Odtnhj

I have an entity Institution. In a form a user can select one or more. I use Select2 for the font-end. An institution has the attribute internationalName, which is the default attribute because of:

Institution.php

public function __toString()

 return $this->internationalName;

An institution can also have an abbreviated name, as attribute abbreviation. What I would like, is to use this second attribute to show (if it exists) in the select form. Even better would be that it's not shown but that you can search for it, but I really don't know if this is possible at all.

I could change __toString() so that it includes the abbreviation, but this is unwanted because of other forms, so I am trying to make it show only in this form through

LocationType.php

->add('Institutions', EntityType::class, [
 'class' => Institution::class,
 'label' => 'Connected Institution(s)',
 'multiple' => true,
 'attr' => ['data-select' => 'true', 'data-placeholder' => 'start typing to find your institution...'],
 'constraints' => array(
 new Count(array(
 'min' => 1,
 'minMessage' => "Select at least one institution."))),
 'query_builder' => function (EntityRepository $er) 
 return $er->createQueryBuilder('i')
 ->orderBy('i.internationalName', 'ASC');
 ,

I tried to use 'choice_label' => 'abbreviation' (just as a test), but that makes all labels blank, which I really don't understand why. I also tried 'choice_label' => 'internationalName'.'abbreviation', but that won't work because there is no property internationalNameabbreviation. I thought about creating a new attribute where I combine the two, but given that 'choice_label' => 'abbreviation' already results in a blank list I don't think this would work. Any other options or solutions?

edit: as requested the relevant entity class part,
Institution.php

/**
 * @AssertNotBlank(message="Please enter the international name.")
 * @ORMColumn(type="string")
 */
private $internationalName;

/**
 * @ORMColumn(type="string", nullable=true)
 */
private $abbreviation;

Maybe something like:

https://symfony.com/doc/current/reference/forms/types/choice.html#choice-value

 ->add('Institutions', EntityType::class, [
 'class' => Institution::class,
 'label' => 'Connected Institution(s)',
 'query_builder' => function (EntityRepository $er) 
 return $er
 ->createQueryBuilder('i')
 ->orderBy('i.internationalName', 'ASC')
 ;
 ,
 'choice_value' => function (Institution $institution = null) 
 return $institution ? $institution->getInternationalName() . '(' . $institution->getAbbreviation() . ')' : '';
 ,
 ])