/**
* Removes any relationships that are not included
* in the list of IDs.
*
* @param array $ids
*
* @return self
*/
public function sync(array $ids)
{
$pivot = new Pivot();
$pivot->setTablename($this->tablename);
$query = new Query($pivot);
$localIds = $this->localModel->ids();
foreach ($localIds as $property => $id) {
$query->where($this->localKey, $id);
}
if (count($ids) > 0) {
$in = implode(',', $ids);
$query->where("{$this->foreignKey} NOT IN ({$in})");
}
$query->delete();
return $this;
}