Question

我想从两个不同的数据库表中检索数据，例如作业数据库和分类数据库，在那两个数据库中我有job_history表和ad_mobile_phones表现在我想在单个控制器上从这两个表中检索数据请建议我提前谢谢

$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;

控制器

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

在config / database.php中建立新连接

第一个db（主数据库）： -

$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;

第二个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;

然后在控制器中加载第二个数据库，如

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

并获取类似

的查询

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

更多信息： - 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...

从codeigniter中的单个控制器上的两个数据库中检索数据

2 个答案: