/**
* Delete a record from the database.
*
* @param mixed $id
* @return int
*/
public function delete($id = null)
{
$wheres = $this->compileWheres();
$result = $this->collection->DeleteMany($wheres);
if (1 == (int) $result->isAcknowledged()) {
return $result->getDeletedCount();
}
return 0;
}