Symfony 3 Doctrine undefined index - php

Question

I'm trying to fetch an object from MySQL database using doctrine. It has one-to-one relation with other one. I'm getting this error: Notice: Undefined index: id
What I should correct to make this working?
My fetch code is very simple, I try to fetch all objects:
$emArt = $this->getDoctrine()->getRepository(Article::class);
$articles = $emArt->findAll();
Model is as following:
Article.php
/**
* #ORM\Entity
* #ORM\Table(name="Article")
*/
class Article
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $ID;
/**
* #ORM\OneToOne(targetEntity="ArticleTypes", inversedBy="articleTypeId")
* #ORM\JoinColumn(name="articleTypeId", referencedColumnName="id")
*/
private $articleType;
/**
* #ORM\Column(name="articleName", type="text")
*/
private $articleName;
/**
* #ORM\Column(name="content", type="text")
*/
private $content;
/**
* #ORM\Column(name="image", type="string")
* #Assert\File(mimeTypes={ "image/png" })
*/
public $image;
public function getArticleImage()
{
return $this->image;
}
public function setArticleImage($newImage)
{
$this->image = $newImage;
}
public function getArticleContent()
{
return $this->content;
}
public function setArticleContent($name)
{
$this->content = $name;
}
public function getArticleName()
{
return $this->articleName;
}
public function setArticleName($name)
{
$this->articleName = $name;
}
public function getArticleType()
{
return $this->articleType;
}
public function setArticleType($type)
{
$this->articleType = $type;
}
}
ArticleTypes.php
/**
* #ORM\Entity
* #ORM\Table(name="ArticleTypes")
*/
class ArticleTypes
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
* #ORM\OneToOne(targetEntity="Article", mappedBy="articleTypeId")
*/
private $ID;
/**
* #ORM\Column(name="articleType", type="text")
*/
private $articleType;
public function getArticleType()
{
return $this->articleType;
}
public function setArticleType($newType)
{
$this->articleType = $newType;
}
}

Answer 1

It's a PHP Notice no ? You should have also the line number in a file with the error ?
But I saw errors in your doctrine mapping too : You can't use doctrine annotation like this with fields, you should link your relationship to objects :
/**
* #ORM\Entity
* #ORM\Table(name="Article")
*/
class Article
{
/**
* #ORM\OneToOne(targetEntity="ArticleTypes", inversedBy="article")
* #ORM\JoinColumn(name="articleTypeId", referencedColumnName="id")
*/
private $articleType;
....
}
And :
/**
* #ORM\Entity
* #ORM\Table(name="ArticleTypes")
*/
class ArticleTypes
{
/**
* #ORM\Column(type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var Article $article
* #ORM\OneToOne(targetEntity="Article", mappedBy="articleType")
*/
private $article;
....
}
Even if you have a one to one relationship you can have different ids.