what’s the “ compatibility between ObjectManager and EntityManagerInterface ” in Symfony after update Doctrine?

I have an error after having tried an update ( composer update ) in my Symfony project.

I looked for a solution and I found it was necessary to modify the use and the type-hint in the entity and the constructor.. which I have done!

Then, I restarted an update but a different error occurred and the update was not fully completed.

Result: my site is down and a compatibility error is displayed.

watch this:

Compile Error: Declaration of AppDataFixturesAppFixtures::load(DoctrineORMEntityManagerInterface $manager) must be compatible with DoctrineCommonDataFixturesFixtureInterface::load(DoctrineCommonPersistenceObjectManager $manager) in AppFixtures.php line 8`

I don’t understand, what the compatibility is?

I don’t know how to post my code.. ( controllers, YAML, entity, .. ) but I got try. my project is on GitHub before the bug, maybe it can be useful ( if you need..)

here my AppFixtures.php :

<?php

namespace AppDataFixtures;

use DoctrineBundleFixturesBundleFixture;
use DoctrineORMEntityManagerInterface;

class AppFixtures extends Fixture
{
    public function load(EntityManagerInterface $manager)
    {
        // $product = new Product();
        // $manager->persist($product);

        $manager->flush();
    }
}

Answer

In your base class Fixture $manager instance of DoctrineCommonPersistenceObjectManager, so you need change EntityManagerInterface to ObjectManager. You cannot override typehint in children class.