Symfony 4 - Difficults with ChoiceType function - symfony

Question

I've a Symfony 4 project.
My users can submit holidays.
There are several types of leave (illness, overtime, etc.), and for each of these types, they have a balance.
When they submit a leave, they must choose from the list of leave types the type they wish. But I want to display in this list only those whose balance is greater than 0.
So, in my form I've:
->add('typeConge', EntityType::class, [
'class' => TypeConge::class,
'label' => false,
'placeholder' => "Type d'absence",
'choice_label' => 'nom',
])
And in my User entity, I've the function to take only typeConges with positive balance:
public function getSoldesActif()
{
$soldesTypesConge = $this->soldeConges;
foreach ($soldesTypesConge as $solde) {
if ($solde->getSolde() == 0) {
$soldesTypesConge->removeElement($solde);
}
}
return $soldesTypesConge;
}
But even with the documentation, I don't understand how can I affect this list ?
Can someone help me please ?

Answer 1

You can use the query_builder-option on the entity type to specify which entities are displayed.
It should probably look roughly, something like this:
->add('typeConge', EntityType::class, [
'class' => TypeConge::class,
'label' => false,
'placeholder' => "Type d'absence",
'choice_label' => 'nom',
'query_builder' => function(EntityRepository $repo) {
$builder = $repo->createQueryBuilder('typeConge');
return $builder->where('typeConge.solde > 0');
},
])
The query builder is responsible for which entities are fetched and then displayed in the list. By default it will fetch all entities and with the query_builder-option you can restrict this to your liking using the ORM-query builder from Doctrine.
There is also an example in the docs, you can use as reference: https://symfony.com/doc/current/reference/forms/types/entity.html#ref-form-entity-query-builder