Support data binding for CollectionType

[u0816]

Running this code doesn't prefill the group fields:

class PersonGroupType extends AbstractGroupType
{
    public function build(): void
    {
        $this->add('first_name', TextType::class);
        $this->add('last_name', TextType::class);
    }
}

$data = [
    'people' => [
        ['first_name' => 'Peter', 'last_name' => 'Parker']
    ]
];

$builder = new FormBuilder([
    'key' => 'collection_example',
    'method' => 'POST',
    'html_validation' => false,
], $data);

$builder->add('people', CollectionType::class, ['entry_type' => PersonGroupType::class]);    
$builder->add('send_message', 'submit');
$form = $builder->getForm();

The method CollectionType::buildEntry could pass the data to the children:

private function buildEntry(int $position = 0, $data = null): TypeInterface
{
    $entryType = $this->entryType;
    /** @var TypeInterface $entry */
    $entry = new $entryType($this->entryOptions);
    $entry
        ->setParent($this)
        ->setName($this->name)
        ->setPosition($position)
    ;

    if ($entry->getLabel() === null) {
        $entry->setLabel($this->getHumanName());
    }

    $entry->build();

    if (\func_num_args() > 0) {
        $entry->setData($data);

        //NEW
        if(is_array($data)) {
            foreach ($entry->all() as $child) {
                if(isset($data[$child->getName()])) $child->setData($data[$child->getName()]);
            }
        }
        
    }

    return $entry;
}  

[andyexeter]

Hey there,

Thanks for reporting this and providing a fix!

I've created a PR for this: #14 - could you test it and see if it resolves the issue for you?

If you want to install the PR branch via composer you can run the following command:

composer require palmtree/form:dev-13-support-data-binding-for-collectiontype