Symfony entity type can not set select value, placeholder was selected

Question

I am calling entity to provide drop down options. I set a place holder value. I tried setting the data value, but regardless placeholder value is alway tag with selected.

My PostFormType:

public function buildForm(FormBuilderInterface $builder, array $options) {

    $builder
        ->add('title', TextType::class, array( 'attr' => array(
            'class' => 'form-control'
        )))
        ->add('price', TextType::class, array( 'attr' => array(
            'class' => 'form-control'
        )))
        ->add('artist', EntityType::class, [
            'data'=>2,
            'placeholder'=>'Choose Artist',
            'class'=>Artist::class,
            'choice_label'=>'artist',
            'query_builder'=> function (EntityRepository $er) {
                return $er->createQueryBuilder('artist')
                    ->orderBy('artist.artist', 'ASC');
            },

            'empty_data'  => null,
            'attr' => array(
                'class' => 'form-control'
            )
        ])

        ->add('userId', HiddenType::class )
        ->add('description', TextareaType::class, array( 'attr' => array(
            'class' => 'form-control'
        )))
        ->add('purchaseDate','date')
        ->add('id',HiddenType::class)
    ;
}

Jeet · Accepted Answer · 2017-03-01 04:38:45Z

0

You shouldn't configure data for property artist if it has to be modified by user in the form.

In case you want to set the default value of a new Entity. Even if you do, the change from UI form will not affect as the data attribute will reset the value to 2 as provided after submit.

You can always use Constructor of the relevant Entity to set any default value.

But, as artist is a referenced property. You should do it in Controller before you build the form.

$artist = $em->getRepository("AppBundle:Artist")->find(2);
$entity->setArtist($artist)
// Load the form here. The default value automatically set in the form

Hope this helps!

answered Mar 1, 2017 at 4:38

Jeet

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Comments

Musa Haidari · Accepted Answer · 2023-12-08 22:05:23Z

I had the same issue using symfony 6.3, and could solve it with the following modifications:

First: while adding artist to form:

Set mapped: true
Remove value: 2, as this will reset your artist field value to 2 each time is form is rendered, regardless of your submitted value previously
Set 'choice_value' => fn($c) => $c, to tell use the entity artist as the choice value

Second: to convert the entity artist to a scalar value, implement __toString() in your artist model

Third: add a view transformer to transform the ID of artist to artist entity once form is submitted:

        $builder->get('artist')
            ->addViewTransformer(
                new CallbackTransformer(
                    function (?string $modelData): ?Artist {
                        if ($modelData === null) {
                            return null;
                        }
                        return $this->artistRepository->find((int)$modelData);
                    },
                    function ($formData) {
                        return $formData;
                    },
                )
            );

Forth:: While creating the form in your controller, pass in the submitted value, suppose you form's method is GET:

        $queryParameters = $request->query->all();
        $searchForm = $this->createForm(ArtistType::class, $queryParameters);
        $searchForm->handleRequest($request);

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