public static function selectDistinct(...$expressions)
{
$select = new SelectClause();
$select->setDistinct(true);
$select->addFields($expressions);
$statement = static::_getQueryStatement();
$statement->addClause($select);
return $statement;
}
/**
* Find all distinct values of a property in the collection
*
* @param $property
*
* @return array
*/
public function distinct($property)
{
if ($this->isEmpty()) {
$select = new SelectClause();
$select->setDistinct(true);
$select->addField($property);
$originalClause = $this->_query->getClause('SELECT');
$this->_query->addClause($select);
$results = $this->_getDataStore()->getData($this->_query);
$this->_query->addClause($originalClause);
if (empty($results)) {
return [];
}
return Arrays::ipull($results, $property);
}
return parent::distinct($property);
}
