Is possible to get some list of fields in FormEvents::PRE_SET_DATA?
I need edit entity which I put to Form by Event. Entity contains PersistCollection which I need transform to ArrayObject.
I would like created on automatic for many entities. I need list of fields (names) for data mapping.
My idea:
$fields = $event->getFormFields();
foreach ($fields as $field) {
dump($field); --> return 'name'
}
It's not completely clear what you're trying to achieve, but yes, you can get all child forms from parent form easily:
You can either use:
foreach ($event->getForm()->all() as $childForm) {
// ...
}
or, since Symfony Form implements IteratorAggregate interface:
foreach ($event->getForm() as $childForm) {
}
Related
Is there any way to show/hide actions based on the underlying entity? For example, I need to show the delete action of a Category entity if and only if it doesn't have any children post.
I tried to remove that from configureActions method in my CRUD controller, but I haven't access to the AdminContext object when that method is being called.
How can I do that?
After tracing in EasyAdmin's code base I found this solution:
Consider I have a Category entity with a OneToMany relation to posts. I need to show delete action of each category if the category doesn't have any post.
public function configureActions(Actions $actions): Actions
{
$action = parent::configureActions($actions)->getAsDto(Crud::PAGE_INDEX)->getAction(Crud::PAGE_INDEX, Action::DELETE);
if (!\is_null($action)) {
$action->setDisplayCallable(function (Category $category) {
return $category->getPosts()->count() === 0;
});
}
return $actions;
}
Looking for a straightforward way to add constraints dynamically to all of my form fields. So far I've hit upon the idea of using a form type extension, which kind of works: I can modify the form view and then manually check the view on form submission.
However, is there a smarter way to add real Symfony-based constraints in real-time?
(Note that the constraints need to be added to the form in real-time as the form loads based on user configuration in the database.. Predefined form groups and the like won't work.)
I would suggest to use form events.
Use the PRE_SUBMIT event to edit the form before validation.
Recreate your fields with $event->getForm()->add(...) adding your constraints.
Of course you can automatically add the listener to all form using a FormExtension which adds the listener.
EDIT : Some examples from Alsatian67/FormBundle
Your extension should looks like :
class ExtensibleExtension extends AbstractTypeExtension
{
private $extensibleSubscriber;
public function __construct($extensibleSubscriber) {
$this->extensibleSubscriber = $extensibleSubscriber;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
// Only apply on base form
if($builder->getForm()->isRoot())
{
$builder->addEventSubscriber($this->extensibleSubscriber);
}
}
public function getExtendedType()
{
return FormType::class;
}
}
And your EventListener / EventSubscriber should iterate on all the children :
foreach($event->getForm()->all() as $child){
$childName = $child->getName();
$type = get_class($child->getConfig()->getType()->getInnerType());
$options = $child->getConfig()->getOptions();
$options['constraints'] = array(/* ... */);
$form->add($childName,$type,$options);
}
I have 2 forms. One is the main form with fields and a collection and inside this fields the other form. On each form (the parent and the child) I add a PRE_SUBMIT subscriber. Now, my problem is, I want to load a method specific to the parent form after execution of the PRE_SUBMIT on the child event.
Actually, following the documentation, in spite I give priority, I have always this order :
parent::PRE_SUBMIT -> child::PRE_SUBMIT
and by the way I want :
parent::PRE_SUBMIT -> child::PRE_SUBMIT -> parent::PRE_SUBMIT(other)
Do you have an idea if it's possible to do that and in what way ?
Remove the event PRE_SUBMIT on your children (only add it for the parent), and inside your event handler do the specific code for your children.
E.g.
public function yourPresubmitMethod(FormEvent $event)
{
$form = $event->getForm();
// Code before
// Code for each child
foreach ($form as $child)
{
$child->theChildPreSubmitMethod();
}
// Code after
}
When a form doesn't validate, I need to access the submitted data inside a Form Class in order I can set some options in a custom field.
I have tried with
$data = $builder->getForm()->getData();
$data = $builder->getData();
but $data has the empty object. So... what is the correct form to access the submitted data by the user after validation error in the form class?
Thanks
The problem is you're trying to access submitted data when it has not be handled yet. Basically, when you are in a builder (buildForm for the abstract types), you are building your form structure. It has nothing to do with form submission/binding. This is why you get the initial data when you call $builder->getData() because it only know the initial data at this state.
Knowing that the form component allows you to access the submitted data via events. You can attach a listener to your builder and rely on one of the *_submit event. The FormEvent class will given you the submitted data with $event->getData().
See this doc for more information: http://symfony.com/doc/current/cookbook/form/dynamic_form_modification.html
Look into $options variable (var_dump it)
As I remeber you are looking for
$options['data']
Using Form Events.
For those who wonder how Form Events are used.
Here is an example where you can modify the form after the user has tapped the submit button.
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;
// ...
/* Listener to order to set a price if it does not exist yet */
$builder->get('price')->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) {
$data = $event->getData();
// modify it as you wish
$event->setData($data);
});
The FormEvents::PRE_SUBMIT event is dispatched at the beginning of the
Form::submit() method.
If needed, here is an example where you can modify the form price before you display it.
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormEvent;
// ...
/* Listener to order to set a price if it does not exist yet */
$builder->get('price')->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
$data = $event->getData();
if (null === $data) { $data = '0.00'; }
$event->setData($data);
});
The FormEvents::PRE_SET_DATA event is dispatched at the beginning of
the Form::setData() method.
In my project I have an abstract entity, let's call it Parent, and two child entities: ChildA and ChildB that extend Parent class. I'm using doctrine and a single table strategy, has ChildA and ChildB are similiar. This part is working ok, now my problem is with the form.
I want to have a single form that can be used to create an entity of one of those classes (ChildA or ChildB), so I want to have a first field in the form to select which kind of entity the user wants to create, and show the fields for that class (has there are only one different field, I'm using javascript to show/hide the field according to the selected class)
To accomplish this I have created a form with all the fields of both ChildA and ChildB plus the field to select the type, and my idea was in controller check the type, and then create a specific form associated with ChildA or ChildB according to the selected type, and bind it with the valus received from the main form, but the problem here is how to display the errors in this form
Anyone have a good solution for this problem?
I think you make it very difficult this way.
For this problem i would create 2 forms (FormChildA, FormChildB) with the associated fields accordingly.
Because you are using javascript anyway, just render the page with a choice and get the form with ajax:
<div id="select-type">
<button value="child_a" type="button">Select ChildA</button>
<button value="child_b" type="button">Select ChildB</button>
</div>
<div id="form-container"></div>
<script>
$('#select-type button').on('click', function(event) {
event.preventDefault();
$.get('path/to/get_ajax_form', {type: $(this).val()}, function(data) {
$('#form-container').html(data);
});
});
</script>
Create a Controller method to retrieve the form:
public function getAjaxFormAction()
{
$type = $this->get('request')->query->get('type');
switch( $type ) {
case 'child_a':
$form = $this->createForm(new FormChildA, new ChildA);
break;
case 'child_b':
$form = $this->createForm(new FormChildB, new ChildB);
break;
}
return $this->render('AcmeBundle:Forms:_type_form.html.twig', array(
'form' => $form->createView(),
'type' => $type,
));
}
Add to each form a hidden field with the form type value,
this way you can validate these forms in one method (same way as you retrieve them).
This makes it easier to modify and validate each form separately!