Fetching Items from a ManyToMany Collection

Hello. i Need a little help. I have really long loading of my symfony webpage on localhost. FIrewall probably taking the most as u can see on screenshort. Is there someone who probably know how to fix it ? I tryind all thinks from internet but nothing works its taking like 6 seconds to load 1 page and thats bad if u want to test somehing new :) http://imgur.com/a/8X0YO
My controller : https://pastebin.com/1xcSeLjw

Please help me :) Thanks

Hey, I've been looking what you did here, but I applied to my own project and didn't work.. I don't know what I am doing wrong.... I have posted the question in stackOverflow but seems that nobody is answering, I need help :( https://stackoverflow.com/q...

Hi,
The download button on this page https://knpuniversity.com/s... is serving the wrong video file, it's serving the EP07 instead of EP06

Hi.
I have the following ManyToMany relationship:

Posts - Tags.

# AppBundle/Entity/Post
    /**
     * @ORM\ManyToMany(targetEntity="Tag", inversedBy="posts")
     * @ORM\JoinTable(name="post_tag")
     */
    private $tags;

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

    public function addTags(Tag $tag)
    {
    if($this->tags->contains($tag)){ return; }
    $this->tags[] = $tag;
    }

    /**
     * @return ArrayCollection|Tag[]
     */
     public function getTags() { return $this->tags; }

     /**
      * @param ArrayCollection $tags
      * @return Post
      */
      public function setTags($tags)
      {
    $this->tags = $tags;
    return $this;
      }

# AppBundle/Entity/Tag

/**

 * @ORM\ManyToMany(targetEntity="Post", mappedBy="tags")
 * @ORM\JoinTable(name="post_tag")
 */
private $posts;

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

public function addPosts(Post $post)

{
    if($this->posts->contains($post)){
        return;
    }
    $this->posts[] = $post;
}

/**

 * @return ArrayCollection|Post[]
 */
 public function getPosts() { return $this->posts; }

 /**
  * @param ArrayCollection $posts
  */
 public function setPosts($posts)
 {
$this->posts = $posts;
return $this;
 }

I have a CRUD controller for my Post entity, generated with $ php bin/console doctrine:generate:crud

I have a PostType form, generated with $ php bin/console doctrine:generate:form AppBundle:Post

All I need is to be able to attache, for each new post that I create, a list of corresponding tags. I want to add the tags, by using select2 jquery plugin. ( https://select2.github.io/ ).

My problem is that I can't figure out a way to get all the tags available in the database, and put them in a select html element, in the /post/new template. Or better I should say that I implemented a way, but I have the feeling it's not the right way to do it, as when I click the "Create" button, to create a new post, my browser freezes (firefox), chrome is behaving almost the same, when I try to print_r($form->getData()).

# AppBundle/Form/TagType

$builder->add('name');

# AppBundle/Form/PostType

$builder->add(

$builder->create('tags', FormType::class, ['by_reference'=>false]) ->add(

'tag',EntityType::class,[

                    'class' => 'AppBundle:Tag',
                    'placeholder' => ' ',
                    'query_builder' => function (EntityRepository $er) {
                        return $er->createQueryBuilder('t')
                            ->orderBy('t.name', 'ASC');
                    },
                    'choice_label' => 'name',
                ])
        );

# app/Resources/views/post/new.html.twig

<div class="form-group">

            {{ form_label(form.tags.tag) }}
            {{ form_errors(form.tags.tag) }}
            {{ form_widget(form.tags.tag, { attr: { class: 'form-control select2-multi', title:'Choose a Tag', multiple:'multiple' } }) }}
        </div>

# AppBundle/Controller/PostController

/**

 * Creates a new Post entity.
 *
 * @Route("/new", name="post_new")
 * @Method({"GET", "POST"})
 */
public function newAction(Request $request)
{

    $post = new Post();
    $form = $this->createForm('AppBundle\Form\PostType', $post);
    $form->handleRequest($request);
    if ($form->isSubmitted() && $form->isValid()) {
        $tag = $post->getTags();
        echo var_dump($tag);die;

}
}

In `PostController` I need to get all the tags sent through the /post/new form, explode them, and then add them to the $post object, then save the $post object to the database.

Right now, as I already said, if I run this in the browser, I get a HUGE representation of the form

What I'm doing wrong?

Here's a part of the output: http://imgur.com/t6TXo9Q

Sorry for this long post, but I have no more solutions ,and thanks for any tip.

Hi Guys:

how does the view know genusScientist.id is User ID not genus ID

{% for genusScientist in genus.genusScientists %}
                            <li class="list-group-item">
                                <a href="{{ path('user_show', {
                                    id : genusScientist.id
                                }) }}">
                                    {{ genusScientist.fullName }}
                                </a>
                            </li>
                        {% endfor %}

Is it because of this?

/**
     * @return ArrayCollection|User[]
     */
    public function getGenusScientists()
    {
        return $this->genusScientists;
    }

If this is the reason, then I ArrayCollection| Genus [], it would give me genus ID instead. or does it works?

Hi guys:

I tried to dump the user object. And I could not find any ArrayCollection inside studiedGenuses.
as you can see -elements: [] is empty
How does symfony do the magic and accessing genusStudied.name?

array:2 [▼
  "user" => User {#353 ▼
    -id: 74
    -email: "aquanaut4@example.org"
    -password: "$2y$13$XuPa.HYwBc23Dwa6FlaN3Op4f3J4kpMcdGbMb5/PELlIrgxb9elxq"
    -plainPassword: null
    -roles: []
    -isScientist: true
    -firstName: "Hector"
    -lastName: "Wisozk"
    -avatarUri: "http://lorempixel.com/100/100/abstract/?37466"
    -universityName: "Blanda-O'Conner University"
    -studiedGenuses: PersistentCollection {#393 ▼
      -snapshot: []
      -owner: User {#353}
      -association: array:17 [ …17]
      -em: EntityManager {#282 …11}
      -backRefFieldName: "genusScientists"
      -typeClass: ClassMetadata {#355 …}
      -isDirty: false
      #collection: ArrayCollection {#394 ▼
        -elements: []
      }
      #initialized: false
    }
  }
  "app" => AppVariable {#413 ▶}
]

Hey folks,

thanks for this awesome site & your style.

Greetings from Germany