[#DDC-2109] Duplicate joinTableColumns mapping for ManyToMany with resolve target entity

I use the resolve target entity listener quite often for generic code. However I found an issue with ManyToMany relationships, when the target entity is modified by the listener.

The problem is that the _validateAndCompleteManyToManyMapping in PersistentCollection duplicate the joinTableColumns, so this means that when creating an entity, Doctrine send twice the number of parameters, which of course fail.

public function testAssertTableColumnsAreNotAddedInManyToMany()
    {
        $evm = $this->em->getEventManager();
        $this->listener->addResolveTargetEntity(
            'Doctrine\Tests\ORM\Tools\ResolveTargetInterface',
            'Doctrine\Tests\ORM\Tools\ResolveTargetEntity',
            array()
        );
        $this->listener->addResolveTargetEntity(
            'Doctrine\Tests\ORM\Tools\TargetInterface',
            'Doctrine\Tests\ORM\Tools\TargetEntity',
            array()
        );
        $evm->addEventListener(Events::loadClassMetadata, $this->listener);
        $cm = $this->factory->getMetadataFor('Doctrine\Tests\ORM\Tools\ResolveTargetEntity');
        $meta = $cm->associationMappings['manyToMany'];

        $this->assertSame('Doctrine\Tests\ORM\Tools\TargetEntity', $meta['targetEntity']);
        $this->assertEquals(array('resolvetargetentity_id', 'targetinterface_id'), $meta['joinTableColumns']);
    }

[DDC-2109] Duplicate joinTableColumns mapping for ManyToMany with resolve target entity Created: 31/Oct/12 Updated: 12/Nov/12 Resolved: 12/Nov/12
Status:	Resolved
Project:	Doctrine 2 - ORM
Component/s:	ORM
Affects Version/s:	2.3
Fix Version/s:	2.3.1
Security Level:	All

[DDC-2109] Duplicate joinTableColumns mapping for ManyToMany with resolve target entity Created: 31/Oct/12 Updated: 12/Nov/12 Resolved: 12/Nov/12