Plugin implementation of the 'entity reference taxonomy term RSS' formatter.
@todo: Have a way to indicate this formatter applies only to taxonomy terms.
@FieldFormatter(
id = "entity_reference_rss_category",
module = "taxonomy",
label = @Translation("RSS category"),
description = @Translation("Display reference to taxonomy term in RSS."),
field_types = {
"entity_reference"
}
)
Expanded class hierarchy of EntityReferenceTaxonomyTermRssFormatter
class EntityReferenceTaxonomyTermRssFormatter extends EntityReferenceFormatterBase {
/**
* Overrides Drupal\entity_reference\Plugin\field\formatter\EntityReferenceFormatterBase::viewElements().
*/
public function viewElements(EntityInterface $entity, $langcode, array $items) {
$elements = array();
foreach ($items as $delta => $item) {
$entity->rss_elements[] = array(
'key' => 'category',
'value' => $item['entity']
->label(),
'attributes' => array(
'domain' => $item['target_id'] ? url('taxonomy/term/' . $item['target_id'], array(
'absolute' => TRUE,
)) : '',
),
);
}
return $elements;
}
}