How Can I Read the DB Configuration Settings From a Cake Shell? - cakephp

Question

I would like to write a cake shell to do a nightly backup of my database using mysqldump. I could do this as a shell script, but if I can cram it into a CakePHP shell, then I will get the added benefit of it working across both the development and live server, if I can get it to automagically read my database config settings. I will cron the cake shell and have some peace-of-mind knowing that I have frequent backups of my DB.
In my shell I'm trying to build up a string which starts with "mysqldump --user=" and I'd like to get the username from app/config/database.php. How can I get at the data in database.php?

Answer 1

In cake 2.1 the format has changed to:
App::uses('ConnectionManager', 'Model');
$dataSource = ConnectionManager::getDataSource('default');
$username = $dataSource->config['login'];

Answer 2

The following snippet should do the trick:
App::import('Core', 'ConnectionManager');
$dataSource = ConnectionManager::getDataSource('default');
$username = $dataSource->config['login'];

Answer 3

In CakePHP 3.x the format has changed to -
use Cake\Datasource\ConnectionManager;
$source = ConnectionManager::get('default');
debug($source); #Debugging the result
Result :
object(Cake\Database\Connection) {
'config' => [
'password' => '*****',
'username' => '*****',
'host' => '*****',
'database' => '*****',
'driver' => 'Cake\Database\Driver\Mysql',
'persistent' => false,
'encoding' => 'utf8',
'timezone' => 'UTC',
'cacheMetadata' => true,
'quoteIdentifiers' => false,
'log' => false,
'url' => null,
'name' => 'remote'
],
'driver' => object(Cake\Database\Driver\Mysql) {
'connected' => false
},
'transactionLevel' => (int) 0,
'transactionStarted' => false,
'useSavePoints' => false,
'logQueries' => false,
'logger' => null
}
Get the Result :
debug($source->config()); #Accessing the result
Result :
[
'driver' => 'Cake\Database\Driver\Mysql',
'persistent' => false,
'host' => 'localhost',
'username' => 'username',
'password' => 'password',
'database' => 'database',
'encoding' => 'utf8',
'timezone' => 'UTC',
'cacheMetadata' => true,
'quoteIdentifiers' => false,
'log' => false,
'url' => null,
'name' => 'remote'
]

Answer 4

Just for sharing.
For any cakephp project, if using php as cronjob or command line to do large data processing I would build a standalone php script without cakephp, the reason for doing this because cakephp is slow (e.g. read & process 100K records).
To make my life simple I put all my standalone scripts under app/Vendor/myscripts/ (e.g: app/Vendor/myscripts/process.php)
below also the basic code to make sure you use the same database settings in standalone script with cakephp (tested with MySQL)
require_once '/XYZ/app/Config/database.php';
$database = new DATABASE_CONFIG;
try{
$dblink = new PDO('mysql:host='.$database->default['host'].';dbname='.$database->default['database'], $database->default['login'], $database->default['password'], array(PDO::ATTR_PERSISTENT => false));
$dblink->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$dblink->exec('SET CHARACTER SET '.$database->default['encoding']);
} catch (Exception $e) {
die('DB Error'. $e->getMessage());
}

Answer 5

Example in controller, Change multi DB for DataSources in CakePHP 2.5.x
App::uses('AppController', 'Controller');
class DemoController extends AppController {
public $uses = array('AppModel', 'GVA21', 'GVA01', 'GVA14', 'GVA24' );
public function test_dbs(){
$this->autoRender=false;
// Load ConnectManager
App::uses('ConnectionManager', 'Model');
// DataSource ['default']
$MDM = $this->GVA14->find('count');
echo "MDM.GVA14\n<br>";
debug($MDM);
// Get DataSource Config DB ['default'] and ['SRL']
$confDeafult = ConnectionManager::$config->default;
$confSrl = ConnectionManager::$config->SRL;
// Change DataSource ['SRL']
ConnectionManager::drop('default');
ConnectionManager::create('default',$confSrl); //<== Is permanet change Find All models Down
// $this->GVA01->setDataSource('SRL'); //<== Is temp change Find model
echo "SRL.GVA14\n<br>";
$SRL = $this->GVA14->find('count');
debug($SRL);
$SRL = $this->GVA01->find('count');
echo "SRL.GVA01\n<br>";
debug($SRL);
$SRL = $this->GVA21->find('count');
echo "SRL.GVA21\n<br>";
debug($SRL);
// Change to DataSource ['default']
debug(ConnectionManager::drop('default'));
ConnectionManager::create('default',$confDeafult); //<== Is permanet change Find All models Down
//$this->GVA01->setDataSource('default'); //<== Is temp change Find model
$MDM = $this->GVA01->find('count');
echo "MDM.GVA01\n<br>";
debug($MDM);
$MDM = $this->GVA21->find('count');
echo "MDM.GVA21\n<br>";
debug($MDM);
////FIN
exit('FIN');
}