Symfony3 "SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'catId' cannot be null " - php

Question

I'm trying to save data with ManyToOne relations in a DataFixtures class. And I get this error on saving data.
Please, help me.
Sources:
Entity/DealsCategory.php:
<?php
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
* DealsCategory
*
* #ORM\Table(name="deals_category")
* #ORM\Entity(repositoryClass="AppBundle\Repository\DealsCategoryRepository")
*/
class DealsCategory
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="alias", type="string", length=50, nullable=true)
*/
private $alias;
/**
* #ORM\OneToMany(targetEntity="DealsCategoryLang", mappedBy="category")
*/
protected $categoryLang;
/**
* #return mixed
*/
public function getCategoryLang()
{
return $this->categoryLang;
}
/**
* #param DealsCategoryLang $categoryLang
*/
public function setCategoryLang(DealsCategoryLang $categoryLang = null)
{
$this->categoryLang = $categoryLang;
}
/**
* #param DealsCategoryLang $categoryLang
*/
public function setOneCategoryLang(DealsCategoryLang $categoryLang)
{
$this->categoryLang[] = $categoryLang;
}
/**
* DealsCategory constructor.
*/
public function __construct()
{
$this->categoryLang = new ArrayCollection();
}
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set alias
*
* #param string $alias
*
* #return DealsCategory
*/
public function setAlias($alias)
{
$this->alias = $alias;
return $this;
}
/**
* Get alias
*
* #return string
*/
public function getAlias()
{
return $this->alias;
}
}
Entity/DealsCategoryLang.php:
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* DealsCategoryLang
*
* #ORM\Table(name="deals_category_lang")
* #ORM\Entity(repositoryClass="AppBundle\Repository\DealsCategoryLangRepository")
*/
class DealsCategoryLang
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var int
*
* #ORM\Column(name="catId", type="integer")
*/
private $catId;
/**
* #var string
*
* #ORM\Column(name="lang", type="string", length=10)
*/
private $lang;
/**
* #var string
*
* #ORM\Column(name="title", type="string", length=70)
*/
private $title;
/**
* #ORM\ManyToOne(targetEntity="DealsCategory", inversedBy="categoryLang", cascade={"persist"})
* #ORM\JoinColumn(name="catId", referencedColumnName="id")
*
*/
protected $category;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set catId
*
* #param integer $catId
*
* #return DealsCategoryLang
*/
// public function setCatId($catId)
// {
// $this->catId = $catId;
//
// return $this;
// }
/**
* Get catId
*
* #return int
*/
public function getCatId()
{
return $this->catId;
}
/**
* Set lang
*
* #param string $lang
*
* #return DealsCategoryLang
*/
public function setLang($lang)
{
$this->lang = $lang;
return $this;
}
/**
* Get lang
*
* #return string
*/
public function getLang()
{
return $this->lang;
}
/**
* Set title
*
* #param string $title
*
* #return DealsCategoryLang
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
}
DataFixtures/ORM/LoadCategories.php
<?php
namespace AppBundle\DataFixtures\ORM;
use AppBundle\Entity\DealsCategory;
use AppBundle\Entity\DealsCategoryLang;
use Doctrine\Common\DataFixtures\FixtureInterface;
use Doctrine\Common\Persistence\ObjectManager;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\DependencyInjection\ContainerAwareInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
class LoadCategories implements FixtureInterface, ContainerAwareInterface
{
private $container;
/**
* Load data fixtures with the passed EntityManager
*
* #param ObjectManager $manager
*/
public function load(ObjectManager $manager)
{
$category = new DealsCategory();
$categoryLang = new DealsCategoryLang();
$categoryLang->setLang('en');
$categoryLang->setTitle('Food and Drinks');
$category->setOneCategoryLang($categoryLang);
$manager->persist($category);
$manager->persist($categoryLang);
$manager->flush();
}
public function setContainer(ContainerInterface $container = null)
{
$this->container = $container;
}
}
I've tried it in different ways, but it's still not working. Tell me please, what i am doing wrong?
UPD:
my errors are:
[Doctrine\DBAL\Exception\NotNullConstraintViolationException]
An exception occurred while executing 'INSERT INTO deals_category_lang (catId, lang, title) VALUES (?, ?, ?)' with params [null, "en", "Food and Drinks"]:
SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'catId' cannot be null
[Doctrine\DBAL\Driver\PDOException]
SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'catId' cannot be null
PDOException]
SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'catId' cannot be null
I am running the fixtures through the command line:
php bin/console doctrine:fixtures:load --append

Answer 1

Ok, I resolved it...
The problem was in my Fixture class:
Instead of
$category->setOneCategoryLang($categoryLang);
I should put the
$categoryLang->setCategory($category);
,respecting the hierarchy of my entities' relations :(