Retrieve data from two Databases on single controller in codeigniter

Question

i want to retrieve data from two different databases tables such as job database and classified database in that two databases i have job_history table and ad_mobile_phones table now i want to retrieve the data from these two tables on single controller please suggest me thanks in advance

$active_group = 'default';
$active_record = TRUE;



//for job portal
$db['default']['hostname'] = 'TZ07';
$db['default']['username'] = 'root';
$db['default']['password'] = 'TZ';
$db['default']['database'] = 'doolaly_jobz';

$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;


//for classified portal
$db['classified_db']['hostname'] = 'TZ07';
$db['classified_db']['username'] = 'root';
$db['classified_db']['password'] = 'TZ';
$db['classified_db']['database'] = 'doolaly';



$db['classified_db']['dbdriver'] = 'mysql';
$db['classified_db']['dbprefix'] = '';
$db['classified_db']['pconnect'] = TRUE;
$db['classified_db']['db_debug'] = TRUE;
$db['classified_db']['cache_on'] = FALSE;
$db['classified_db']['cachedir'] = '';
$db['classified_db']['char_set'] = 'utf8';
$db['classified_db']['dbcollat'] = 'utf8_general_ci';
$db['classified_db']['swap_pre'] = '';
$db['classified_db']['autoinit'] = TRUE;
$db['classified_db']['stricton'] = FALSE;

Controller

class Account_detail extends CI_Controller 
{
    public function __construct()
    {
        parent::__construct();
        $this->load->model('Jobseekermodel','',TRUE);
        $CI =   &get_instance();
        $this->db = $CI->load->database('classified_db', TRUE);
        //$secound_db= $this->load->database('classified_db',TRUE);
        $this->load->model('Emailmodel','',TRUE);
        $this->load->model('Bookmodel','',TRUE);
        $this->load->model('Consultantmodel','',TRUE);
        $this->load->model('Openingmodel','',TRUE);
        $this->load->model('Commfuncmodel','',TRUE);
        $this->lang->load('message', 'english');
        $this->lang->load('mail', 'english');
        $this->load->library('form_validation');
        if (session_id() == "") session_start();
    }
}

Answer 1

make a new connection in your config/database.php

first db (main db):-

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'doolaly_jobz';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

second db :-

$db['db2']['hostname'] = 'localhost';
$db['db2']['username'] = 'root';
$db['db2']['password'] = '';
$db['db2']['database'] = 'doolaly';
$db['db2']['dbdriver'] = 'mysql';
$db['db2']['dbprefix'] = '';
$db['db2']['pconnect'] = FALSE;
$db['db2']['db_debug'] = TRUE;
$db['db2']['cache_on'] = FALSE;
$db['db2']['cachedir'] = '';
$db['db2']['char_set'] = 'utf8';
$db['db2']['dbcollat'] = 'utf8_general_ci';
$db['db2']['swap_pre'] = '';
$db['db2']['autoinit'] = TRUE;
$db['db2']['stricton'] = FALSE;

Then load your second db in controller like

$CI =   &get_instance();
$this->db2 = $CI->load->database('db2', TRUE); //doolaly

and get query like

$this->db2->query('your_query') //doolaly
 $this->db->query('your_query') // doolaly_jobz

For more :- Codeigniter - multiple database connections

Answer 2

you can manually connect to db each time you need or you can autoload it...
set like this in your config.php

$config['hostname'] = 'localhost';
$config['username'] = 'root';
$config['password'] = '';
$config['database'] = 'doolaly';
$config['dbdriver'] = 'mysql';
$config['dbprefix'] = '';
$config['pconnect'] = FALSE;
$config['db_debug'] = TRUE;
$config['cache_on'] = FALSE;
$config['cachedir'] = '';
$config['char_set'] = 'utf8';
$config['dbcollat'] = 'utf8_general_ci';
$config['swap_pre'] = '';
$config['autoinit'] = TRUE;
$config['stricton'] = FALSE;

add the desired fields and connect the db using
$this->load->database($config);

or try this

$dsn = 'dbdriver://username:password@hostname/database';

$this->load->database($dsn);

it will works...