将服务注入EntityRepository是个好主意吗？

Question

I'm working on my own ORM with Entity and EntityRepository classes

In any ORM i explored injecting any services into Entities is realy bad idea. But there's a question: is it good idea to inject service into Repository?

There's abstract example:

//$user is object of Entity class in ORM
//we need to get actual valid entities here
$relatedEntities = $user->getRelatedEntities();
//where getRelatedEntities() calls method of RelatedEntityRepository

RelatedEntityRepository {
    private $injectedService;

    public function getByUserId($userId){
        if(!$this->injectedService->hasValidUserData($userId)){
            $this->injectedService->doSomething($userId);
        }
        return $this->getFromDbByUserId($userId)
    }
    private function getFromDbByUserId($userId){
        //returns data from DB
    }
}