Wrapper to Zend_Db is failing - php

Question

All,
I wrote the following wrapper that extends Zend_Db class to provide db connectivity to my entire application. The db connectivity works fine, but it fails to execute queries when invoked from a different class.
class Testapp_DB extends Zend_Db {
//Declare member variables.
public $db = null;
public $db_host = "";
public $db_database = "";
public $db_username = "";
public $db_password = "";
public function __construct()
{
//Read Database Info from Config File
$this->db_host = Testapp_Registry::get('config')->db->mysql->host;
$this->db_database = Testapp_Registry::get('config')->db->mysql->dbname;
$this->db_username = Testapp_Registry::get('config')->db->mysql->username;
$this->db_password = Testapp_Registry::get('config')->db->mysql->password;
$db = Zend_Db::factory('Mysqli', array(
'host' => $this->db_host,
'username' => $this->db_username,
'password' => $this->db_password,
'dbname' => $this->db_database
));
$db->getConnection(); //Works fine
$this->db = $db;
}
}
Trying to execute query in a PHP file that includes Testapp_DB - fails..
<?php
$db = new Testapp_DB();
print_r($db); //I can see the DB object here
$sql = 'SELECT * FROM tb_Log';
$result = $db->fetchAll($sql, 2); //This method fails.. Don't know why. Any ideas?
print_r($result);
?>
Can someone please explain, why the fetchAll method fails?
Thanks

Answer 1

*Zend_Db* doesnt have any method other than factory().
I dont really get, what you are trying to solve this way, but as far as I can see you need to call query() this way
$db->db->query();

Answer 2

Perhaps instead of using your wrapper, try this:
// Note: change your config to have a 'params' entry
$db = Zend_Db::factory(Testapp_Registry::get('config')->db->mysql);
Zend_Db_Table_Abstract::setDefaultAdapter($db);
Zend_Registry::set('database', $db);
// in your config
...mysql.params.host = ...
...mysql.params.dbname = ...
...mysql.params.username = ...
...mysql.params.password = ...
Then, your Zend_Db_Table objects will have connectivity, and in addition you can grab the connection using Zend_Registry::get('database'). And, you'll make only one database connection once per request.

Answer 3

Try to create a SQL file like schema.mysql.sql,
then test it on phpMyAdmin and when it's free of bugs run this code:
$bootstrap = $application->getBootstrap();
$bootstrap->bootstrap(‘db’);
$config = $bootstrap->getResource(‘db’)->getConfig();
$runCommand = “mysql -h “.$config["host"].” -P “.$config["port"].” -u’”.$config["username"].”‘ -p’”.$config["password"].”‘ “.$config["dbname"].” < “.dirname(__FILE__) . ‘/schema.mysql.sql’;
echo $runCommand;
system($runCommand);
Hope this helps! http://www.unexpectedit.com/zend-php/zend-db-exec-a-sql-file