如何使用CakePHP上的数据库postgres参考设置database.config信息？

I want to set the database config from CakePhP 2.x with data from database

Example - database.config:

public $bd_test = array (
        'datasource' => 'Database/Postgres',
        'persistent' => false,
        'host' => 'localhost',
        'login' => 'root',
        'password' => 'root',
        'database' => 'bd_test',
        'port' => '5432',
        //'encoding' => 'UTF-8'
);

Should looks like:

$dataFromDb = $this->Model->find('all', array('fields' => array('host', 'login', 'password', 'database', 'port'), 'conditions' => array('database' => 'bd_test')));

public $bd_test = array (
        'datasource' => 'Database/Postgres',
        'persistent' => false,
        'host' => $dataFromDb['host'],
        'login' => $dataFromDb['login'],
        'password' => $dataFromDb['password'],
        'database' => $dataFromDb['database'],
        'port' => '5432',
        //'encoding' => 'UTF-8'
);

Something like that.. I guess that the Idea is clear, right? If need some more information, please tell me. Thanks.

You should be able to set config-datasets at runtime with Configure::write('nameofconfigfield,'value'); If this does'nt work, I'm sorry. I'm not familiar with CakePHP 2.x, I only used 3.x.

I answered like I understood your question. But I don't know what you want to achieve with changing the DB connection at runtime.

I found the solution:

 public function beforeFilter(){        
    App::uses('ConnectionManager', 'Model');
    $databases = $this->YourModel->find('all');
    foreach($databases as $valor){
        foreach($valor as $value){
            $settings = array(
                    'datasource' => 'Database/Postgres',
                    'persistent' => false,
                    'host' => $value['host'],
                    'login' => $value['user'],
                    'password' => $value['password'],
                    'database' => $value['database'],
                    'port' => $value['port']
            );
            ConnectionManager::create($value['nome_banco'], $settings);
        }
    }
}

And Later I had to do setDataSource or you can replace the default connection with : ConnectionManager::create('default', $settings); Right this:

ConnectionManager::getDataSource('default')->disconnect();
ConnectionManager::drop('default');
ConnectionManager::create('default', $settings);

But how I want to use both connections I didn't that. Thanks to M4R1KU that helped me.