Symfony 2: Set field as read only after first save - symfony

Question

I have a Symfony 2 entity. When I create a new record, I must fill all the values using a form, but after saving it, one of the values, $amount shouldn't be updatable when I update the others members.
How can I accomplish this? It's possible to mark a form member as a read-only, in runtime?

Answer 1

By using the validation_groups and name options when creating your form, you can change the form.
The name attribute sets the form creation, and the validation_groups takes care of the validation.
For example, in the create/new method of your controller;
public function createAction(Request $request)
{
// Instantiate new Foo object
$client = new Foo();
// create the form (setting validation group)
$form = $this->formFactory->create('foo', $foo, array(
'name' => 'create',
'validation_groups' => array('create')
)
);
// form has been submitted...
if ('POST' === $request->getMethod()) {
// submits the form
$form->handleRequest($request);
// do validation
if ($form->isValid()) {
// do whatever
}
}
// either GET or validation failed, so show the form
return $this->template->renderResponse('FooBundle:foo:add.html.twig', array(
'form' => $form->createView(),
'foo' => $foo
));
}
And in the edit/update function of your controller;
public function updateAction($id, Request $request)
{
// Instantiate Client object
$client = new Foo($id);
// create the form (setting validation group)
$form = $this->formFactory->create('foo', $foo, array(
'name' => 'update',
'validation_groups' => array('update')
));
// form has been submitted...
if ('POST' === $request->getMethod()) {
// submits the form
$form->handleRequest($request);
// do validation
if ($form->isValid()) {
// do whatever
}
}
// either GET or validation failed, so show the form
return $this->template->renderResponse('FooBundle:foo/edit:index.html.twig', array(
'form' => $form->createView(),
'foo' => $foo
));
}
And your Form Type will look something like;
class FooType extends BaseAbstractType
{
protected $options = array(
'data_class' => 'FooBundle\Model\Foo',
'name' => 'foo',
);
private $roleManager;
public function __construct($mergeOptions = null)
{
parent::__construct($mergeOptions);
}
/**
* {#inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$this->$options['name']($builder, $options);
}
private function create(FormBuilderInterface $builder, array $options)
{
// ID
$builder->add('Id', 'text', array(
'required' => true,
'label' => 'ID',
'attr' => array(
'placeholder' => 'Format: 2 alphanumeric (e.g. A1)'
)
));
// Name - only show on create
$builder->add('Name', 'text', array(
'required' => true,
'label' => 'Name',
'attr' => array(
'placeholder' => 'Your name'
)
));
// add the submit form button
$builder->add('save', 'submit', array(
'label' => 'Save'
));
}
private function update(FormBuilderInterface $builder, array $options)
{
// ID
$builder->add('Id', 'text', array(
'required' => true,
'label' => 'ID',
'attr' => array(
'placeholder' => 'Format: 2 alphanumeric (e.g. A1)',
)
));
// Name - just for show
$builder->add('Name', 'text', array(
'required' => true,
'label' => 'Name',
'attr' => array(
'readonly' => 'true' // stops it being editable
)
));
// add the submit form button
$builder->add('save', 'submit', array(
'label' => 'Save'
));
}
}
P.S. All my classes are declared as services, so how you call create forms/views/etc may be different.