Setting name attribute of symfony 2 form field

Question

How to set name attribute of rendered field in symfony 2?

Expected output:

     <input type="text" name="test" value="test" />

Rendering the field this way

     {{ form_widget(form.test, { 'attr': {'name': 'test'} }) }}

definitely does not work.

Output is still

     <input type="text" name="form[test]" value="test" />.

Is there any way to set the name attribute or id attribute dynamically? Thank you.

Answer 1

<input type="text" name="form[test]" value="test" />

already has test as name. Of course there is still the root form name called form in your case. Removing this is not really recommended, because when you read the request to populate form data you can identify the form by its form name.

Read [Form] Enable empty root form name https://github.com/symfony/symfony/pull/2936

Answer 2

overriding Twig block this way:

{% block widget_attributes -%}
id="{{ id }}"
{%- if read_only %} readonly="readonly"{% endif -%}
{%- if disabled %} disabled="disabled"{% endif -%}
{%- if required %} required="required"{% endif -%}
{%- for attrname, attrvalue in attr -%}
    {{- " " -}}
    {%- if attrname in ['placeholder', 'title'] -%}
        {{- attrname }}="{{ attrvalue|trans({}, translation_domain) }}"
    {%- elseif attrvalue is sameas(true) -%}
        {{- attrname }}="{{ attrname }}"
    {%- elseif attrvalue is not sameas(false) -%}
        {{- attrname }}="{{ attrvalue }}"
    {%- endif -%}
{%- endfor -%}
name={{full_name}}
{%- endblock widget_attributes %}

The change is just moving name={{full_name}} from the first line to the last one, so when you add the name attr to the form builder add element, the name will be no longer ignored.