Send choice Value instead choice key from Symfony form - symfony

Question

I need to send from Symfony form ChoiceType::class
But I don't need choices keys, I need to send choices values.
Is that is possible?
$form->add('section', ChoiceType::class, array(
'mapped' => false,
'choices' => array(
1 => 'value1',
2 => 'value2'
),
));
I just want to send value1 if I chose value1,
not key 1 as default.

Answer 1

You can use
array_flip ($array)
refer to php docs

Answer 2

[Since Symfony 2.7] In any case you can play with choice value through choice_value option and a Closure function (Reference):
$form->add('section', ChoiceType::class, array(
'choice_value' => function ($value, $key, $index) {
return $value;
}
));
Useful for dynamic choices.

Answer 3

You just need to reverse it. Also, I don't think you need 'mapped'.
Try this:
$form->add(
'section',
ChoiceType::class,
[
'choices' => [
'value1' => 1,
'value2' => 2,
],
]
);
It should work.

Answer 4

Mayby a bit late but i've made this and it works perfect. Without array_flip. Mayby for someone it 'll be usefull.
$dataUsers = [];
$users = [
['id' => 1, 'firstname' => 'joe', 'lastname' => 'doe'],
['id' => 2, 'firstname' => 'will', 'lastname' => 'fog'],
];
foreach ($users as $u) {
$dataUsers[] = (object)['id' => $u['id'], 'label' => $u['firstname']];
}
$builder
->add('users', ChoiceType::class, [
'choices' => $dataUsers,
'choice_label' => function ($value) {
if (is_object($value)) {
return $value->label;
} else {
return 0;
}
},
'choice_value' => function ($value) {
if (is_object($value)) {
return $value->id;
} else {
return 0;
}
},
'data' => (object)[ 'id' => 2]
]);