DBALException: The options 'driver' or 'driverClass' are mandatory if no PDO instance is given to DriverManager::getConnection().

I followed your setup guide and got this error:

DBALException: The options 'driver' or 'driverClass' are mandatory if no PDO instance is given to DriverManager::getConnection().

My config.yml doctrine section:

doctrine:
    dbal:
        driver:   pdo_mysql
        host:     %database_host%
        port:     %database_port%
        dbname:   %database_name%
        user:     %database_user%
        password: %database_password%
        charset:  UTF8

[hubertperron]

Which Symfony version are you using ?

2.3.9

[hubertperron]

I'm having a hard time reproducing the issue.

Are you using multiple database connections and/or multiple entity managers?
Do the database connection work when you disable the DatabaseConfigBundle and the custom getContainerBuilder() method on the kernel ?

I´m working on a pretty new project with no mentionable changes and one connection. The connection works when I disable the bundle.

I hotfixed the problem by adding

$mergedConfig['dbal']['driver'] = 'pdo_mysql';

before the line

$params = $mergedConfig['dbal'];

in the initConnection function(ContainerBuilder.php).

[ibasaw]

same problem here: Symfony 2.8