Using Multiple Databases Within CodeIgniter

Question

DISCLAIMER: I\'m new to web development

SCENARIO: I\'m building a web application that uses ion_auth to manage all of the user/administrator information (uses MySQL

Answer 1

in your database config file add as many configuration groups as the numbers of your databases:

$db['a']['hostname'] = 'localhost';
$db['a']['username'] = 'user';
$db['a']['password'] = 'pw';
$db['a']['database'] = 'db1';
...

$db['b']['hostname'] = 'localhost';
$db['b']['username'] = 'user';
$db['b']['password'] = 'pw';
$db['b']['database'] = 'db2';
...

//set the default db
$active_group = 'a';

then on your model initialize a class variable:

private $db_b;

and, into the contructor, set it as follow

__construct()
{
   ...
   $this->db_b = $this->load->database('b', TRUE); 
}

now you are able to use the database b as usual:

$this->db_b->query('YOUR QUERY');

and obviously the default one as follow:

$this->db->query('YOUR QUERY');