Por el momento, he implementado soporte de campos así:
en el Tipo:
public function buildView(FormView $view, FormInterface $form, array $options)
{
$view->setAttribute('fieldsets',
array(
array(
'legend' => 'film.group.date',
'content'=> array(
'theaters_release_date',
'storage_media_release',
'storage_media_release_date',
'vod_release_date'
)),
array(
'legend' => 'film.group.country',
'content'=> array('countries')),
));
}
tengo una plantilla llamada fieldset.html.twig, que utiliza los atributos de la vista:
{% macro fieldset_block(fieldset, form) %}
<fieldset{% if fieldset.subform is defined %} class="{{ fieldset.subform }}"{% endif %}>
<legend>{{fieldset.legend | trans }}</legend>
{% if fieldset.content is defined%}
{% for row in fieldset.content %}
{{ form_row(form[row]) }}
{% endfor %}
{% endif %}
{% if fieldset.subform is defined %}
{# Couldn't get some recursivity (simply call form widget) here... too bad #}
{% if form[fieldset.subform].get('attr').fieldsets is defined %}
{% for subfieldset in form[fieldset.subform].get('attr').fieldsets %}
{{ _self.fieldset_block(subfieldset, form[fieldset.subform]) }}
{% endfor %}
{% else %}
{% for row in form[fieldset.subform] %}
{{ form_row(row) }}
{% endfor %}
{% endif %}
{% endif %}
{% if fieldset.items is defined%}
{% for fieldset in fieldset.items %}
{{ _self.fieldset_block(fieldset, form) }}
{% endfor %}
{% endif %}
</fieldset>
{% endmacro %}
{% block form_widget %}
{% for fieldset in form.get('attr').fieldsets %}
{{ _self.fieldset_block(fieldset, form) }}
{% endfor %}
{% endblock %}