Doctrine NOT EXIST condition with ManyToMany relation - sql

Question

I have 2 entities with a many-to-many relation as this:
User
{
/**
* #var Group[]
*
* #ORM\ManyToMany(targetEntity="Group", inversedBy="users")
* #ORM\JoinTable(
* name="user_group",
* joinColumns={
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
* },
* inverseJoinColumns={
* #ORM\JoinColumn(name="group_id", referencedColumnName="id")
* }
* )
*/
protect $groups
}
Group
{
/**
* #var User[]
*
* #ORM\ManyToMany(targetEntity="User", mappedBy="groups")
*/
private $users;
}
This creates 3 tables on DB:
user
group
user_group
Is possible to manipulate user_group in a DQL? I'm trying something like this:
SELECT *
FROM user u
WHERE EXISTS
(SELECT ug.user_id FROM user_group ug WHERE ug.user_id = u.id AND ug.group_id = 3)
This doesn't work since it should be written as Entities. I could run this with Native SQL but I wanted to be sure that there's no better solution for this

Answer 1

The solution from Jonathan Martinez worked but I found this to be more straightforward (specially because I could use NOT MEMBER OF as well):
$query = $em->createQuery('SELECT u.id FROM User u WHERE :groupId MEMBER OF u.groups');
$query->setParameter('groupId', $group);
More on this, here:
http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html#dql-select-examples

Answer 2

You can try this:
$em = $this->getDoctrine()->getManager();
$query = $em->createQueryBuilder('u')
->select('u')
->from('AppBundle:User', 'u')
->innerJoin('u.groups', 'g', 'WITH', 'g.user_id = u.id')