How to add a field/parameter on primary key? - php

Question

I work with Symfony2.0 and Doctrine, and I created this entity:
class MetaInformationsQuestionUser
{
/**
* #ORM\Id
* #ORM\ManyToOne(targetEntity="Myproject\Bundle\UserBundle\Entity\User")
*/
private $user;
/**
* #ORM\Id
* #ORM\ManyToOne(targetEntity="Myproject\Bundle\QuestionsBundle\Entity\MetaInformationsQuestion")
*/
private $metainformationsquestion;
/**
* #var datetime $created
*
* #Gedmo\Timestampable(on="create")
* #ORM\Column(type="datetime")
*/
private $created;
/**
* #var datetime $updated
*
* #Gedmo\Timestampable(on="update")
* #ORM\Column(type="datetime")
*/
private $updated;
/**
* #var array $score
*
* #ORM\Column(name="score", type="array", nullable="true")
*/
private $score;
So this entity is a link for a many-to-many relation with attributes. (in this case, the score and creation and update dates).
My idea is to add a record of every question that each user plays, with the score he gets.
My problem is that I get this error:
SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1-3' for key 'PRIMARY'
So my question is: How can I add for example the create date to the primary key, or just remove the fact to have a primary key on this?

Answer 1

Ok I got it,
I needed to add:
* #ORM\Id
In my created field:
/**
* #var datetime $created
*
* #ORM\Id
* #Gedmo\Timestampable(on="create")
* #ORM\Column(type="datetime")
*/
private $created;
It made what I wanted!
Here are the documentation:
https://doctrine-orm.readthedocs.org/en/latest/reference/annotations-reference.html#annref-id