SearchApiMoreLikeThis.php in Search API 8
File
src/Plugin/views/argument/SearchApiMoreLikeThis.php
View source
<?php
namespace Drupal\search_api\Plugin\views\argument;
use Drupal\Core\Form\FormStateInterface;
use Drupal\search_api\Entity\Index;
use Drupal\search_api\LoggerTrait;
use Drupal\search_api\SearchApiException;
class SearchApiMoreLikeThis extends SearchApiStandard {
use LoggerTrait;
public function defineOptions() {
$options = parent::defineOptions();
unset($options['break_phrase']);
unset($options['not']);
$options['fields'] = [
'default' => [],
];
return $options;
}
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
parent::buildOptionsForm($form, $form_state);
unset($form['break_phrase']);
unset($form['not']);
$index = Index::load(substr($this->table, 17));
$fields = [];
foreach ($index
->getFields() as $key => $field) {
$fields[$key] = $field
->getLabel();
}
if ($fields) {
$form['fields'] = [
'#type' => 'select',
'#title' => $this
->t('Fields for similarity'),
'#description' => $this
->t('Select the fields that will be used for finding similar content. If no fields are selected, all available fields will be used.'),
'#options' => $fields,
'#size' => min(8, count($fields)),
'#multiple' => TRUE,
'#default_value' => $this->options['fields'],
];
}
else {
$form['fields'] = [
'#type' => 'value',
'#value' => [],
];
}
}
public function query($group_by = FALSE) {
try {
$server = $this->query
->getIndex()
->getServerInstance();
if (!$server
->supportsFeature('search_api_mlt')) {
$backend_id = $server
->getBackendId();
$this
->getLogger()
->error('The search backend "@backend_id" does not offer "More like this" functionality.', [
'@backend_id' => $backend_id,
]);
$this->query
->abort();
return;
}
$fields = $this->options['fields'] ?? [];
if (!$fields) {
$fields = array_keys($this->query
->getIndex()
->getFields());
}
$mlt = [
'id' => $this->argument,
'fields' => $fields,
];
$this->query
->getSearchApiQuery()
->setOption('search_api_mlt', $mlt);
} catch (SearchApiException $e) {
$this->query
->abort($e
->getMessage());
}
}
}