How render a form many times - forms

Question

im developing the create student requiriment for my application.
I have my Student entity, the entity contains two properties:
User (instance of User entity)
Course (instance of Course entity)
I build the form, but i wish render the form same times via a click button. On this way the administrator could be add any students without refresh the page.
Its is possible ? How manage the submit on the controller ?
Any ideas ? Thanks
NOTE: Im search a similiar Phpmyadmin behavior when add a new record.

Answer 1

What you should do is create a new object and form (e.g. StudentCollection) that allows for adding the student form using the collection type. This will allow you to manage the dynamically adding/removing student forms a lot better.
More on form collections here http://symfony.com/doc/current/cookbook/form/form_collections.html
e.g. Assuming you have a student form called StudentFormType, something like this should work. There's a good example on the link above that you should use if you want to know how to dynamically add/remove student forms as well as handle the submission.
// src/PathTo/YourBundle/Form/Type/StudentCollectionFormType.php
// Form object
class StudentCollectionFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('students', 'collection', array(
'type' => new StudentFormType(),
'allow_add' => true,
'allow_delete' => true,
))
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'PathTo\YourBundle\Model\StudentCollection',
));
}
// ...
}
// src/PathTo/YourBundle/Model/StudentCollection.php
namespace PathTo\YourBundle\Model;
// ...
class StudentCollection
{
// ...
protected $students;
public function __construct()
{
$this->students = new \Doctrine\Common\Collections\ArrayCollection();
}
public function getStudents()
{
return $this->students;
}
public function addStudent(Student $student)
{
$this->students->add($student);
}
public function removeStudent(Student $student)
{
$this->students->removeElement($student);
}
}
Then in your controller
// src/PathTo/YourBundle/Controller/StudentController.php
public function editAction(Request $request)
{
$em = $this->getDoctrine()->getManager();
$collection = new StudentCollection();
// Prepopulate the collection with students
// ...
$form = $this->createForm(new StudentCollectionFormType(), $collection);
$form->handleRequest($request);
if ($form->isValid()) {
foreach ($collection->getStudents() as $student) {
$em->persist($student);
}
$em->flush();
// redirect back to some edit page
// ...
}
// render some form template
// ...
}