Upgrading Doctrine Migrations - symfony

Question

I am getting this warning on my codebase, here's my composer
Package zendframework/zend-eventmanager is abandoned, you should avoid using it. Use laminas/laminas-eventmanager instead.
So I needed to upgrade Doctrine Migrations bundle, but I can't seem to upgrade it, and I can't find an upgrade log.
First I get errors about Doctrine\DBAL\Migrations\AbstractMigration, so I replaced them all to Doctrine\Migrations\AbstractMigration. Now I'm getting
Compile Error: Declaration of Application\Migrations\Version20170927104049::up(Doctrine\DBAL\Schema\Schema $schema) must be compatible with Doctrine\Migrations\AbstractMigration::up(Doctrine\DB
AL\Schema\Schema $schema): void
I asked for a CHANGELOG https://github.com/doctrine/DoctrineMigrationsBundle/issues/296
But anyhelp would be greatly appreciated

Answer 1

The error tells you your function is not compatible with the abstract function, did you forget to add the return type to your function?
make it:
public function up(Schema $schema) : void
{}

Answer 2

You should start by upgrading your packages through composer upgrade - for example, in your composer.lock, you are using ocramius/proxy-manager in a version of that bundle that is nearly three years old, and this requires the abandoned package. The name change from zendframework/zend-eventmanager to laminas/laminas-eventmanager has happened in 2019.
A next step might be to upgrade the constraints such that you require even newer packages. For example, there are much more recent versions of doctrine/doctrine-migrations-bundle or symfony/swiftmailer-bundle, and updating them from time to time helps to avoid problems. As the gap between the installed version and a more recent version gets larger and larger, the upgrading process gets more complex too.
On the other hand: if your code is still working properly, you can simply ignore that warning. It tells you that the given package will not receive any updates after all, but that does not mean you are in danger immediately