array_merge($initial_labels, $view_fields_labels);

    $form['title_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('Title field'),
      '#description' => $this->t('The field that is going to be used as the RSS item title for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['title_field'],
      '#required' => TRUE,
    $form['link_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('Link field'),
      '#description' => $this->t('The field that is going to be used as the RSS item link for each row. This must be a drupal relative path.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['link_field'],
      '#required' => TRUE,
    $form['description_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('Description field'),
      '#description' => $this->t('The field that is going to be used as the RSS item description for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['description_field'],
      '#required' => TRUE,
    $form['creator_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('Creator field'),
      '#description' => $this->t('The field that is going to be used as the RSS item creator for each row.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['creator_field'],
      '#required' => TRUE,
    $form['date_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('Publication date field'),
      '#description' => $this->t('The field that is going to be used as the RSS item pubDate for each row. It needs to be in RFC 2822 format.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['date_field'],
      '#required' => TRUE,
    $form['guid_field_options'] = array(
      '#type' => 'details',
      '#title' => $this->t('GUID settings'),
      '#open' => TRUE,
    $form['guid_field_options']['guid_field'] = array(
      '#type' => 'select',
      '#title' => $this->t('GUID field'),
      '#description' => $this->t('The globally unique identifier of the RSS item.'),
      '#options' => $view_fields_labels,
      '#default_value' => $this->options['guid_field_options']['guid_field'],
      '#required' => TRUE,
    $form['guid_field_options']['guid_field_is_permalink'] = array(
      '#type' => 'checkbox',
      '#title' => $this->t('GUID is permalink'),
      '#description' => $this->t('The RSS item GUID is a permalink.'),
      '#default_value' => $this->options['guid_field_options']['guid_field_is_permalink'],

  public function validate() {
    $errors = parent::validate();
    $required_options = array('title_field', 'link_field', 'description_field', 'creator_field', 'date_field');
    foreach ($required_options as $required_option) {
      if (empty($this->options[$required_option])) {
        $errors[] = $this->t('Row style plugin requires specifying which views fields to use for RSS item.');
    // Once more for guid.
    if (empty($this->options['guid_field_options']['guid_field'])) {
      $errors[] = $this->t('Row style plugin requires specifying which views fields to use for RSS item.');
    return $errors;

  public function render($row) {
    static $row_index;
    if (!isset($row_index)) {
      $row_index = 0;
    if (function_exists('rdf_get_namespaces')) {
      // Merge RDF namespaces in the XML namespaces in case they are used
      // further in the RSS content.
      $xml_rdf_namespaces = array();
      foreach (rdf_get_namespaces() as $prefix => $uri) {
        $xml_rdf_namespaces['xmlns:' . $prefix] = $uri;
      $this->view->style_plugin->namespaces += $xml_rdf_namespaces;

    // Create the RSS item object.
    $item = new \stdClass();
    $item->title = $this->getField($row_index, $this->options['title_field']);
    // @todo Views should expect and store a leading /. See:
    //   https://www.drupal.org/node/2423913
    $item->link = Url::fromUserInput('/' . $this->getField($row_index, $this->options['link_field']))->setAbsolute()->toString();

    $field = $this->getField($row_index, $this->options['description_field']);
    $item->description = is_array($field) ? $field : ['#markup' => $field];

    $item->elements = array(
      array('key' => 'pubDate', 'value' => $this->getField($row_index, $this->options['date_field'])),
        'key' => 'dc:creator',
        'value' => $this->getField($row_index, $this->options['creator_field']),
        'namespace' => array('xmlns:dc' => 'http://purl.org/dc/elements/1.1/'),
    $guid_is_permalink_string = 'false';
    $item_guid = $this->getField($row_index, $this->options['guid_field_options']['guid_field']);
    if ($this->options['guid_field_options']['guid_field_is_permalink']) {
      $guid_is_permalink_string = 'true';
      // @todo Enforce GUIDs as system-generated rather than user input? See
      //   https://www.drupal.org/node/2430589.
      $item_guid = Url::fromUserInput('/' . $item_guid)->setAbsolute()->toString();
    $item->elements[] = array(
      'key' => 'guid',
      'value' => $item_guid,
      'attributes' => array('isPermaLink' => $guid_is_permalink_string),


    foreach ($item->elements as $element) {
      if (isset($element['namespace'])) {
        $this->view->style_plugin->namespaces = array_merge($this->view->style_plugin->namespaces, $element['namespace']);

    $build = array(
      '#theme' => $this->themeFunctions(),
      '#view' => $this->view,
      '#options' => $this->options,
      '#row' => $item,
      '#field_alias' => isset($this->field_alias) ? $this->field_alias : '',

    return $build;

   * Retrieves a views field value from the style plugin.
   * @param $index
   *   The index count of the row as expected by views_plugin_style::getField().
   * @param $field_id
   *   The ID assigned to the required field in the display.
   * @return string|null|\Drupal\Component\Render\MarkupInterface
   *   An empty string if there is no style plugin, or the field ID is empty.
   *   NULL if the field value is empty. If neither of these conditions apply,
   *   a MarkupInterface object containing the rendered field value.
  public function getField($index, $field_id) {
    if (empty($this->view->style_plugin) || !is_object($this->view->style_plugin) || empty($field_id)) {
      return '';
    return $this->view->style_plugin->getField($index, $field_id);



Contains filters are case sensitive
Namesort descending Modifiers Type Description Overrides
DependencySerializationTrait::$_serviceIds protected property An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep public function Prevents serializing any properties. 1
DependencySerializationTrait::__wakeup public function 2
PluginBase::$configuration protected property Configuration information passed into the plugin. 1
PluginBase::$definition public property Plugins's definition
PluginBase::$displayHandler public property The display object this plugin is for.
PluginBase::$options public property Options for this plugin will be held here.
PluginBase::$pluginDefinition protected property The plugin implementation definition.
PluginBase::$pluginId protected property The plugin_id.
PluginBase::$renderer protected property Stores the render API renderer. 2
PluginBase::$view public property The top object of a view. 1
PluginBase::calculateDependencies public function Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies 23
PluginBase::create public static function Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create 55
PluginBase::DERIVATIVE_SEPARATOR constant A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::destroy public function Clears a plugin. Overrides ViewsPluginInterface::destroy 2
PluginBase::doFilterByDefinedOptions protected function Do the work to filter out stored options depending on the defined options.
PluginBase::filterByDefinedOptions public function Filter out stored options depending on the defined options. Overrides ViewsPluginInterface::filterByDefinedOptions
PluginBase::getAvailableGlobalTokens public function Returns an array of available token replacements. Overrides ViewsPluginInterface::getAvailableGlobalTokens
PluginBase::getBaseId public function Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId public function Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition public function Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition 1
PluginBase::getPluginId public function Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::getProvider public function Returns the plugin provider. Overrides ViewsPluginInterface::getProvider
PluginBase::getRenderer protected function Returns the render API renderer. 1
PluginBase::globalTokenForm public function Adds elements for available core tokens to a form. Overrides ViewsPluginInterface::globalTokenForm
PluginBase::globalTokenReplace public function Returns a string with any core tokens replaced. Overrides ViewsPluginInterface::globalTokenReplace
PluginBase::INCLUDE_ENTITY constant Include entity row languages when listing languages.
PluginBase::INCLUDE_NEGOTIATED constant Include negotiated languages when listing languages.
PluginBase::init public function Initialize the plugin. Overrides ViewsPluginInterface::init 8
PluginBase::listLanguages protected function Makes an array of languages, optionally including special languages.
PluginBase::pluginTitle public function Return the human readable name of the display. Overrides ViewsPluginInterface::pluginTitle
PluginBase::preRenderAddFieldsetMarkup public static function Moves form elements into fieldsets for presentation purposes. Overrides ViewsPluginInterface::preRenderAddFieldsetMarkup
PluginBase::preRenderFlattenData public static function Flattens the structure of form elements. Overrides ViewsPluginInterface::preRenderFlattenData
PluginBase::queryLanguageSubstitutions public static function Returns substitutions for Views queries for languages.
PluginBase::setOptionDefaults protected function Fills up the options of the plugin with defaults.
PluginBase::summaryTitle public function Returns the summary of the settings in the display. Overrides ViewsPluginInterface::summaryTitle 6
PluginBase::themeFunctions public function Provide a full list of possible theme templates used by this style. Overrides ViewsPluginInterface::themeFunctions 1
PluginBase::unpackOptions public function Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away. Overrides ViewsPluginInterface::unpackOptions
PluginBase::usesOptions public function Returns the usesOptions property. Overrides ViewsPluginInterface::usesOptions 8
PluginBase::viewsTokenReplace protected function Replaces Views' tokens in a given string. The resulting string will be sanitized with Xss::filterAdmin. 1
PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT constant Query string to indicate the site default language.
PluginBase::__construct public function Constructs a PluginBase object. Overrides PluginBase::__construct
RowPluginBase::$usesOptions protected property Denotes whether the plugin has an additional options form. Overrides PluginBase::$usesOptions 1
RowPluginBase::preRender public function Allow the style to do stuff before each row is rendered. 4
RowPluginBase::query public function Add anything to the query that we might need to. Overrides PluginBase::query 2
RowPluginBase::submitOptionsForm public function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data. Overrides PluginBase::submitOptionsForm 1
RowPluginBase::usesFields function Returns the usesFields property. 4
RowPluginBase::validateOptionsForm public function Validate the options form. Overrides PluginBase::validateOptionsForm 1
RssFields::$usesFields protected property Does the row plugin support to add fields to it's output. Overrides RowPluginBase::$usesFields
RssFields::buildOptionsForm public function Provide a form for setting options. Overrides RowPluginBase::buildOptionsForm
RssFields::defineOptions protected function Information about options for all kinds of purposes will be held here. Overrides RowPluginBase::defineOptions
RssFields::getField public function Retrieves a views field value from the style plugin.
RssFields::render public function Render a row object. This usually passes through to a theme template of some form, but not always. Overrides RowPluginBase::render
RssFields::validate public function Validate that the plugin is correct and can be saved. Overrides PluginBase::validate
StringTranslationTrait::$stringTranslation protected property The string translation service.
StringTranslationTrait::formatPlural protected function Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals protected function Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation protected function Gets the string translation service.
StringTranslationTrait::setStringTranslation public function Sets the string translation service to use. 2
StringTranslationTrait::t protected function Translates a string to the current language or to a given language. 2