i have a relation ManyToMany between two entities Doctor and insurance.
I configured my annotation ManyToMany in the entity Doctor, and in my table, Doctrine has created another separate doctor_insurance table.
now I would like to use the image attribute of an insurance to which the doctor is affiliated in my twig, but I do not know how to use this attribute

Entity Doctor

/**
 * @ORMManyToMany(targetEntity="DoctixMedecinBundleEntityAssurance", cascade="persist", "remove")
 * @ORMJoinColumn(nullable=true)
 */
private $assurance;

 public function __construct()

 $this->assurance = new ArrayCollection();


 /**
 * Add assurance
 *
 * @param DoctixMedecinBundleEntityAssurance $assurance
 *
 * @return Medecin
 */
public function addAssurance(DoctixMedecinBundleEntityAssurance $assurance)

 $this->assurance = $assurance;

 return $this;


/**
 * Remove assurance
 *
 * @param DoctixMedecinBundleEntityAssurance $assurance
 */
public function removeAssurance(DoctixMedecinBundleEntityAssurance $assurance)

 $this->assurance->removeElement($assurance);


/**
 * Get assurance
 *
 * @return DoctrineCommonCollectionsCollection
 */
public function getAssurance()

 return $this->assurance;

Entity Assurance

 <?php

namespace DoctixMedecinBundleEntity;

use DoctrineORMMapping as ORM;

 /**
 * Assurance
 *
 * @ORMTable(name="assurance")
 * 
 */
 class Assurance
 
 /**
 * @var int
 *
 * @ORMColumn(name="id", type="integer")
 * @ORMId
 * @ORMGeneratedValue(strategy="AUTO")
 */
private $id;

 /**
 * @var string
 *
 * @ORMColumn(name="nom", type="string", length=40)
 */
public $nom;

 /**
 * @ORMOneToOne(targetEntity="DoctixMedecinBundleEntityLogo", cascade="persist","remove","refresh")
 * @ORMJoinColumn(nullable=true)
 */
private $logo;



/**
 * Get id
 *
 * @return integer
 */
public function getId()

 return $this->id;


/**
 * Set nom
 *
 * @param string $nom
 *
 * @return Assurance
 */
public function setNom($nom)

 $this->nom = $nom;

 return $this;


/**
 * Get nom
 *
 * @return string
 */
public function getNom()

 return $this->nom;


/**
 * Set logo
 *
 * @param DoctixMedecinBundleEntityMedia $logo
 *
 * @return Assurance
 */
public function setLogo(DoctixMedecinBundleEntityMedia $logo = null)

 $this->logo = $logo;

 return $this;


/**
 * Get logo
 *
 * @return DoctixMedecinBundleEntityMedia
 */
public function getLogo()

 return $this->logo;

Controller

 public function parametreAction(Request $request)


 $em = $this->getDoctrine()->getManager();
 $repo = $em->getRepository('DoctixMedecinBundle:Medecin');


 $medecin = $repo->findOneBy(array(
 'user' => $this->getUser(),
 ));

 $medecin->getAssurance();

 return $this->render('DoctixMedecinBundle:Medecin:parametre.html.twig', array(
 'medecin' => $medecin
 ));

Twig

 <div class = "col-md-2">
 <div class="box_list photo-medecin">
 <figure>
 <img src=" vich_uploader_asset(medecin.assurance, 'logoFile') 
 " class="img-fluid" alt=""> 
 </figure>

 </div>

Thanks

Assurance means Guarantee / To be sure, So It is more likely you are after Insurance which is protection against a possible eventuality.

Also you called the first entity Doctor, but used it as Medicine, so please change this if doctor is medicine.

You need to revise your entities as they are completely wrong:

Doctor

use DoctixMedecinBundleEntityInsurance;
use DoctrineCommonCollectionsArrayCollection;
use DoctrineCommonCollectionsCollection;
use DoctrineORMMapping as ORM;

class Doctor

 // ...

 /**
 * @ORMManyToMany(targetEntity="Insurance", mappedBy="doctors" cascade="persist", "remove")
 * @ORMJoinColumn(nullable=true)
 */
 private $insurances;

 public function __construct()
 
 $this->insurances = new ArrayCollection();
 

 public function addInsurance(Insurance $insurance)
 
 if (!$this->insurances->contains($insurance))
 
 $this->insurances->add($insurance);
 $insurance->addDoctor($this);
 
 

 public function removeInsurance(Insurance $insurance)
 
 if ($this->insurances->contains($insurance))
 
 $this->insurances->removeElement($insurance);
 $insurance->removeDoctor($this);
 
 

 /**
 * @return Collection
 */
 public function getInsurances()
 
 return $this->insurances;
 

 // ...

Insurance

use DoctixMedecinBundleEntityDoctor;
use DoctrineCommonCollectionsArrayCollection;
use DoctrineCommonCollectionsCollection;
use DoctrineORMMapping as ORM;

class Insurance

 // ...

 /**
 * @ORMManyToMany(targetEntity="Doctor", inversedBy="insurances")
 * @ORMJoinColumn(nullable=true)
 */
 private $doctors;

 public function __construct()
 
 $this->doctors = new ArrayCollection();
 

 public function addDoctor(Doctor $doctor)
 
 if (!$this->doctors->contains($doctor))
 
 $this->doctors->add($doctor);
 $doctor->addInsurance($this);
 
 

 public function removeDoctor(Doctor $doctor)
 
 if ($this->doctors->contains($doctor))
 
 $this->doctors->removeElement($doctor);
 $doctor->removeInsurance($this);
 
 

 /**
 * @return Collection
 */
 public function getDoctors()
 
 return $this->doctors;
 

 // ...

Update

Controller

public function parametreAction(Request $request)

 $em = $this->getDoctrine()->getManager();
 $doctor = $em->getRepository('DoctixMedecinBundle:Medecin')->findOneBy(array(
 'user' => $this->getUser(),
 ));

 return $this->render('DoctixMedecinBundle:Medecin:parametre.html.twig', array(
 'doctor' => $doctor
 ));

Twig

<div class="col-md-2">
 <div class="box_list photo-medecin">
 % for insurance in doctor.insurances %
 <figure>
 <img src=" vich_uploader_asset(insurance.logo, 'logoFile') 
 " class="img-fluid" alt=""> 
 </figure>
 % endfor %
 </div>
</div>

<div class = "col-md-2">
% for item in medecin.assurance %
<div class="box_list photo-medecin">
 <figure>
 <img src=" vich_uploader_asset(item.logo , 'logoFile') 
 " class="img-fluid" alt=""> 
 </figure>
% endfor %
</div>