仅显示当前用户的关系

showing only current user's relations

我有 2 个实体,用户和课程,每个学生可以有很多课程,每个课程可以有很多学生。无论如何,我正在努力做到这一点,以便当用户连接到他的帐户时,它会向他显示与他相关的所有课程。我知道我必须通过我的控制器来完成,但我如何才能只获得与他相关的控制器。 我的实体

<?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;
    }


}

好吧,因为您显然具有双向关系(inversedBy 和 mappedBy),所以您不需要做任何特殊的事情。 Doctrine 已经做到了这一点。只需在控制器中抓取用户:

// 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();

并根据您的喜好迭代他们的相关课程:

foreach ($user->getCourses() as $course) {

}

因为 getCourses 也是 returns 一个 Collection 实例,您还可以使用集合 [=22] 附带的 ->map->filter 函数=]...