Customize form field rendering - forms

Question

I would like to customize the rendering of a form field in the edit page from sonata admin bundle to include an applet that uses the text content of a field.
I know that I have to edit the configureFormFields function in the admin class, but I need to know 3 things:
What is the syntax to provide a field form template
Where to put the template file ( which directory )
What the template have to looks like.

Answer 1

Found a solution
What i have done is:
Created a field type, lets call it myfieldType in myCompany\myBundle\Form\Type\myfieldType.php
namespace myCompany\myBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
class myfieldType extends AbstractType
{
public function getParent()
{
return 'text';
}
public function getName()
{
return 'myfield';
}
}
Registered the Type in app/config/services.yml
myCompany.myBundle.form.type.myfield:
class: myCompany\myBundle\Form\Type\myfieldType
tags:
- { name: form.type, alias: myfield }
In my myentityAdmin class,
protected function configureFormFields(FormMapper $formMapper)
{
$formMapper
->add('myfieldname', 'myfield')
...
}
and
public function getFormTheme() {
return array('myCompanymyBundle:Admin:myfield_edit.html.twig');
}
and the template :
{# src/mycompany/myBundle/Resources/views/Form/myfield_edit.html.twig #}
{% block myfield_widget %}
{% spaceless %}
{{ block('textarea_widget') }}
{% endspaceless %}
{% endblock %}
And now i can access the form field value by the twig variable "value" !
So easy... when you got it.

Answer 2

user1254498's solution won't work unless the block name prefix matches the name of the form type. At least with the last version of sonata admin bundle (2.2.12). In this case:
{# src/mycompany/myBundle/Resources/views/Form/myfield_edit.html.twig #}
{% block myfield_widget %}
{% spaceless %}
{{ block('textarea_widget') }}
{% endspaceless %}
{% endblock %}
And, regarding getFormTheme(), you shoud return also the parent theme, otherwise you may break the whole style...
public function getFormTheme()
{
return array_merge(
parent::getFormTheme(), array(
'mycompanyBundle:Form:myfield_edit.html.twig')
);
}
Also, you can access the admin service in the twig template with the variable sonata_admin.admim.

Answer 3

In your services.yml file you define the template for your edit Action:
app.admin.product:
class: AppBundle\Admin\ProductAdmin
arguments: [~, AppBundle\Entity\Product, AppBundle:Admin\Product]
tags:
- {name: sonata.admin, manager_type: orm, group: Products, label: Products}
calls:
- [ setTemplate, [edit, AppBundle:Product:edit.html.twig]]
In that template you can then override templates for fields in your form:
{% extends 'SonataAdminBundle:CRUD:base_edit.html.twig' %}
{% form_theme form.selectall 'AppBundle:Form:selectall.html.twig' %}
{% form_theme form.Country 'AppBundle:Form:country.html.twig' %}
Then my template looks like that:
{% block form_row %}
<div class="form-group">
{{ form_label(form) }}
{% set c = 0 %}
{% for i in form %}
{% set c = c+1 %}
{% if (c == 1) %}
<div style="float: left; width: 20%;">
{% endif%}
{{ form_row(i) }}
{% if ((c == 60) or (form|length == loop.index)) %}
</div>
{% set c = 0 %}
{% endif%}
{% endfor %}
</div>
{% endblock form_row %}
In this case, my countries check boxes appear in column of 60 elements, not in one column with the whole list of elements.
Hope this is helpful to someone else.