/**
* Delete a record from the database.
*
* @param mixed $id
* @return int
*/
public function delete($id = null)
{
// If an ID is passed to the method, we will set the where clause to check
// the ID to allow developers to simply and quickly remove a single row
// from their database without manually specifying the where clauses.
if (!is_null($id)) {
$this->where('id', '=', $id);
}
$sql = $this->grammar->compileDelete($this);
return $this->connection->delete($sql, $this->getBindings());
}