Method setSQLLogger deprecated - Doctrine\DBAL\Configuration - php

Question

I am in the process of upgrading an application from Symfony 5.4 to Symfony 6.0. Along the way, I had to upgrade some doctrine libraries.
We are currently using setSQLLogger(null) to avoid having SQL logging enabled. By using the newer version of Doctrine, I am getting a warning:
The Doctrine\DBAL\Configuration::setSQLLogger method is deprecated (Use {#see setMiddlewares()} and {#see \Doctrine\DBAL\Logging\Middleware} instead.).
I could not figure out how can I replace setSQLLogger(null) with setMiddlewares so I could disable the SQL logging.
Did anyone have this issue and managed to fix it?
Thanks.

Answer 1

I replaced this code:
$em->getConnection()->getConfiguration()->setSQLLogger(null);
With:
$em->getConnection()->getConfiguration()->setMiddlewares([new \Doctrine\DBAL\Logging\Middleware(new \Psr\Log\NullLogger())]);
This puts the NullLogger as the only middleware.

Answer 2

You should configure a middleware in order to accept the NullLogger, then use it along with setMiddlewares method.
So from symfony standpoint, you can do something like
# configuration.yaml // or whatever name you have
services:
doctrine.logging.middleware.null: // or whatever name you prefer
class: Doctrine\DBAL\Logging\Middleware
autowire: false
arguments:
- #FQCN or service id of NullLogger
Then you can inject it where you were using setLogger and replace that method call with setMiddlewares.
I didn't tried it myself, as we're running on older version, but I'm pretty confident this should resolve your issue.