user2090861 user2090861 - 1 month ago 44
PHP Question

Symfony2: Duplicate definition of column 'id' on entity in a field or discriminator column mapping

I'm having trouble using entity inheritance in Symfony2. Here are my two classes:

use Doctrine\ORM\Mapping as ORM;

/**
* @Orm\MappedSuperclass
*/
class Object
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
}


/**
* @Orm\MappedSuperclass
*/
class Book extends Object
{
}


When I run php app/console doctrine:schema:create I get the following error:

[Doctrine\ORM\Mapping\MappingException]
Duplicate definition of column 'id' on entity 'Name\SiteBundle\Entity\Book' in a field or discriminator column mapping.


What may be causing this?

Thanks :)

Update:



You are right I missed this. Now I'm using single table inheritance with both classes being entities:

/**
* @Entity
* @InheritanceType("SINGLE_TABLE")
* @DiscriminatorColumn(name="discr", type="string")
* @DiscriminatorMap({"object" = "Object", "book" = "Book"})
*/


But I still get the same error message.

Answer

Actually I found yml files in Resources/config/doctrine/, which were defining my entities, instead of just using annotations.

I removed these files and it's working now.

Thanks for your help !

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