Question

I’m looking for guidance how to have form prefilled with data taken from existing object. I guess it should be working with method setData, I was expecting something simple like
$form->setData($existingObject) but no success.

For better explanation let’s have a simple example.
I have form where user inputs his personal data. Form is created in controller by calling form.factory,

$form = $this->get('form.factory')->create(new personType());

I have form class “personType” and this form class has defined data_class object called “person”. User submits form, data are saved in object person and this object is saved in session. I need to have option reopen the form and fill in data saved in object stored in session.

Answer 1

In your controller, you need to create/find your object then pass it to your createForm

$task = new Task();
$task->setTask(‘Write a blog post’);
$task->setDueDate(new \DateTime(‘tomorrow’));

$form = $this->createForm(new TaskType(), $task);

http://symfony.com/doc/master/book/forms.html#creating-form-classes

In your exemple, try

$person = …;
$form = $this->get(‘form.factory’)->create(new personType(), $person);