Set User Preference from checkbox Symfony

I need help. I have 3 entities: Customer OneToMany Preference ManyToOne Typology.

Customers must be able to set their own user 'Preferences' via a 'Typologies' checkbox. Preferences can be changed when the user wants it.

The form should show preferences in the db as checked.

I'm new of Symfony and I don't know how to do this. How do I build the form? How can I handle data in db?

Here the entities:

Preference.php

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Preference
 *
 * @ORM\Table(name="preference", indexes={@ORM\Index(name="fk_preference_typology1_idx", columns={"typology_id"}), @ORM\Index(name="fk_preference_customer1_idx", columns={"customer_id"})})
 * @ORM\Entity
 */
class Preference
{
    /**

     *
     * @ORM\Column(name="id", type="integer", length=45)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="date", type="datetime", nullable=true)
     */
    private $date;

    /**
     * @var \AppBundle\Entity\Customer
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Customer")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="customer_id", referencedColumnName="id")
     * })
     */
    private $customer;

    /**
     * @var \AppBundle\Entity\Typology
     *
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Typology")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="typology_id", referencedColumnName="id")
     * })
     */
    private $typology;

    /**
     * @return Customer
     */
    public function getCustomer()
    {
        return $this->customer;
    }

    /**
     * @param Customer $customer
     */
    public function setCustomer($customer)
    {
        $this->customer = $customer;
    }

    /**
     * @return Typology
     */
    public function getTypology()
    {
        return $this->typology;
    }

    /**
     * @param Typology $typology
     */
    public function setTypology($typology)
    {
        $this->typology = $typology;
    }


}

Typology.php

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Typology
 *
 * @ORM\Table(name="typology")
 * @ORM\Entity
 */
class Typology
{
    /**
     * @var integer
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="value", type="string", length=100, nullable=false)
     */
    private $value;


}

Thanks