after.yml

# Services for a bundle are always loaded

# hello configLoad() will be called automatically (if defined)

# Namespaces can be simplified
doctrine:
    dbal:
        dbname:   xxxxxxxx
        user:     xxxxxxxx
        password: ~
        logging:  %kernel.debug%
    orm:
        auto_generate_proxy_classes: %kernel.debug%
        mappings:
            HelloBundle: ~

    # The bundle has to provide hooks for disabling certain services
    # For example, DoctrineBundle could disable ORM if this key is set to NULL
    # orm: ~

before.yml

# Services for a bundle are only loaded if their config key is available
# So config keys have to be set to NULL if no custom configuration is desired

hello_config: ~

doctrine.dbal:
    dbname:   xxxxxxxx
    user:     xxxxxxxx
    password: ~
    logging:  %kernel.debug%

doctrine.orm:
    auto_generate_proxy_classes: %kernel.debug%
    mappings:
        HelloBundle: ~

# To disable a service, just comment out the whole block