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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.