Hi, I tried the dev version and the following now doesn't work (in both mysql and postgres) while in 4.0 it worked fine.

$books = $this->orm->books->findBy([
    'tags->id' => 1,
    'publisher->name' => 'Nextras publisher A'
]);
Assert::same($books->count(), 1);

MySQL: Unknown column 'publisher.name' in 'having clause'
Postgres: ERROR: column "publisher.name" must appear in the GROUP BY clause or be used in an aggregate function

It's probably solvable by using simple JOIN for publisher table and including publisher.name in ON clause.

Originally posted by @stepapo in #526 (comment)