/**
* Get the (reference) field information for a single item.
*
* @param ResourceFieldInterface $resource_field
* The resource field.
*
* @throws \Drupal\restful\Exception\BadRequestException
*
* @return array
* An array containing the following keys:
* - 'name': Drupal's internal field name. Ex: field_article_related
* - 'type': Either a field or a property.
* - 'entity_type': The entity type this field points to. Not populated if
* the field is not a reference (for instance the destination field used
* in the where clause).
* - 'bundles': The allowed bundles for this field. Not populated if the
* field is not a reference (for instance the destination field used in
* the where clause).
*/
protected function getFieldsFromPublicNameItem(ResourceFieldInterface $resource_field)
{
$property = $resource_field->getProperty();
$resource = $resource_field->getResource();
$item = array('name' => $property, 'type' => ResourceFieldEntity::propertyIsField($property) ? RelationalFilterInterface::TYPE_FIELD : RelationalFilterInterface::TYPE_PROPERTY, 'entity_type' => NULL, 'bundles' => array());
$item['column'] = $item['type'] == RelationalFilterInterface::TYPE_FIELD ? $resource_field->getColumn() : NULL;
$instance_id = sprintf('%s:%d.%d', $resource['name'], $resource['majorVersion'], $resource['minorVersion']);
/* @var ResourceEntity $resource */
$resource = restful()->getResourceManager()->getPluginCopy($instance_id, Request::create('', array(), RequestInterface::METHOD_GET));
// Variables for the next iteration.
$definitions = $resource->getFieldDefinitions();
$item['entity_type'] = $resource->getEntityType();
$item['bundles'] = $resource->getBundles();
return array($item, $definitions);
}
/**
* Get value from a field rendered by Drupal field API's formatter.
*
* @param \EntityMetadataWrapper $property_wrapper
* The property wrapper. Either \EntityDrupalWrapper or \EntityListWrapper.
* @param \EntityDrupalWrapper $wrapper
* The entity wrapper.
*
* @return mixed
* A single or multiple values.
*
* @throws \Drupal\restful\Exception\ServerConfigurationException
*/
protected function formatterValue(\EntityMetadataWrapper $property_wrapper, \EntityDrupalWrapper $wrapper)
{
$value = NULL;
if (!ResourceFieldEntity::propertyIsField($this->getProperty())) {
// Property is not a field.
throw new ServerConfigurationException(format_string('@property is not a configurable field, so it cannot be processed using field API formatter', array('@property' => $this->getProperty())));
}
// Get values from the formatter.
$output = field_view_field($this->getEntityType(), $wrapper->value(), $this->getProperty(), $this->getFormatter());
// Unset the theme, as we just want to get the value from the formatter,
// without the wrapping HTML.
unset($output['#theme']);
if ($property_wrapper instanceof \EntityListWrapper) {
// Multiple values.
foreach (element_children($output) as $delta) {
$value[] = drupal_render($output[$delta]);
}
} else {
// Single value.
$value = drupal_render($output);
}
return $value;
}