Question

How can I execute this query using QueryBuilder in Symfony 2

SELECT um.id, sv.patentgroup_id, pm.portfolio_id, pp.id
FROM sv_patents sv
LEFT JOIN pm_patentgroups pm ON sv.patentgroup_id = pm.id
LEFT JOIN pm_portfolios pp ON pm.portfolio_id = pp.id
LEFT JOIN um_users um ON pp.user_id

The associations in entity classes are defined as

In SvPatents I have

 /**
 * @var PmPatentgroups
 *
 * @ORM\ManyToOne(targetEntity="PmPatentgroups")
 * @ORM\JoinColumns({
 *   @ORM\JoinColumn(name="patentgroup_id", referencedColumnName="id")
 * })
 */
private $patentgroup;

In PmPatentgroups I have

/**
 * @var PmPortfolios
 *
 * @ORM\ManyToOne(targetEntity="PmPortfolios")
 * @ORM\JoinColumns({
 *   @ORM\JoinColumn(name="portfolio_id", referencedColumnName="id")
 * })
 */
private $portfolio_id;

In PmPortfolios I have

/**
 * @var UmUsers
 *
 * @ORM\ManyToOne(targetEntity="UmUsers")
 * @ORM\JoinColumns({
 *   @ORM\JoinColumn(name="user_id", referencedColumnName="id")
 * })
 */
private $user;

I tried this but it is giving me the whole results from the table looks like joins are not working propoerly

$repository = $this->getDoctrine()->getRepository('MunichInnovationGroupBundle:SvPatents');
        $qb = $repository->createQueryBuilder('sv')
        ->leftJoin('sv.patentgroup','pm')
        ->leftJoin('pm.portfolio_id','pp')
        ->leftJoin('pp.user','um')
        ->getQuery();
        $patents = $qb->getArrayResult();

I am quite new to Symfony2 and Doctorine2. I read the whole documentation but could not find such complex example actually i am bit confused with how the querybuilder build the query. It would be great if you explain it a little in simple words

Thanks in advance

Answer 1

I found the solution to my problem. If u looks for the records of a specific user in the table then you need to add one where clause. This is how your query should looks like

$user_id = 1;
        $repository = $this->getDoctrine()->getRepository('MunichInnovationGroupBundle:SvPatents');
        $qb = $repository->createQueryBuilder('sv')
        ->select('sv')
        ->leftJoin('sv.patentgroup','pm')
        ->leftJoin('pm.portfolio_id','pp')
        ->leftJoin('pp.user','um')
        ->where('pp.user = :user_id')
        ->setParameter('user_id', $user_id)
        ->getQuery();
        $patents = $qb->getArrayResult();

Thats all 🙂