How to get Doctrine to log queries in Symfony2

I’m pretty new to Symfony2, and I’m looking for a way to log SQL queries (including timings) to the same log file as the rest of my application.

From what I can determine from the documentation this should all work out of the box, but after a few hours of trying I can’t figure out what I’m doing wrong.

config_dev.yml

monolog:
    handlers:
        doctrine:
            action_level: debug
            type: stream
            path: %kernel.logs_dir%/%kernel.environment%_doctrine.log
            channels: doctrine

config.yml

# Doctrine Configuration
doctrine:
    dbal:
        driver:   "%database_driver%"
        host:     "%database_host%"
        port:     "%database_port%"
        dbname:   "%database_name%"
        user:     "%database_user%"
        password: "%database_password%"
        charset:  UTF8
        logging:  true
        profiling:  true

    orm:
        auto_generate_proxy_classes: "%kernel.debug%"
        auto_mapping: true

I get no log file generated at all. My other logging handler works fine (not listed here).

I’m wondering where I’ve gone wrong here, but also whether this is really the right approach or if I should implement a new class which implements the SQL Logger, as mentioned here: http://vvv.tobiassjosten.net/symfony/logging-doctrine-queries-in-symfony2/

But I’ve no idea how to plug that in via the configuration/services in order to make it apply project-wide (I don’t want to have to call it in every Controller, for example).

Many thanks for any help!

Answer

If you are really sure that you need to log doctrine 2 queries in production then you can set this up in the configs for doctrine.

connections:
        # A collection of different named connections (e.g. default, conn2, etc)
        default:
                # when true, queries are logged to a "doctrine" monolog channel
            logging: true 

http://symfony.com/doc/current/reference/configuration/doctrine.html

And config monolog to log doctrine like explained in the docs: http://symfony.com/doc/current/cookbook/logging/channels_handlers.html

A similar issue can be found at symfony 2.4 can’t get the doctrine channel in prod environment