showing only current user's relations - symfony

Question

I have 2 entities, User and courses, each student can have many courses and each course can have many students. Anyway, I'm trying to make it so that when a user connects to his account, it shows him all the courses he's related to. I know I have to do it from my controller but how do I get only the ones he's related to.
my entities
<?php
/**
* #ORM\Entity
*/
class User implements UserInterface
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
public function getId()
{
return $this->id;
}
/**
* #ORM\ManyToMany(targetEntity="App\Entity\Courses", mappedBy="Users")
*/
private $courses;
public function __construct()
{
$this->courses = new ArrayCollection();
}
/**
* #return Collection|course[]
*/
public function getCourses(): Collection
{
return $this->courses;
}
public function addCourse(Course $course): self
{
if (!$this->courses->contains($course)) {
$this->courses[] = $course;
$course->addUser($this);
return $this;
}
return $this;
}
public function removeCourse(Course $course): self
{
if ($this->courses->contains($course)) {
$this->courses->removeElement($course);
$course->removeUser($this);
}
return $this;
}
}
<?php
/**
* #ORM\Entity(repositoryClass="App\Repository\CourseRepository")
*/
class Course
{
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(type="integer")
*/
private $id;
/**
* #ORM\Column(type="string", length=55)
*/
private $name;
/**
* #ORM\ManyToMany(targetEntity="App\Entity\user", inversedBy="courses")
*/
private $users;
public function __construct()
{
$this->users = new ArrayCollection();
}
public function getId(): ?int
{
return $this->id;
}
public function getname(): ?string
{
return $this->name;
}
public function setname(string $name): self
{
$this->name = $name;
return $this;
}
/**
* #return Collection|user[]
*/
public function getUser(): Collection
{
return $this->user;
}
public function addUser(user $user): self
{
if (!$this->users->contains($user)) {
$this->users[] = $user;
}
return $this;
}
public function removeUser(user $user): self
{
if ($this->users->contains($user)) {
$this->users->removeElement($user);
}
return $this;
}
}

Answer 1

Well, because you apparently have a bi-directional relationship (inversedBy and mappedBy) you dont need to do anything special. Doctrine has already done this. Just grab the user in the controller:
// Once you have a protected controller route,
// you can use $this->getUser() from inside the
// controller action to access the current authenticated user.
$user = $this->getUser();
And iterate as you'd like through their related courses:
foreach ($user->getCourses() as $course) {
}
Because getCourses also returns a Collection instance, you can also use the ->map and ->filter functions that ship with the Collection class...