Get the last value of a entity field with condition - php

Question

I'm making a website for performance monitoring.
I have 2 tables:
Users table linked in one-to-Many with performances
Performances table linked in Many-to-one with users table
I just wanna get the last weight which is not null in my table performances and display it in twig
database screenshot
For exemple in this database, the result would be : 80
I tried with queries but I get an arror message so I don't know how to do
Thanks in advance for your help !

Answer 1

I hope this could helps you.
I suppose you have a repository class for your Performance entity. I would use this kind of code for a Symfony3 application
<?php
namespace AppBundle\Repository; //replace AppBundle by the name of your bundle
use Doctrine\ORM\Tools\Pagination\Paginator;
/**
* PerformanceRepository
*
* This class was generated by the Doctrine ORM. Add your own custom
* repository methods below.
*/
class PerformanceRepository extends \Doctrine\ORM\EntityRepository
{
public function getLastWeigth()
{
$qb = $this->getEntityManager()->createQueryBuilder()
->select('p')
->from($this->_entityName, 'p')
->expr()->isNotNull('p.weight')
->orderBy('p.date', 'desc')
->setMaxResults(1);
$query = $qb->getQuery();
$result = $query->getSingleResult();
return $result;
}
}
Edit: here is an Exemple of use in the controller in a Symfony 3 application:
<?php
namespace AppBundle\Controller\Performance;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use AppBundle\Repository\PerformanceRepository;
class PerformanceController extends Controller
{
public function lastWeightAction()
{
$repo = $this->getDoctrine()->getManager()->getRepository('AppBundle:Performance');
$lastPerformance = $repo->getLastWeigth();
//some other code
}
}
Edit2:
If you need to get the last weight by a user Id:
class PerformanceRepository extends \Doctrine\ORM\EntityRepository
{
public function getLastWeigth($userId)
{
$qb = $this->getEntityManager()->createQueryBuilder()
->select('p')
->from($this->_entityName, 'p')
->join('p.user', 'u')
->where('u.id = :userId')
->expr()->isNotNull('p.weight')
->orderBy('p.date', 'desc')
->setMaxResults(1);
->setParameter(':userId', $userId);
$query = $qb->getQuery();
$result = $query->getSingleResult();
return $result;
}
}