Doctrine: Get followed users' posts - doctrine-orm

Question

How can I retrieve all posts from users a user is following, similar to a home feed on social media.
It's pretty simple in SQL, but what does this look like in DQL?
select * from post
join friends on friend_user_id = post.from_id
where user_id = :uid
I tried plenty of approaches similar to this, but couldn't get any to work:
$this->getEntityManager()
->createQuery(
'SELECT p
FROM MyBundle:Post p
JOIN MyBundle:User u WITH p.from IN u.myFriends
WHERE u.id = :uid'
)
My User entity looks like in the documentation:
<?php
/** #Entity **/
class User
{
// ...
/**
* #ManyToMany(targetEntity="User", mappedBy="myFriends")
**/
private $friendsWithMe;
/**
* #ManyToMany(targetEntity="User", inversedBy="friendsWithMe")
* #JoinTable(name="friends",
* joinColumns={#JoinColumn(name="user_id", referencedColumnName="id")},
* inverseJoinColumns={#JoinColumn(name="friend_user_id", referencedColumnName="id")}
* )
**/
private $myFriends;
public function __construct() {
$this->friendsWithMe = new \Doctrine\Common\Collections\ArrayCollection();
$this->myFriends = new \Doctrine\Common\Collections\ArrayCollection();
}
// ...
}
And here my Post entity:
<?php
/** #Entity **/
class Post
{
// ...
/**
* #ManyToOne(targetEntity="User")
**/
private $from;
// ...
}

Answer 1

A simple Working DQL Approach is the following:
$dql = "SELECT p FROM MyBundle:Post p
WHERE p.from in
(SELECT u FROM MyBundle:User u JOIN u.friendsWithMe f where f = :user )";
$query = $em->createQuery($dql);
$query->setParameter(':user', $this->getUser());
Hope this help