How to set default selected option for Entity Type select? - forms

Question

so I'm trying to set a selected option in my form but I can't seem to find out how to do this. I've Googled around and everything seems to be for Symfony2 where default was a thing, this seems to be no longer the case for Symfony4.
I've tried using data and empty_data but both don't select the correct value..
# weirdly, setting to ['guru'] gets undefined index error,
# setting to $options doesn't error
->add('guru', EntityType::class, array(
'class' => User::class,
'choice_label' => 'username',
'data' => $options['guru']
))
and how I pass $options:
$form = $this->createForm(EditCategoryType::class, array('guru' => $guruName));

Answer 1

So with the help of #Juan I. Morales Pestana I found an answer, the only reason I've added the below as an answer rather than marking his as correct was because there seems to be a slight difference in how it works now..:
Controller now reads (Thanks to #Juan):
$category = $this->getDoctrine()->getRepository(Category::class)->find($id);
$category->setGuru($category->getGuru());
$form = $this->createForm(EditCategoryType::class, $category);
My EditCategoryType class:
->add('guru', EntityType::class, array(
'class' => User::class,
'choice_label' => 'username',
'mapped' => false,
'data' => $options['data']->getGuru()
))
updated twig template:
{{ form_widget(form.guru, { 'attr': {'class': 'form-control'} }) }}

Answer 2

<a href="{{ path('register_new', { idpackage: p.id }) }}" class="btn_packages">
//sends to form type the package id
$fromPackage = '';
if($request->query->get('idpackage')) {
$fromPackage = $request->query->get('idpackage');
}
$form = $this->createForm(RegisterFormType::class, $register, ['fromPackage' => $fromPackage]);
in formType set the param in options:
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => Register::class,
'fromPackage' => null
]);
}
->add('package',EntityType::class, [
'label' => 'Select one item',
'class' => Package::class,
'choice_label' => function($package) {
return $package->getTitle() . ' | crédits : ' . $package->getAmount();
},
'attr' => ['class' => 'input-text', ],
'placeholder' => '...',
'required' => false,
'choice_attr' => function($package) use ($idFromPackage) {
$selected = false;
if($package->getId() == $idFromPackage) {
$selected = true;
}
return ['selected' => $selected];
},
])

Answer 3

$parentCategory = $categoryRepository->repository->find(2);
$category = new Category();
$category->setParentCategory(parentCategory);
$form = $this->createForm(CategoryType::class, $category);
we chose the predefined top category, it works if you use it this way.

Answer 4

try this :
empty_data documentation

Answer 5

As I said in my comments you are doing something wrong. I will explain all the process:
calling the form in the controller
$person = new Person();
$person->setName('My default name');
$form = $this->createForm('AppBundle\Form\PersonType', $person);
$form->handleRequest($request);
then the createForm function is executed here is the code
Symfony\Bundle\FrameworkBundle\Controller\ControllerTrait
protected function createForm($type, $data = null, array $options = array())
{
return $this->container->get('form.factory')->create($type, $data, $options);
}
As you can see the data or options are nos setted directly in the form, another function is called and then the form is created
This is the result when I make a dump inside the PersonType
PersonType.php on line 20:
array:35 [▼
"block_name" => null
"disabled" => false
"label" => null
"label_format" => null
"translation_domain" => null
"auto_initialize" => true
"trim" => true
"required" => true
"property_path" => null
"mapped" => true
"by_reference" => true
"inherit_data" => false
"compound" => true
"method" => "POST"
"action" => ""
"post_max_size_message" => "The uploaded file was too large. Please try to upload a smaller file."
"error_mapping" => []
"invalid_message" => "This value is not valid."
"invalid_message_parameters" => []
"allow_extra_fields" => false
"extra_fields_message" => "This form should not contain extra fields."
"csrf_protection" => true
"csrf_field_name" => "_token"
"csrf_message" => "The CSRF token is invalid. Please try to resubmit the form."
"csrf_token_manager" => CsrfTokenManager {#457 ▶}
"csrf_token_id" => null
"attr" => []
"data_class" => "AppBundle\Entity\Person"
"empty_data" => Closure {#480 ▶}
"error_bubbling" => true
"label_attr" => []
"upload_max_size_message" => Closure {#478 ▶}
"validation_groups" => null
"constraints" => []
"data" => Person {#407 ▼ // Here is the data!!!
-id: null
-name: "My default name"
-salary: null
-country: null
}
]
As you can see the data is indexed at data so that is the reason why you get an undefined index error
So the proper way is to set the entity value from the controller or use your form as a service and call the repository and set the value using the data option which has not changed since version 2. My point is that you are using the form wrong.
Please change your code.
Hope it help
EDITED IN THE SYMFONY 4 WAY(with out namespaces bundles)
Let's see please, I have a Person Entity with a name just for this example
The controller
$person = new Person(); //or $personsRepository->find('id from request')
$person->setName('My default name');
$form = $this->createForm(PersonType::class, $person);
$form->handleRequest($request);
The form
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('name',TextType::class,[
//'data' => 'aaaaa' // <= this works too
]);
}
The options array value which proves that you are accessing wrong
PersonType.php on line 20:
array:35 [▼
"block_name" => null
"disabled" => false
"label" => null
"label_format" => null
"translation_domain" => null
"auto_initialize" => true
"trim" => true
"required" => true
"property_path" => null
"mapped" => true
"by_reference" => true
"inherit_data" => false
"compound" => true
"method" => "POST"
"action" => ""
"post_max_size_message" => "The uploaded file was too large. Please try to upload a smaller file."
"error_mapping" => []
"invalid_message" => "This value is not valid."
"invalid_message_parameters" => []
"allow_extra_fields" => false
"extra_fields_message" => "This form should not contain extra fields."
"csrf_protection" => true
"csrf_field_name" => "_token"
"csrf_message" => "The CSRF token is invalid. Please try to resubmit the form."
"csrf_token_manager" => CsrfTokenManager {#457 ▶}
"csrf_token_id" => null
"attr" => []
"empty_data" => Closure {#480 ▶}
"error_bubbling" => true
"label_attr" => []
"upload_max_size_message" => Closure {#478 ▶}
"validation_groups" => null
"constraints" => []
"data" => Person {#407 ▼
-id: null
-name: "My default name" //Here is the data
-salary: null
-country: null
}
]
AppBundle is just another folder in my folder structure. Be pleased to test your self. The second parameter to the formCreate function is the entity or data not the options you are thinking that the options is the data.