Symfony - Add text in generated form

The keyword in this question is generated.

Let's assume, that you build a form generator in Symfony. You have entities like Form, Fields and Fields Items (it's options for select box or buttons for radio button field).

So you have this entities and you create a service to create a form from the data. In the service you build the form ($this->buildedForm - generated form, $page->getFormData() - put the data to the constructed form):

$this->buildedForm = $this->formFactory->create(
    'form',
    $page->getFormData(),
    ['action' => '/page/formview/' . $task->getId()]
);

foreach($fields as $field) {
    $fieldBuilderMethod = 'construct' . ucfirst($field->getType()) . 'Field';
    if (method_exists($this, $fieldBuilderMethod)) {
        $this->$fieldBuilderMethod($field);
    }
}
return $this->buildedForm;

And you have methods for each type like (examples for Symfony 2):

private function constructInputField(FormField $field)
{
    $this->buildedForm->add(
        $field->getFieldName(),
        'text',
        [
            'label' => $field->getName(),
        ]
    );
}

private function constructTextareaField(FormField $field)
{
    $this->buildedForm->add(
        $field->getFieldName(),
        'textarea',
        [
            'label' => $field->getName(),
        ]
    );
}

You can now create your custom form type to paste a text in the generated form (it could be placed in the form folder of your bundle and retrieved with namespace "use"):

private function constructSimpletextField(FormField $field)
{
    $this->buildedForm->add(
        $field->getFieldName(),
        new SimpletextType(),
        [
            'label' => $field->getName(),
            'data' => $field->getPlaceholder(),
        ]
    );
}

What in this custom field?

namespace Myproject\MyBundle\Form\TaskTypes;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class SimpletextType extends AbstractType
{
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'disabled' => true,
            'required' => false,
            'mapped' => false,
        ]);
    }

    public function getParent()
    {
        return 'text';
    }

    public function getName()
    {
        return 'simpletext';
    }
}

And the whole magic comes out in the template. For your custom form type you need to make a custom theme (see https://symfony.com/doc/2.7/form/form_customization.html#form-customization-form-themes). And there:

{% block simpletext_label %}{% endblock %}
{% block simpletext_widget %}
    <p>{{ form.vars.data }}</p>
{% endblock %}
{% block simpletext_errors %}{% endblock %}

See, no label, no errors (it just a text) and only text in the field widget. Very handy for generated forms with dynamic template.

EDIT - Symfony 5

In Symfony 5, this solution became simplier. The form customization doesn't changes, and the php code became like this:

namespace Myproject\MyBundle\Form\TaskTypes;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class SimpletextType extends AbstractType
{
    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'disabled' => true,
            'required' => false,
            'mapped' => false,
        ]);
    }

    public function getBlockPrefix(): string
    {
        return 'simpletext';
    }
}

It's used like this :

public function buildForm(FormBuilderInterface $builder, array $options): void {
    /* … */
    $builder->add('anykey', SimpleTextType::class, [
        'data' => "Type your text here",
    ]);
    /* … */
}

Here a sample code which would be self explain

{{ form_start(form, { 'attr': { 'class': 'form-horizontal form-bordered'} }) }}
<div class="form-group">
    <div class="col-md-3 ">
        {{ form_label(form.User, 'Label text', { 'attr': {'class': 'control-label'} }) }}
    </div>
    <p>You are free to add whatever you want here</p>
    <div class="col-md-9">
        {{ form_widget(form.User, { 'attr': {'class': 'form-control'} }) }}
    </div>
</div>
{{ form_rest(form) }}
{{ form_end(form) }}

In any case, the symfony documentation is pretty clear and well-explain about this point.