Why doesn't manyToMany binding work in symfony 2?

Question

symfony

There are two tables, company and rubric, and a company_rubric relationship table, each company can have multiple categories and each category can also have multiple companies. they are linked by id.
Here is what I wrote (I only insert what is relevant to the connections):

RG\JuristBundle\Entity\Company:
    type: entity
    table: company

    manyToMany:
        rubrics:
            targetEntity: Rubric
            inversedBy: companies
            joinTable:
               name: jurist.company_rubric


RG\JuristBundle\Entity\Rubric:
    type: entity
    table: rubric
   
    manyToMany:
        companies:
            targetEntity: Company
            mapped_by: rubrics
            joinTable:
              name: jurist.company_rubric
              joinColumns:
                rubric_id:
                  referencedColumnName: id
              inverseJoinColumns:
                company_id:
                  referencedColumnName: id

added to the corresponding Entities:

class Rubric{
private $companies;

    public function __construct()
    {
        $this->companies = new ArrayCollection();
    }
}

class Company{
    private $rubrics;
    public function __construct()
    {
        $this->rubrics = new ArrayCollection();
    }
}

When in the controller I try to get categories or companies like this:
$em = $this->getDoctrine()->getEntityManager();
$entity = $em->getRepository('RGJuristBundle:Rubric')->find($id);
Arrays that should be filled with data due to links remain empty. Maybe I wrote something wrong or I'm doing something wrong? I've never dealt with symphony before, so it's hard to figure it out.

Answer 1

0. there is a tag for inserting code
1. clear the cache
2. ./app/console doctrine:schema:validate and show the result

Answer 2

manyToMany:
        rubrics:
            targetEntity: Rubric
            mappedBy: companies

targetEntity: Company
inversedBy: rubrics
joinColumns:
   name: rubric_id
   referencedColumnName: id
inverseJoinColumns:
   name: company_id
   referencedColumnName: id

doctrine-orm.readthedocs.org/projects/doctrine-orm...