symfony2和twig：获取表单字段的属性

Question

I am trying to create a form with sub-fields with symfony2.

In twig I render the form as

    {{ form_start(form) }}

      {{ form_errors(form) }}
      <div>
      {{ form_label(form) }}
      {{ form_errors(form) }}

      {% for field in form %}
            {{ form_widget(field) }}
      {% endfor %}

      </div>

    {{ form_end(form) }}

However, I want to add some customization depending on the field I am rendering.

What I want to achieve is something like this:

    {{ form_start(form) }}

      {{ form_errors(form) }}
      <div>
      {{ form_label(form) }}
      {{ form_errors(form) }}

      {% for field in form %}
          {% if field.label == "myvalue" %}  <-- this code is not working
            {# do something here #}
            {{ form_widget(field) }}
          {% endif %}
      {% endfor %}

      </div>

    {{ form_end(form) }}

I am not able to access the label of each of my sub-fields in twig.
I think it is possible with something like {{ field.vars.something }} , but I did not manage to find any clear documentation about this.

Can someone please help?
Thank you!

Edit:

I actually found the answer to my question: It was indeed just {{ field.vars.label }}

and

          {% if field.vars.label == "myvalue" %}
            {# do something here #}
            {{ form_widget(field) }}
          {% endif %}

did the trick. However, I am still looking for some good documentation about this "vars" attribute in twig, and what can be retrieved with it.

Thanks!

Answer 1

You'll find more information at http://symfony.com/doc/current/reference/forms/twig_reference.html#more-about-form-variables

On that page you'll find a list of common form vars. You might also create custom vars by implementing the buildView method of a FormType. You can read an example at http://symfony.com/doc/current/cookbook/form/create_form_type_extension.html#adding-the-extension-business-logic

Hope it'll help