Symfony2: How to validate an input field is not-blank, only when checkbox is true?

Question

Within Symfony2 how to validate an inputfield is not-blank, only when the value of a checkbox is 1 (True) - otherwise blank is allowed?

To be more precise, I have a

Answer 1

I think this is the solution:

createForm(new CustomerType(), new Customer());
        $form->handleRequest($request);

        if ($form->isValid()) {
            $data = $form->getData();
            $em = $this->getDoctrine()->getManager();
            $em->persist($data);
            $em->flush();

            return $this->redirect($this->generateUrl('customer_list'));
            // return $this->redirect($this->generateUrl('task_success'));
        }

        return $this->render('InvoicingBundle:Page:customers.html.twig', array(
            'form' => $form->createView()
        ));   
    }

    public function listAction() {
        $customers = $this->getDoctrine()->getManager()
            ->createQuery('SELECT c FROM InvoicingBundle:Customer c')
            ->execute();

        return $this->render(
            'InvoicingBundle:Customer:list.html.twig', 
            array('customers' => $customers));
    }

    public function showAction($id) {
        $customer = $this->get('doctrine')
            ->getManager()
            ->getRepository('InvoicingBundle:Customer')
            ->find($id);

        if (!$post) {
            // cause the 404 page not found to be displayed
            throw $this->createNotFoundException();
        }

        return $this->render(
            'InvoicingBundle:Page:customers.html.twig',
            array('customer' => $customer)
        );
    }

}

?>

    add('billing_id');
        $builder->add('billing_name');
        $builder->add('billing_consignee');
        $builder->add('billing_street');
        $builder->add('billing_address');
        $builder->add('billing_zip');
        $builder->add('billing_city');
        $builder->add('billing_country');
        $builder->add('billing_email', 'email');
        $builder->add('billing_debit', 'checkbox');
        $builder->add('billing_iban');
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver) {
        $resolver->setDefaults(array(
            'data_class' => 'ZeroSpace\InvoicingBundle\Entity\Customer',
            'validation_groups' => function(FormInterface $form) {
                $data = $form->getData();
                if($data->getBillingDebit() == 1) {
                    return array('Default', 'iban_required');
                }
                else {
                    return array('Default');
                }
            },
        ));
    }

    public function getName() {
        return 'customer';
    }
}


?>

    id;
    }

    /**
     * Set billing_id
     *
     * @param integer $billingId
     * @return Customer
     */
    public function setBillingId($billingId)
    {
        $this->billing_id = $billingId;

        return $this;
    }

    /**
     * Get billing_id
     *
     * @return integer 
     */
    public function getBillingId()
    {
        return $this->billing_id;
    }

    /**
     * Set billing_name
     *
     * @param string $billingName
     * @return Customer
     */
    public function setBillingName($billingName)
    {
        $this->billing_name = $billingName;

        return $this;
    }

    /**
     * Get billing_name
     *
     * @return string 
     */
    public function getBillingName()
    {
        return $this->billing_name;
    }

    /**
     * Set billing_consignee
     *
     * @param string $billingConsignee
     * @return Customer
     */
    public function setBillingConsignee($billingConsignee)
    {
        $this->billing_consignee = $billingConsignee;

        return $this;
    }

    /**
     * Get billing_consignee
     *
     * @return string 
     */
    public function getBillingConsignee()
    {
        return $this->billing_consignee;
    }

    /**
     * Set billing_street
     *
     * @param string $billingStreet
     * @return Customer
     */
    public function setBillingStreet($billingStreet)
    {
        $this->billing_street = $billingStreet;

        return $this;
    }

    /**
     * Get billing_street
     *
     * @return string 
     */
    public function getBillingStreet()
    {
        return $this->billing_street;
    }

    /**
     * Set billing_address
     *
     * @param string $billingAddress
     * @return Customer
     */
    public function setBillingAddress($billingAddress)
    {
        $this->billing_address = $billingAddress;

        return $this;
    }

    /**
     * Get billing_address
     *
     * @return string 
     */
    public function getBillingAddress()
    {
        return $this->billing_address;
    }

    /**
     * Set billing_zip
     *
     * @param string $billingZip
     * @return Customer
     */
    public function setBillingZip($billingZip)
    {
        $this->billing_zip = $billingZip;

        return $this;
    }

    /**
     * Get billing_zip
     *
     * @return string 
     */
    public function getBillingZip()
    {
        return $this->billing_zip;
    }

    /**
     * Set billing_city
     *
     * @param string $billingCity
     * @return Customer
     */
    public function setBillingCity($billingCity)
    {
        $this->billing_city = $billingCity;

        return $this;
    }

    /**
     * Get billing_city
     *
     * @return string 
     */
    public function getBillingCity()
    {
        return $this->billing_city;
    }

    /**
     * Set billing_country
     *
     * @param string $billingCountry
     * @return Customer
     */
    public function setBillingCountry($billingCountry)
    {
        $this->billing_country = $billingCountry;

        return $this;
    }

    /**
     * Get billing_country
     *
     * @return string 
     */
    public function getBillingCountry()
    {
        return $this->billing_country;
    }

    /**
     * Set billing_email
     *
     * @param string $billingEmail
     * @return Customer
     */
    public function setBillingEmail($billingEmail)
    {
        $this->billing_email = $billingEmail;

        return $this;
    }

    /**
     * Get billing_email
     *
     * @return string 
     */
    public function getBillingEmail()
    {
        return $this->billing_email;
    }

    /**
     * Set billing_debit
     *
     * @param boolean $billingDebit
     * @return Customer
     */
    public function setBillingDebit($billingDebit)
    {
        $this->billing_debit = $billingDebit;

        return $this;
    }

    /**
     * Get billing_debit
     *
     * @return boolean 
     */
    public function getBillingDebit()
    {
        return $this->billing_debit;
    }

    /**
     * Set billing_iban
     *
     * @param string $billingIban
     * @return Customer
     */
    public function setBillingIban($billingIban)
    {
        $this->billing_iban = $billingIban;
        return $this;
    }

    /**
     * Get billing_iban
     *
     * @return string 
     */
    public function getBillingIban() {
        return $this->billing_iban;
    }

}