如何使用Doctrine2对相关的表记录进行计数

Question

I'm quite new to doctrine, And i want to carry out a certain task.

I have jobs table with category_id column, And obviously categories table.

In Symfony2, I have this repository

<?php

namespace Ibw\JobeetBundle\Repository;

use Doctrine\ORM\EntityRepository;

class CategoryRepository extends EntityRepository
{
    public function getWithAllJobs()
    {
        $qb = $this->createQueryBuilder('c')
                    ->select('c, j')
                    ->leftJoin('c.jobs', 'j');
        return $qb->getQuery()->getResult();
    }

}

Now when i get the result of getWithAllJobs function, It returns all categories even if it have no jobs related.

I want to only return the categories with related jobs. I'm thinking of counting c.jobs and select categories with c.jobs more than 0 or something. How to do that in doctrine ?

And if there's a better way, What is it ?

Answer 1

The only right way to do what you want is using inner join instead of left join . Your code should look like this:

    $qb = $this->createQueryBuilder('c')
                ->select('c, j')
                ->innerJoin('c.jobs', 'j');