OneToMany Doctrine Symfony2 relationship issue - php

Question

I have got a problem with OneToMany relation, I have user which can donate blood so he can have many blood donations, my application works fine but in my profiler I have 2 errors.
From Users Entity:
The association AppBundle\Entity\Users#userDonation refers to the owning side field AppBundle\Entity\UserDonates#id which is not defined as association, but as field.
The association AppBundle\Entity\Users#userDonation refers to the owning side field AppBundle\Entity\UserDonates#id which does not exist.
and from UserDonates:
The mappings AppBundle\Entity\UserDonates#userId and AppBundle\Entity\Users#userDonation are inconsistent with each other.
Here are my entities:
UserDonates:
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity="Users", inversedBy="userDonation")
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
protected $userId;
/**
* #var string
*
* #ORM\Column(name="place", type="string", length=255)
*/
private $place;
/**
* #var date
* #ORM\Column(name="donation_date", type="date")
*/
private $donation_date;
/**
* #var string
* #ORM\Column(name="donation_type", type="string", length=255)
*/
private $donation_type;
/**
* #var integer
* #ORM\Column(name="blod_donated", type="integer")
*/
private $blood_donated;
Users:
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\OneToMany(targetEntity="UserDonates", mappedBy="id", cascade={"persist","remove"})
*/
protected $userDonation;
/**
* #ORM\OneToOne(targetEntity="UserInfo", cascade={"persist","remove"})
*/
private $profil;
//__construct() from FOSUserBundle
public function __construct(){
parent::__construct();
}
Users entity is also related to UserInfo with OneToOne relation.

Answer 1

I see two issues here.
The association AppBundle\Entity\Users#userDonation refers to the owning side field AppBundle\Entity\UserDonates#id which is not defined as association, but as field.
The inverse side of your User::$userDonation association is not the id field, but the userId field in the UserDonation entity. The mapping should look like this:
/**
* Here! -----------------------------------------------v
* #ORM\OneToMany(targetEntity="UserDonates", mappedBy="userId", cascade={"persist","remove"})
*/
protected $userDonation;
As a side note, I'd suggest naming the userId attribute user instead; after all it will contain an actual user object, and not just a user's ID.
The association AppBundle\Entity\Users#userDonation refers to the owning side field AppBundle\Entity\UserDonates#id which does not exist.
Your UserDonates::$id attribute is private. All properties managed by Doctrine need to be protected in order for Doctrine to be able to populate them with data.