Playing with PHP, CouchDB and ORM

I’m playing with PHP and CouchDB. After writing a class to connect PHP and CouchDB I’ve done a variation of the interface to use CouchDB with PHP in a similar way to ORM. Yes. I know ORM means Object Relational Mapping and CouchDB isn’t a Relational Database but have a look to the following interface:

Imagine you have a CouchDb at localhost:5987 and you have a database called users.

Now let’s build a class called CDB_Users.

class CDB_Users extends Nov_CouchDb_Orm {
    static $_db = 'users';

It’s easy to automate the creation of CDB_Users with a script

CDB_Users extends Nov_CouchDb_Orm

class Nov_CouchDb_Orm
    static protected $_db;

     * @param string $key
     * @return Nov_CouchDb
    static public function connect($key)
        $class = get_called_class();

        $couchDb = new Nov_CouchDb($host, $port, $protocol, $user, $password);
        return $couchDb->db($class::$_db);

A configuration class:

class Nov_CouchDb_Conf
    const CDB1 = 'CDB1';

    private static $_conf = array(
        self::CDB1 => array(
            'protocol' => 'http',
            'host'     => 'localhost',
            'port'     => 5984,
            'user'     => null,
            'password' => null

    static function get($key)
        return self::$_conf[$key];

Putting all together with the class Nov_CouchDb
we can use:

CDB_Users::connect(Nov_CouchDb_Conf::CDB1)->insert('gonzalo', array('password' => 'g1'));
$data = CDB_Users::connect(Nov_CouchDb_Conf::CDB1)->select('gonzalo')->asArray();

CDB_Users::connect(Nov_CouchDb_Conf::CDB1)->update('gonzalo', array('password' => 'g2'));
$data = CDB_Users::connect(Nov_CouchDb_Conf::CDB1)->select('gonzalo')->asArray();


What do you think? That’s not exactly a ORM. I’m not sure if I will use that interface instead the classic one.

$data = CDB_Users::connect(Nov_CouchDb_Conf::CDB1)->select('gonzalo')->asArray();
// versus
$couchDb = new Nov_CouchDb('localhost', 5984);
$data = $couchDb->db('users')->select('gonzalo')->asArray()

Here is the full source code with the examples.


About Gonzalo Ayuso

Web Architect. PHP, Python, Node, Angular, ionic, PostgreSQL, Linux, ... Always learning.

Posted on March 16, 2010, in CouchDB, php, Technology. Bookmark the permalink. Leave a comment.

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