/**
* {@inheritdoc}
*/
public function query($group_by = FALSE) {
$this->fillValue();
$condition_operator = empty($this->options['not']) ? '=' : '<>';
if (count($this->value) > 1) {
$filter = $this->query->createFilter(Unicode::strtoupper($this->operator));
// $filter will be NULL if there were errors in the query.
if ($filter) {
foreach ($this->value as $value) {
$filter->condition($this->realField, $value, $condition_operator);
}
$this->query->filter($filter);
}
}
else {
$this->query->condition($this->realField, reset($this->value), $condition_operator);
}
}
