Zend Framework 2 - Doctrine 2 Error message - doctrine-orm

Question

I have been trying to add more flexibilities to the Album Module from Zend Framework 2. In that process I have been trying to set a validator for one of the form fields especially for the album name which in my case the column name in my database is title.
I have been following the validation part from one of the previous answers to my post, which can be found here
I have been using that class in my albumcontroller class in this fashion:
<?php
namespace Album\Controller;
use Zend\Mvc\Controller\AbstractActionController;
use Zend\View\Model\ViewModel;
use Album\Entity\Album\Album;
use Album\Form\AlbumForm;
use Album\Model\Album\AlbumExists;
use Doctrine\ORM\EntityManager;
class AlbumController
extends AbstractActionController
{
public function addAction()
{
$form = new AlbumForm();
$form->get('submit')->setAttribute('value', 'Add');
$query = "SELECT a.title FROM Album\Entity\Album\Album a";
$albumExists = new AlbumExists($this->getEntityManager(), $query, 'title');
$request = $this->getRequest();
if ($request->isPost())
{
$album = new Album();
$form->setInputFilter($album->getInputFilter());
$form->setData($request->getPost());
$title = $this->getRequest()->getPost('title');
if ($form->isValid() && $albumExists->isValid($title))
{
$album->populate($form->getData());
$this->getEntityManager()->persist($album);
$this->getEntityManager()->flush();
return $this->redirect()->toRoute('album');
}
}
return array('form' => $form);
}
When I enter a album name/title which is already in the database it throws an error in this fashion:
An error occurred during execution; please try again later.
Additional information:
Doctrine\ORM\Query\QueryException
File:
C:\vendor\doctrine\orm\lib\Doctrine\ORM\Query\QueryException.php:69
Message:
Invalid parameter number: number of bound variables does not match number of tokens.
Any idea where Im making a mistake?

Answer 1

In case you're using "my" class and haven't modified that part, you're missing the WHERE condition in your query.
In the class, a parameter :value is bound, so you have to use this parameter in your query (e.g. WHERE a.title = :value).