Symfony 3 OneToMany relationship error

Question

i'm trying to create a OneToMany form, and the symfony profiler throws an entity error, here's the code:

Tasks.php

<?php

namespace ShopBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;
/**
 * 
 *
 * @ORM\Entity
 * @ORM\Table(name="task")
 */
class Tasks
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    /**
     * @ORM\Column(type="string", nullable=true,length=100)
     * 
     */
    protected $description;
    /**
     * @ORM\OneToMany(targetEntity="ShopBundle\Entity\Tags", cascade={"all"}, mappedBy="name")
     */
    protected $tags;

    public function __construct()
    {
        $this->tags = new ArrayCollection();
    }

    public function getId()
    {
        return $this->id;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function getDescription()
    {
        return $this->description;
    }

    public function setDescription($description)
    {
        $this->description = $description;
    }

    public function getTags()
    {
        return $this->tags;
    }

    public function addTag(Tags $tag)
    {
        $this->tags->add($tag);
    }

    public function removeTag(Tags $tag)
    {
        $this->tags->removeElement($tag);
    }
}

this is the Tags.php

<?php

namespace ShopBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
 * 
 * @ORM\Entity
 * @ORM\Table(name="tag")
 */
class Tags
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;
    /**
     * @ORM\ManyToOne(targetEntity="ShopBundle\Entity\Tasks", inversedBy="tags")
     * @ORM\JoinColumn(name="task")
     */
    protected $name;

    public function getId()
    {
        return $this->id;
    }

    public function setId($id)
    {
        $this->id = $id;
    }

    public function getName()
    {
        return $this->name;
    }

    public function setName($name)
    {
        $this->name = $name;
    }
}

the profiler throws 2 errors: The association ShopBundle\\Entity\\Tasks#tags refers to the owning side field ShopBundle\\Entity\\Tags#name which is not defined as association, but as field.

and

The association ShopBundle\\Entity\\Tasks#tags refers to the owning side field ShopBundle\\Entity\\Tags#name which does not exist.

it saves the data into the database, but i can't get the data from the database

Answer 1

Firstly check what debug CLI tells you:

php bin/console doctrine:schema:validate

Look at this example from Doctrine docs One-To-Many, Bidirectional

In Tags@JoinColumn you should add also field name of fields in entity Tasks , which you want to be connected with. ( referencedColumnName )

Also I can see that $name is not a field, where you want to keep this mapped entity? Try to add another field with name of entity instead of putting annotations before $name (btw. it's also misleading to expect Tag name, but getting Entity Task ).

For example :

// Tags.php

/**
 * @ManyToOne(targetEntity="ShopBundle\Entity\Tasks", inversedBy="tags")
 * @JoinColumn(name="task_id", referencedColumnName="id")
 */
 protected $task;

Then remember to change also mapping in Tasks entity:

// Tasks.php

/**
 * @ORM\OneToMany(targetEntity="ShopBundle\Entity\Tags", 
 * cascade={"all"}, mappedBy="task")
 */
 protected $tags;

Finally update your schema:

php bin/console doctrine:schema:update --force

Hope it helps