This § of the Symfony2 documentation shows an awesome technique for customizing an individual field. I'm using it a lot but there is one particular Type for which I'm having a hard time doing the customization : the CollectionType() Customizing the collection itself is quite easy, you can do something like this:
{% block _mynamespace_mybundle_mytype_mycollectionfield_row %}
{% if prototype is defined %}
{% set attr = attr|merge({'data-prototype': form_widget(prototype) }) %}
{% endif %}
{% spaceless %}
<ul {{ block('widget_container_attributes') }}>
{% spaceless %}
{{ form_errors(form) }}
{% for child in form %}
<li>
{{form_widget(child)}}
</li>
{% endfor %}
{% endspaceless %}
{{ form_rest(form) }}
</ul>
{% endspaceless %}
{% endblock %}
But how can you customize each element of the collection ? And how can you customize the data-prototype using Twig (the data-prototype is a special attribute used to add new items with js)?
I tried doing something like this (for the data-prototype):
{% block _mynamespace_mybundle_mytype_mycollectionfield_$$name$$_row %}
customization ok!
{% endblock %}
But I get errors, because I don't know how to escape the $
Regarding the items, I tried many things:
{% block _mynamespace_mybundle_mytype_mycollectionfield_item_subfield_row %}
customization ok!
{% endblock %}
{% block _mynamespace_mybundle_mytype_mycollectionfield_element_subfield_row %}
customization ok!
{% endblock %}
None of them work.
