button like/dislike with symfony 3 - ajax

Question

I have in my patient space, a list of doctors with whom he has made an appointment.And next to each doctor, I want to add a button I like so that the patient can tell if he liked or not the consultation with the doctor.
And I would like to know the number of patients who have liked a given doctor. For this number to be displayed in the doctor's details.
Here is my controller where I have my list of doctors
Controller
public function patientBookingListAction(Request $request)
{
$em = $this->getDoctrine()->getManager();
$medecin = $em->getRepository("DoctixMedecinBundle:Medecin")->findOneBy(array(
'user' => $this->getUser(),
));
$patient = $em->getRepository("DoctixPatientBundle:Patient")->findOneBy(array(
'user' => $this->getUser(),
));
$bookings = $em->getRepository("DoctixFrontBundle:Booking")->findBy(array(
"patient" => $patient
));
$bookings = $this->get('knp_paginator')->paginate($bookings, $request->query->get('page', 1), 3);
return $this->render('DoctixPatientBundle:Patient:bookings.html.twig', array(
'bookings' => $bookings
));
}
I had already create my table favorite_doctor :
Entity favorite_doctor
class MedecinFavoris
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity="Doctix\PatientBundle\Entity\Patient", inversedBy="medecin_favoris")
* #ORM\JoinColumn(name="patient_id", referencedColumnName="id")
*/
private $patient;
/**
* #ORM\ManyToOne(targetEntity="Doctix\MedecinBundle\Entity\Medecin", inversedBy="medecin_favoris")
* #ORM\JoinColumn(name="medecin_id", referencedColumnName="id")
*/
private $medecin;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set patient
*
* #param \Doctix\PatientBundle\Entity\Patient $patient
*
* #return MedecinFavoris
*/
public function setPatient(\Doctix\PatientBundle\Entity\Patient $patient = null)
{
$this->patient = $patient;
return $this;
}
/**
* Get patient
*
* #return \Doctix\PatientBundle\Entity\Patient
*/
public function getPatient()
{
return $this->patient;
}
/**
* Set medecin
*
* #param \Doctix\MedecinBundle\Entity\Medecin $medecin
*
* #return MedecinFavoris
*/
public function setMedecin(\Doctix\MedecinBundle\Entity\Medecin $medecin = null)
{
$this->medecin = $medecin;
return $this;
}
/**
* Get medecin
*
* #return \Doctix\MedecinBundle\Entity\Medecin
*/
public function getMedecin()
{
return $this->medecin;
}
}
I would like that when I click on the button like that my data is saved in this table.
Twig
{% for booking in bookings %}
<div class="list_general" id="liste">
<ul>
<li>
<figure><img src="{{ vich_uploader_asset(booking.medecin.media, 'imageFile') }}"
alt="{{ booking.medecin.media.imagename }}"></figure>
<h4>Dr. {{ booking.medecin.user.prenom|capitalize }} {{ booking.medecin.user.nom|upper }} <i class="pending">Pending</i></h4>
<ul class="booking_details">
<li><strong>Date et heure</strong>{{ booking.dateHeureRdv|date('d/m/Y') }}</li>
<li><strong>Heure</strong>{{ booking.dateHeureRdv|date('H:i') }}</li>
<li><strong>Motif</strong>Consultation</li>
<li><strong>Téléphone</strong>{{ booking.medecin.user.numTel }}</li>
<li><strong>Email</strong>{{ booking.medecin.user.username }}</li>
</ul>
<ul class="buttons">
<li><i class="fa fa-fw fa-check-circle-o"></i> Déplacer Rdv</li>
<li><i class="fa fa-fw fa-times-circle-o"></i> Annuler</li>
</ul>
</li>
<div class="like">
Like
</div>
</ul>
</div>
{% endfor %}
Now i do not know exactly what to do when i click the like button. Knowing that when a patient like, the data must register in the database and the like button must also disappear to no longer allow him to vote two or more times.
Thanks a lot