Symfony2, Dynamic DB Connection/Early override of Doctrine Service

Question

I have a Core config Database, each row is an \'App\' with some basic config etc.
Once you have chosen your app, I want to connect to a database using a property of that

Answer 1

In symfony 4, you can pull it off with a wrapper class:

# doctrine.yaml
doctrine:
    dbal:
      connections:
        default:
          wrapper_class: App\Service\Database\DynamicConnection

The class simply extends the original Connection:

class DynamicConnection extends \Doctrine\DBAL\Connection
{

    public function changeDatabase(string $dbName)
    {
        $params = $this->getParams();

        if ($this->isConnected())
            $this->close();

        if (isset($params['url'])) {
            $params['url'] = preg_replace(
                sprintf("/(?<=\/)%s/", preg_quote($this->getDatabase())),
                $dbName,
                $params['url']
            );
        }

        if (isset($params['dbname']))
            $params['dbname'] = $dbName;

        parent::__construct(
            $params,
            $this->_driver,
            $this->_config,
            $this->_eventManager
        );

    }
}