class dbMy_color {
 
   const VOTE_SQL= "select name, count(id) as num_votes from {my_color}
                               group by name order by num_votes desc";
 
 
    function __construct() {
    }
 
    public function add($myColor) {
        $fields = array('name' => trim($myColor->name));
        $dbResult= db_insert('my_color')->fields($fields)->execute();
        // Note! $dbResult contains the serial field (autogen) int value created by the
        // database engine
        return $dbResult;
   }
 
    public function get($id = NULL) {
        $dbResult = db_query('select name from {my_color} where id = :id',
            array(':id'=>$id))->fetchObject();
        if ($dbResult == NULL) {
            throw new Exception('No value found');
        } else {
            $name = $dbResult->name;
            return $name;
        }
    }
 
    public function getCountByColor() {
        $stmnt = db_query(dbMy_color::VOTE_SQL);
        if ($stmnt == null)
            throw new Exception('Unexpected Database Exception Occurred');
 
        $rows= array();
        while($vote = $stmnt->fetch(PDO::FETCH_OBJ)) {
            $col = COLOR_SPAN_BEGIN.$vote->name.COLOR_SPAN_END.$vote->name;
            $rows[] = array($col, $vote->num_votes);
        }
 
        if (count($rows) == 0)
            throw new Exception('No Records Found');
 
        return $rows;
    }
}