[Form] "empty_value => true" and "required => false" won't render an empty value for document Field Type

[mrohnstock]

$builder->add('name', 'document', array('class' => 'test\TestBundle\Document\Name', 'multiple' => true, 'empty_value' => true, 'required' => false, 'label' => 'Name:', 'query_builder' => function(DocumentRepository $dm) { return $dm->createQueryBuilder()->sort('name', 'asc');},));

Will render all documents, that got fetched by query_builder, but not an empty value in select-form-field.
Only setting 'required' => false or 'empty_value' => true results to the same issue.

Tested with 2.0.6 and 2.1.0-dev (from today).

[mrohnstock]

adding the following to the twig-view, creates the empty value:

{{ form_widget(form.name, { 'empty_value' : '' }) }}

but choosing the empty value makes the form invalid.

[stof]

The document type is provided by DoctrineMongoDBBundle so please open the issue there instead.

Btw, we are currently refactoring the Doctrine bridge to make it more generic so the MongoDBBundle will soon be able to reuse the classes from the bridge which have been updated to handle the empty value.