If the entity exists in the array, it shows an add or delete button

I have the entities Travel , Favorites and User , each user can add a trip to their favorites list.

When displaying a list of all trips, I would like if the trip is already in the list of favorites, so show the (delete) button, and if not in the list, then show (add to favorites).

In the action controller, I made a queryBuilder to get a list of all the currently authenticated favorites and put the result in ($ favorite) .

    public function listAction($page, Request $request)
    {
    $em = $this->getDoctrine()->getManager();

    // code of boutton add to or remove from favorite
    $user = $this->getUser(); // this is a function to verify if user is AUTHENTICATED_REMEMBERED
    if($user) {
    $favorite = $em->getRepository('ProjectTravelBundle:Favorite')->getFavoriteByUser($user);
    }
    else{
    $favorite = '';
    }

    $paginator  = $this->get('knp_paginator');

    $qb = $em->getRepository('ProjectTravelBundle:Travel')->getListTravelsFrontend();
    $nb = $qb->getQuery()->getResult();

    $pagination = $paginator->paginate(
        $qb,
        $request->query->get('page', $page),10);


    return $this->render('ProjectFrontendBundle:Travel:travel-list-view.html.twig',array(
        'pagination' => $pagination,
        'nb' => $nb,
        'favorite' =>$favorite, // list of favorites of current user 
    ));
}

      

        
        
        
      

    

The solution I am thinking is to check if the move is in the array (favorites) , so show boutton remove and if not show boutton add, but I could not do that in show.twig

{% for travel in pagination %}
//..................

{% if is_granted('IS_AUTHENTICATED_REMEMBERED') %}

{% if travel.id not in favorite %}
    <span><a href="{{ path('frontend_travel_add_favorite', {'id': travel.id} ) }}" class="pull-right button btn-small red">Add to favorite</a></span>
{% else %}
    <span><a href="{{ path('frontend_travel_delete_favorite', {'id': favorite.id} ) }}" class="pull-right button btn-small red">Remove from</a></span>
{% endif %}

// if user is not AUTHENTICATED_REMEMBERED
{% else %}
<span><a href="{{ path('frontend_travel_add_favorite', {'id': travel.id} ) }}" class="pull-right button btn-small red">Add to favorite</a></span>
{% endif %}

//..........
{% endfor %}

      

        
        
        
      

    

Repository: queryBuilder

    // get list of favorite of current user
    public function getFavoriteByUser($user)
    {
        $qb = $this->createQueryBuilder('f')
            ->Where('f.user = '.$user);

        return $qb->getQuery()->getResult();
    }

      

        
        
        
      

    

UPDATED

FavoriteEntity

class Favorite
{
/**
 * @var integer
 *
 * @ORM\Column(name="id", type="integer")
 * @ORM\Id
 * @ORM\GeneratedValue(strategy="AUTO")
 */
private $id;

/**
 * @ORM\ManyToOne(targetEntity="Project\UserBundle\Entity\User")
 * @ORM\JoinColumn(nullable=false)
 */
protected $user;

/**
 * @ORM\ManyToOne(targetEntity="Project\TravelBundle\Entity\Travel", inversedBy="favorites")
 * @ORM\JoinColumn(nullable=false)
 */
protected $travel;


/**
 * Get id
 *
 * @return integer 
 */
public function getId()
{
    return $this->id;
}

/**
 * Set user
 *
 * @param \Project\UserBundle\Entity\User $user
 * @return Favorite
 */
public function setUser(\Project\UserBundle\Entity\User $user)
{
    $this->user = $user;

    return $this;
}

/**
 * Get user
 *
 * @return \Project\UserBundle\Entity\User 
 */
public function getUser()
{
    return $this->user;
}


/**
 * Set travel
 *
 * @param \Project\TravelBundle\Entity\Travel $travel
 * @return Favorite
 */
public function setTravel(\Project\TravelBundle\Entity\Travel $travel)
{
    $this->travel = $travel;

    return $this;
}

/**
 * Get travel
 *
 * @return \Project\TravelBundle\Entity\Travel 
 */
public function getTravel()
{
    return $this->travel;
}
}

      

        
        
        
      

    

TravelEntity

class Travel
{
/....

/**
 * @ORM\OneToMany(targetEntity="Project\TravelBundle\Entity\Favorite", mappedBy="travel", cascade={"remove"})
 */
private $favorites; 


public function __construct()
{
    $this->favorites = new \Doctrine\Common\Collections\ArrayCollection();
}

/...........
/**
 * Add favorites
 *
 * @param \Project\TravelBundle\Entity\Favorite $favorites
 * @return Travel
 */
public function addFavorite(\Project\TravelBundle\Entity\Favorite $favorites)
{
    $this->favorites[] = $favorites;
    $favorites->setTravel($this);
    return $this;
}

/**
 * Remove favorites
 *
 * @param \Project\TravelBundle\Entity\Favorite $favorites
 */
public function removeFavorite(\Project\TravelBundle\Entity\Favorite $favorites)
{
    $this->favorites->removeElement($favorites);
}

/**
 * Get favorites
 *
 * @return \Doctrine\Common\Collections\Collection 
 */
public function getFavorites()
{
    return $this->favorites;
}