Error with entity field - Symfony2 - symfony

Question

This is my file:
<?php
namespace EM\ExpensesBundle\Entity;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\AbstractType;
class ChooseCatType extends AbstractType
{
public function buildForm(FormBuilder $builder, array $options)
{
$builder->add('name', 'entity', array(
'class' => 'EMMyFriendsBundle:Category',
'property' => 'name',
'empty_value' => 'All items',
'required' => false,
'query_builder' => function ($repository)
{ return $repository->createQueryBuilder('cat')
->select('cat')
->orderBy('cat.name', 'ASC');
}, ));
}
public function getName()
{
return 'choose_category';
}
}
Here I create the form:
namespace EM\ExpensesBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use EM\ExpensesBundle\Entity\Category;
use EM\ExpensesBundle\Entity\ChooseCatType;
class HomeController extends Controller
{
public function indexAction()
{
//Categories
$cat = new Category();
$dd_form = $this->createForm(new ChooseCatType(), $cat);
return $this->render('EMExpensesBundle:Home:index.html.twig', array(
'dd_form' => $dd_form->createView()));
}
}
and template:
{% extends "::base.html.twig" %}
{% block title %}
Expenses
{% endblock %}
{% block body %}
<div class="content">
<p> Choose category: </p>
<form class="cat" action="" method="post" {{ form_enctype(dd_form) }}>
{{ form_widget(dd_form.name) }}
{{ form_rest(dd_form) }}
<input type="submit" value="Show items" />
</form>
Manage Categories
</div>
{% endblock %}
but I get an error:
Fatal error: Declaration of EM\ExpensesBundle\Entity\ChooseCatType::buildForm()
must be compatible with that
of Symfony\Component\Form\FormTypeInterface::buildForm()
in C:\xampp\htdocs\Expenses\src\EM\ExpensesBundle\Entity\ChooseCatType.php
on line 9
Any ideas?

Answer 1

Use FormBuilderInterface in your method signature:
public function buildForm(FormBuilderInterface $builder, array $options)