you should provide a doc PR

I've created a PR on the documentation for this feature.

In case anyone can't wait for this feature to be merged (or is still using 2.1), here's a FormTypeExtension that provides the same feature https://gist.github.com/4666086 .

What about a more generic prototype-option ?

@vicb there is already options to pass option for all children. There is not a lot of options where it makes sense to distinguish the prototype or other children IMO (but the data is one as the prototype does not have mapped data)

Are nesting or user defined options some uc ? (note to myself: merge)

ping

@gimler this is a new feature, and 2.2 is in its RC cycle. So it would have to wait for 2.3. The priority currently is to stabilize 2.2, not to merge PRs for 2.3

Does any more work need doing to this other than updating the test that @pborreli mentioned? It would be great to get this in 2.1 as well as 2.2 if possible.

ref #6350

ref #3825

@bschussek Will this addition get into 2.3?

No. 2.3 is in feature freeze.

This I know, I just wanted to ping again to get the state. Its pending now for some time, hope that it will quickly get in.

also looking for this feature
is there any way to set default values for prototype object?

@Venzon As said above, it is easy to do it usign a type extension waiting for it to be merged. See the gist linked by @adrienbrault

@stof thanks a lot, I did not notice this gist

@adrienbrault @stof
I did try to use CollectionTypeExtension (https://gist.github.com/4666086) by @adrienbrault but it does not work for me. Is my implementation somehow wrong? Defining prototype_data option inside TagType does not work aswell. Please help ^^

$builder->add('tags', 'collection', array(
    'type' => new TagType(),
    'allow_add' => true,
    'allow_delete' => true,
    'prototype_data' => function() {
        $object = new Tag();
        $object->setName('test')->setIsActive(true);
        return $object;
    },
));

Inside TagType class

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'Acme\TaskBundle\Entity\Tag',
        'prototype_data' => function() {
            $object = new Tag();
            $object->setName('test')->setIsActive(true);
            return $object;
        },
    ));
}

Closed in favor of #9177

@bschussek I'm not sure the related issue would allow fixing it: it should overwrite the data option only for the prototype, not for all children