在Symfony2中覆盖表单字段模板

Question

I want to override base Symfony2 form input field, to add my class, but it does not work. Here is my code AcmeDemoBundle:Form:fields.html.twig

{% extends 'form_div_layout.html.twig' %}

{% block form_widget_simple %}
    {% set type = type|default('text') %}
    <input type="{{ type }}" {{ block('widget_attributes') }} {% if value is not empty %}value="{{ value }}" {% endif %}    class="testik_class"/>
{% endblock form_widget_simple %}

In config.yml

# Twig Configuration
twig:
    debug:            "%kernel.debug%"
    strict_variables: "%kernel.debug%"
    form_themes:
        - 'AcmeDemoBundle:Form:fields.html.twig'

But it does not work. In my form class attr still equal to custom_form . What I am doing wrong? Maybe I overiding incorect block ? Can somebody help me? Thanks!

Additionals: Here is my form type:

/**
 * {@inheritDoc}
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('title', 'text', ['label' => 'form.title'])
        ->add('content', 'textarea', ['label' => 'form.content'])
    ;
}

Here is form template:

{{ form_widget(form) }}

Insteresting that when I try override textarea_widget block or integer_widget , all works fine. Or when I try to add data-* attr to simple_widget it works fine too. But class not appends.

Answer 1

If you only want to override a class, you can simply do:

{{ form_widget(form, {'attr': {'class': 'testik_class'}}) }}

in your template, without using any specific form theme. This solves your problem and makes your code even more readable.

Or even when you build your form in PHP:

$builder->add('title', 'text', ['label' => 'form.title', 'attr' => array( 'class' => 'testik_class')])