Symfony UniqueEntity for two Fields doesn't work - php

Question

I want to use an Unique entity over the fields companyID and personMailaddress.
When I use just the personMail in the fields it works without any problems. But when I add another field to the array, like below, it ignores my UniqueEntity.
/**
* person
*
* #ORM\Table(name="person")
* #ORM\Entity(repositoryClass="AppBundle\Repository\personRepository")
* #ORM\HasLifecycleCallbacks()
* #UniqueEntity(
* fields={"personMail", "companyID"},
* errorPath="personMail",
* message="ERROR_MAIL_DUPLICATE",
* )
* #Serializer\ExclusionPolicy("all")
*/
class person
{
...
/**
* #ORM\ManyToOne(targetEntity="company", inversedBy="persons")
* #ORM\JoinColumn(name="company", referencedColumnName="id", nullable=true)
*
*/
protected $companyID;
/**
* #var string
*
* #ORM\Column(name="personMail", type="string", length=150)
* #Assert\NotBlank(message="ERROR_MAIL_EMPTY")
*
* #Serializer\Expose
*/
private $personMail;

Answer 1

To enable unique you need to add the UniqueEntity validator and add unique to the column definition.
<?php
use Doctrine\ORM\Mapping as ORM,
Doctrine\Common\Collections\ArrayCollection;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity,
Symfony\Component\Validator\Constraints as Assert;
/**
* person
*
* #ORM\Table(name="person")
* #ORM\Entity(repositoryClass="AppBundle\Repository\personRepository")
* #ORM\HasLifecycleCallbacks()
* #UniqueEntity(
* fields={"personMail", "companyID"},
* errorPath="personMail",
* message="ERROR_MAIL_DUPLICATE",
* )
* #Serializer\ExclusionPolicy("all")
*/
class person
{
...
/**
* #ORM\Column(name="companyId", type="integer", unique=true)
* #ORM\ManyToOne(targetEntity="company", inversedBy="persons")
* #ORM\JoinColumn(name="company", referencedColumnName="id", nullable=true)
*
*/
protected $companyID;
/**
* #var string
*
* #ORM\Column(name="personMail", type="string", length=150, unique=true)
* #Assert\NotBlank(message="ERROR_MAIL_EMPTY")
*
* #Serializer\Expose
*/
private $personMail;